Ultimate Guide to Net Metering Gross Metering Net

Rooftop solar is becoming a mainstream choice for Indian homeowners who want lower electricity bills and a greener home. Yet, the way you are credited for the power you generate can be confusing. The three settlement models—net metering, gross metering and net billing—determine whether you offset your own consumption, get a fixed payment, or receive a hybrid credit. Understanding these models helps you pick the right system size, estimate savings, and avoid surprises on your bill.

In India, each state’s electricity regulatory commission (SERC) and the local distribution company (DISCOM) decide which model applies, the capacity caps, and the settlement rates. The process usually starts with an application to the DISCOM, a feasibility check, a signed agreement, installation of a bidirectional (net) meter, and finally commissioning of the solar plant. While the exact numbers differ across states, the overall steps remain similar.

One important safety feature to remember is anti‑islanding. Grid‑tied rooftop systems automatically shut down during a power cut unless they are paired with a battery or a hybrid inverter. This protects utility workers and ensures the grid remains stable. The guide below walks you through how each model works, the cost and savings implications, and the compliance checklist you need to follow.

Quick Answer: Net metering lets you offset your bill with excess solar, gross metering pays you a fixed rate for all generation, and net billing offers a mixed credit—choose based on your state’s rules and your consumption pattern.

Key Facts

• Net metering allows rooftop owners to export surplus power to the grid and offset it against their electricity bill. [MNRE]
• Settlement models (net metering, gross metering, net billing) are set by each state’s SERC and implemented by the local DISCOM. [PMSuryaghar]
• A bidirectional (net) meter is installed by the DISCOM after the application is approved. [MNRE]
• Grid‑tied systems automatically shut down during power cuts for safety unless paired with battery/hybrid inverters. [IEA]
• The application process typically includes feasibility check, agreement signing, meter installation, and commissioning. [PIB]

Table of Contents

• Why Net Metering Gross Metering Net Matters
• Common Misconceptions
• Net Metering Gross Metering Net – how it works / what you must know
• Net Metering Gross Metering Net — costs, savings and returns
• Use Cases and Scenarios
• Net Metering Gross Metering Net – Step‑by‑Step Roadmap for Indian Homeowners
• Illustrative Example
• Alternatives and Comparison – Choosing the Right Settlement Model
• Net Metering Gross Metering Net — rules, compliance and regulations
• Frequently Asked Questions
• Conclusion

Why Net Metering Gross Metering Net Matters

Rooftop solar is no longer a luxury; it is becoming a mainstream way for Indian homeowners to cut electricity bills, reduce carbon footprints, and increase energy security. Yet, the financial benefit you receive depends heavily on the settlement model that your local DISCOM follows – whether it is net metering, gross metering, or net billing. Understanding these models is the first step toward making an informed decision about a rooftop system.

The opportunity in numbers

• Rising electricity tariffs – DISCOMs have increased residential tariffs by an average of 8 %‑10 % per year over the last five years.
• Solar‑PV cost decline – The cost of a 1 kW rooftop system fell by roughly 30 % between 2018 and 2023, making the pay‑back period shorter.
• Government incentives – Central and state subsidies, along with a 5 % GST on solar components, lower the upfront outlay for most households.

When a homeowner installs a 3 kW system, the amount of electricity that can be exported to the grid and the credit received for that export are dictated by the settlement model. In a net metering arrangement, any surplus kilowatt‑hours (kWh) you generate are offset against your future consumption, effectively reducing the next month’s bill. In gross metering, every kWh you export is bought by the DISCOM at a pre‑determined rate, while you continue to pay for the electricity you draw from the grid at the normal tariff. Net billing sits somewhere in between – the exported energy earns a credit at a rate that is usually lower than the retail tariff, and the remaining consumption is billed at the usual rate.

Because each state’s electricity regulatory commission (SERC) sets its own rules, the exact credit you receive can vary dramatically. Some states allow a one‑to‑one offset (1 kWh exported = 1 kWh credit), while others apply a discount of 30 %‑50 % on the export credit. The key takeaway is that the settlement model directly influences the return on investment (ROI) and the pay‑back period.

Comparison of the three models

Feature	Net Metering	Gross Metering	Net Billing
How surplus is treated	Exported kWh offset future consumption (one‑to‑one or weighted)	Exported kWh sold to DISCOM at a fixed rate	Exported kWh credited at a lower, predefined rate
Bill impact	Lower future bills; credit may roll over month‑to‑month	Immediate revenue from export, but still pay for drawn electricity	Mixed – part of bill reduced by credit, part paid at normal tariff
Typical credit rate	Same as retail tariff or a weighted factor	Fixed purchase price (often lower than retail)	Discounted rate (e.g., 60 %‑80 % of retail)
Installation requirement	Bi‑directional net meter installed by DISCOM	Standard export meter (unidirectional)	Usually a net meter with additional billing software
Suitability	Small‑to‑medium residential systems where self‑consumption is high	Large commercial/industrial setups that aim to sell excess power	Consumers who want a blend of revenue and bill reduction
Regulatory control	Defined by state SERC; varies by state	Defined by state SERC; varies by state	Defined by state SERC; varies by state

Note: The exact caps on system size, the ratio of export credit to retail tariff, and the settlement period differ from state to state. Always check the latest guidelines from your state’s SERC or contact your DISCOM.

Process flow – from idea to a working meter

1. Application – You (or your installer) submit a net‑metering/gross‑metering/net‑billing application to the DISCOM.
2. Feasibility check – The DISCOM verifies that your roof can accommodate the proposed capacity and that the local grid can accept the export.
3. Agreement signing – Once approved, a power purchase agreement (PPA) or net‑metering agreement is signed, outlining the settlement terms.
4. Meter installation – A bi‑directional net meter (for net metering) or a standard export meter (for gross metering) is installed by the DISCOM.
5. Commissioning – Your solar inverter is commissioned, and the system starts feeding electricity to the grid.
6. Billing & settlement – Every month, the DISCOM calculates your consumption, export, and the applicable credit based on the chosen model.

Why the anti‑islanding rule matters

All grid‑tied solar systems in India must shut down automatically during a power cut. This safety feature, called anti‑islanding, prevents the inverter from feeding electricity into a dead grid, protecting utility workers and avoiding equipment damage. Only systems equipped with battery storage or hybrid inverters can operate in “island mode” and continue supplying power during outages. If uninterrupted power is a priority for you, consider a battery‑backed hybrid solution, but remember that the settlement model (net, gross, or net billing) still applies to the grid‑connected portion of the system.

The financial picture for a typical 3 kW home system

Item	Approx. Cost (INR)	Remarks
Solar panels, inverter, mounting (CAPEX)	1,20,000 – 1,40,000	Excludes GST and any subsidies
GST (5 %)	6,000 – 7,000	Applied on solar components
State subsidy (if any)	Up to 30 % of CAPEX	Varies by state and income slab
Annual electricity bill (pre‑solar)	12,000 – 15,000	Based on 180 kWh/month average usage
Expected annual export (kWh)	350 – 450	Depends on location & orientation
Net‑metering credit (1:1)	Reduces bill by ~₹5,000‑₹6,000	Credit rolls over to next month
Gross‑metering revenue (₹3/kWh)	₹1,050 – ₹1,350 per year	Separate from bill payment
Net‑billing credit (₹2/kWh)	₹700 – ₹900 per year	Reduces bill partially

These figures illustrate how the same rooftop system can produce different cash‑flows under each settlement model. For a homeowner focused on maximising bill reduction, net metering is usually the most attractive. If you have excess generation and want a modest revenue stream, gross metering may be preferable, especially in states where the export rate is competitive.

The bigger picture – scaling solar across India

The Indian government aims to achieve 250 GW of solar capacity by 2030, with a significant share coming from rooftop installations. However, the policy heterogeneity across states can create confusion for consumers. A clear understanding of net metering, gross metering, and net billing helps you:

• Choose the right installer who knows the local SERC guidelines.
• Negotiate a proposal that reflects the most beneficial settlement model for your usage pattern.
• Plan for future upgrades, such as adding battery storage, without violating anti‑islanding requirements.

For installers, a unified software platform that tracks subsidy calculations, GST, and state‑specific rules can streamline the whole process. Platforms like SolarSwytch offer a single pane of glass for lead management, proposal generation, and compliance, allowing installers to focus on delivering the right system to you.

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Takeaway

Understanding the distinction between net metering, gross metering, and net billing is essential before you invest in a rooftop solar system. The model you fall under will dictate how quickly you see savings, whether you receive any revenue, and how your system behaves during power cuts. Always verify the latest state‑specific rules with your DISCOM, and consider the long‑term financial impact of each settlement option.

Common Misconceptions

Myth 1 – “Net metering gives me a full credit for every kilowatt‑hour I export, so I’ll never pay the DISCOM again.”

Reality – While many states offer a one‑to‑one credit, the actual credit rate is set by the state SERC and can be weighted (e.g., 0.8 kWh credit for 1 kWh exported). Moreover, the credit usually rolls over for a limited period (often 12 months) and cannot be cashed out. If your consumption exceeds your generation, you will still pay for the net draw.

Myth 2 – “Gross metering is only for large commercial plants; residential users cannot benefit.”

Reality – Gross metering is available to residential customers in several states, especially where the DISCOM has a predefined purchase price for exported power. Homeowners can earn a modest revenue stream, though the rate is typically lower than the retail tariff. The key is to compare the gross‑metering purchase price with the net‑metering credit you would receive.

Myth 3 – “With net billing, I get the same benefit as net metering but with more flexibility.”

Reality – Net billing applies a discounted credit for exported energy, which is usually less than the retail rate you would get under pure net metering. While it provides some revenue, the overall bill reduction is smaller. The model is often chosen by states that want to encourage self‑consumption while still paying for excess generation.

Myth 4 – “If I install a battery, I can keep feeding the grid during a power cut.”

Reality – Batteries enable islanded operation, meaning your home can stay powered when the grid is down. However, the anti‑islanding rule still requires the inverter to disconnect from the grid during an outage unless it is a certified hybrid inverter with battery backup. The settlement model (net, gross, or net billing) applies only to the portion of the system that remains grid‑connected; the battery‑only operation does not generate export credits.

Myth 5 – “All states treat net metering the same way, so I can copy a proposal from another state.”

Reality – Each state’s SERC decides the capacity caps, metering requirements, settlement periods, and credit formulas. A proposal that works in Karnataka may be invalid in Tamil Nadu or Maharashtra. Always refer to the specific guidelines of your state’s electricity regulator and your DISCOM.

Myth 6 – “I don’t need a professional installer; I can set up the system myself and still get net metering.”

Reality – The application, feasibility check, and meter installation must be performed through an authorized DISCOM‑approved installer. Self‑installation can lead to rejection of the application, delayed approvals, or even safety violations. Professional installers also ensure that the system complies with anti‑islanding standards and local wiring codes.

Myth 7 – “The net‑metering agreement is a one‑time contract; I don’t have to worry about renewals.”

Reality – Most agreements are valid for a specific period (often 10‑25 years) and may include clauses for periodic reviews, tariff revisions, or meter recalibration. It is important to read the contract carefully and stay informed about any regulatory changes that could affect your settlement.

Myth 8 – “Higher rooftop capacity always means higher savings.”

Reality – Savings depend on the ratio of generation to consumption, the settlement model, and the credit rate. Oversizing a system beyond your consumption can lead to excess export that may be credited at a lower rate (gross metering) or may not be compensated at all if the DISCOM imposes export caps. A balanced system that matches your average load typically yields the best ROI.

By dispelling these myths, you can approach rooftop solar with realistic expectations and choose the settlement model that truly aligns with your financial goals.

Net Metering Gross Metering Net – how it works / what you must know

Understanding the three settlement models is the first step toward an informed rooftop solar purchase. Below we break down each model, the technical flow, and the practical impact on your electricity bill.

1. Net Metering

Net metering is the most common model for residential rooftop solar in India. Under this scheme:

• Export‑Import Balance: Any surplus electricity your system generates during the day is fed back to the grid through a bidirectional meter. That surplus is credited against the electricity you draw from the grid at other times, usually on a monthly basis.
• Billing Impact: Your bill reflects the net consumption (consumption minus export). If you export more than you import in a billing cycle, the excess may be carried forward as a credit for the next month, depending on the DISCOM’s policy.
• System Shutdown: During a grid outage, a standard grid‑tied inverter will stop feeding power to the house to avoid islanding. Only hybrid or battery‑backed inverters can keep critical loads running.

2. Gross Metering

Gross metering treats your solar generation as a separate transaction:

• All Generation Purchased: Every kilowatt‑hour (kWh) produced is measured by a separate meter and sold to the DISCOM at a predetermined rate, often lower than the retail tariff.
• No Direct Offset: Your own consumption is billed at the normal retail rate; you do not receive a direct offset for the electricity you use from the grid.
• Use Cases: This model is common for larger commercial installations or in states where net metering is limited.

3. Net Billing

Net billing is a hybrid of the two:

• Dual Rates: The electricity you export is compensated at a rate set by the DISCOM (often close to the wholesale price), while the electricity you import is billed at the retail tariff.
• Monthly Settlement: The net amount payable is calculated by subtracting the export credit from the import charge.
• Flexibility: This model can be attractive where the DISCOM offers a favorable export rate but does not allow full net‑metering credits.

4. Application and Installation Flow

Step	Description
1. Application	Submit a rooftop solar proposal to the DISCOM (often through an online portal or via your installer).
2. Feasibility Check	The DISCOM assesses roof space, load profile, and compliance with state rules.
3. Agreement	A power purchase agreement (PPA) or net‑metering agreement is signed, outlining settlement model, capacity, and tariffs.
4. Meter Installation	A bidirectional (net) meter or separate generation meter is installed by the DISCOM.
5. Commissioning	After inspection, the system is energized and starts feeding power to the grid.

5. Impact of Settlement Model on Savings

• Net Metering: Maximises self‑consumption benefits because you offset your own usage directly.
• Gross Metering: Provides a steady, predictable revenue stream but usually at a lower rate than retail electricity.
• Net Billing: Offers a middle ground—some offset plus a modest export payment.

6. External Reference

For the latest regulatory updates, visit the Ministry of New and Renewable Energy’s portal: MNRE – Solar Policies.

Net Metering Gross Metering Net — costs, savings and returns

When you evaluate a rooftop solar system, the financial picture depends on three pillars: up‑front cost, operational savings, and revenue from export. The settlement model you fall under changes how each pillar contributes to your return on investment (ROI).

1. Up‑front Cost

The cost of a residential rooftop system in India typically includes solar panels, inverters, mounting structures, wiring, and installation labor. While exact figures vary by location and installer, most projects fall within a reasonable range that balances quality and affordability. Installers often use SolarSwytch’s platform to generate subsidy‑aware proposals, ensuring you capture any central or state incentives.

2. Savings Through Self‑Consumption

• Net Metering: The biggest savings come from using the power you generate directly, reducing the amount you purchase from the DISCOM at the retail tariff. The more you align generation with peak daytime usage (air‑conditioners, fans, lighting), the higher the offset.
• Gross Metering: Since you do not offset your own consumption, the only financial benefit is the payment for exported energy. Savings are therefore limited to the export rate.
• Net Billing: You receive a modest credit for export, which reduces the net amount you pay for imported electricity. The overall savings sit between the net and gross models.

3. Revenue from Export

• Gross Metering: Every kWh exported is paid at the agreed gross rate. This creates a predictable cash flow but usually at a lower price than the retail tariff.
• Net Billing: Exported kWh is compensated at a rate that may be higher than gross but lower than the retail rate, offering a partial revenue stream.
• Net Metering: Exported energy is not paid separately; it merely reduces future bills. In some states, surplus credits can be rolled over for several months.

4. Payback Period

The payback period is the time required for cumulative savings and revenue to equal the initial investment. Qualitatively:

• Shortest Payback: Net metering, because you both avoid paying retail electricity and reduce the need for a large battery backup.
• Medium Payback: Net billing, where you benefit from both offset and export credit.
• Longest Payback: Gross metering, as you rely solely on export revenue.

5. Example Cost‑Benefit Table (Qualitative)

Settlement Model	Primary Benefit	Typical Payback Trend
Net Metering	Direct bill offset	4‑6 years
Net Billing	Mixed offset + export credit	5‑7 years
Gross Metering	Fixed export revenue	6‑9 years

Note: Actual payback varies with system size, location, electricity tariff, and state‑specific rules.

6. Role of Subsidies and GST

Central and state subsidies can reduce the capital outlay by a percentage of the system cost. GST is applicable on the total invoice, but installers can calculate the exact amount using SolarSwytch’s GST calculator, ensuring transparency in the proposal.

7. Maintenance and O&M Costs

Annual operation and maintenance (O&M) expenses are modest, typically a small percentage of the system cost. These include cleaning, inverter warranty service, and periodic performance checks. Proper O&M ensures the system continues to generate at its rated capacity, preserving the ROI.

8. Financial Planning Tips

• Assess Load Profile: Align system size with your peak daytime consumption to maximise net‑metering benefits.
• Check State Policy: Since settlement models differ by state, confirm with your DISCOM which model applies before finalising the proposal.
• Consider Hybrid Inverters: If you want backup during outages, a hybrid inverter with battery storage can keep essential loads running while still participating in net metering.

Use Cases and Scenarios

Rooftop solar is versatile, and the settlement model you fall under shapes how each scenario plays out. Below are common situations Indian homeowners face, along with guidance on which model may suit them best.

1. High‑consumption household with daytime work‑from‑home

Profile: A family of four, with two members working remotely, consumes around 500 kWh per month, most of it during daylight hours.

Best model: Net metering. Because a large portion of the load occurs when the solar panels are generating, the household can directly offset its consumption. Any surplus exported in the evening is credited against the next month’s bill, effectively reducing the overall payable amount.

What to watch for: Verify whether your state offers a 1:1 credit or a weighted factor. If the credit is weighted, you may still benefit but the pay‑back period could be slightly longer.

2. Small apartment with limited roof space

Profile: A 2‑BHK apartment with a 20 m² terrace, installing a 2 kW system to cover about 30 % of the monthly bill.

Best model: Net billing (if net metering is not available). In many states, apartments fall under a stricter net‑metering cap, or the DISCOM may only allow net billing for low‑capacity systems. The exported energy earns a discounted credit, still helping lower the bill.

What to watch for: Ensure the installer files the correct application type and that the DISCOM can accommodate a bi‑directional meter for a small system.

3. Homeowner with frequent power cuts, wants backup

Profile: Lives in an area with unreliable grid supply, wants to keep essential appliances running during outages.

Best model: Gross metering combined with a battery‑backed hybrid inverter. Since the system will shut down during a cut (anti‑islanding), the battery provides backup. Gross metering ensures that any power fed to the grid when it is up is purchased at a fixed rate, while the battery handles the outage periods.

What to watch for: Confirm that the hybrid inverter is certified for islanded operation and that the DISCOM permits gross metering for your system size.

4. Environment‑focused homeowner, not primarily money‑driven

Profile: Wants to reduce carbon footprint and showcase a green home, less concerned about immediate savings.

Best model: Net metering (if available) because it maximises self‑consumption, which directly reduces the amount of fossil‑fuel‑based electricity drawn from the grid. Even if the credit rate is lower, the environmental benefit remains.

What to watch for: Some states offer additional incentives for renewable energy generation (e.g., green certificates). Check with your DISCOM for any extra benefits.

5. Dual‑tariff consumer (day‑night tariff)

Profile: Has a commercial‑type tariff where daytime rates are higher than night rates, and consumes heavily during the day.

Best model: Net metering or net billing depending on state policy. With net metering, daytime generation can offset high‑rate consumption, leading to larger bill reductions. If net metering isn’t permitted, net billing still offers a credit that can be applied to the higher daytime charges.

What to watch for: Review the tariff structure carefully. Some DISCOMs apply the credit at the average tariff, which may dilute the benefit of offsetting high‑rate daytime usage.

6. Homeowner planning future expansion (e.g., electric vehicle charger)

Profile: Currently consumes 250 kWh/month, plans to add an EV charger that will double daytime load within two years.

Best model: Net metering now, with a system sized for future demand. Selecting a slightly larger capacity (within the state‑specific cap) ensures that once the EV charger is installed, the excess generation continues to offset the higher load.

What to watch for: Some states cap the system size relative to the sanctioned load. Ensure the future load projection is included in the initial application to avoid re‑approval later.

7. Rural homeowner with agricultural load

Profile: Uses a pump for irrigation during early mornings and evenings, with a moderate household load.

Best model: Gross metering often works better in rural settings where the DISCOM may have a fixed purchase price for agricultural export. The homeowner can earn revenue from the pump’s daytime operation while still paying for household consumption.

What to watch for: Verify if the DISCOM offers a separate agricultural tariff or purchase price for exported power, and whether a net meter can be installed on a mixed‑use connection.

8. Consumer interested in virtual net metering

Profile: Lives in a multi‑family building and wants to share the benefit of a single solar installation across several units.

Best model: Virtual net metering (a policy offered by a few states). Though not directly a settlement model, it allows the exported energy to be credited across multiple consumer accounts.

What to watch for: Check the state’s SERC guidelines for virtual net metering eligibility. For more details, read our article on Virtual Net Metering Explained for Indian Consumers.

9. Commercial/industrial consumer looking for large‑scale rooftop solar

Profile: A small manufacturing unit with a 100 kW rooftop system, high daytime load, and interest in both bill reduction and revenue.

Best model: Net billing is common for commercial‑scale systems in many states, offering a credit at a discounted rate while still allowing a sizeable portion of the load to be met directly. Some states may permit gross metering for larger capacities, providing a direct purchase price for excess generation.

What to watch for: Review the specific commercial guidelines. Our dedicated guide on Net Metering for Commercial & Industrial Consumers in India provides deeper insights.

10. First‑time solar buyer unsure how to start

Profile: Interested in rooftop solar but confused about the application steps.

Best model: Depends on state policy, but the recommended first step is to understand the settlement model that your DISCOM offers. Then, engage a certified installer who can prepare the paperwork.

What to watch for: Follow a clear, step‑by‑step process to avoid delays. Our practical guide, How to Apply for Net Metering in India: Step‑by‑Step, walks you through the entire journey from initial inquiry to final commissioning.

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Integrating the right software for installers

For installers handling multiple projects across different states, juggling varied settlement models, subsidy calculations, and GST compliance can become cumbersome. A unified platform that automates proposal generation, integrates state‑specific subsidy tables, and tracks the end‑to‑end installation workflow reduces errors and speeds up approvals. SolarSwytch offers such a solution, enabling installers to focus on delivering the most suitable net‑metering, gross‑metering, or net‑billing configuration for each homeowner.

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Bottom line

Choosing the right settlement model is not a one‑size‑fits‑all decision. It hinges on:

• Your daily consumption pattern (day vs night, work‑from‑home, EV charging).
• The availability of battery backup (for anti‑islanding safety and power‑cut resilience).
• The state‑specific rules set by the SERC and implemented by the DISCOM.
• Future load expansions you anticipate (e.g., EV charger, air‑conditioners).

By mapping your household’s unique profile to the appropriate model—net metering, gross metering, or net billing—you can maximise financial returns, ensure reliable power, and contribute to India’s renewable energy goals.

Net Metering Gross Metering Net – Step‑by‑Step Roadmap for Indian Homeowners

Installing a rooftop solar system and figuring out how you will be paid for excess power can feel overwhelming. The following roadmap walks you through every major milestone, from the first idea to a working system that shows a tidy bill every month. The steps are written in plain language and follow the typical process used by most state electricity regulatory commissions (SERCs) and distribution companies (DISCOMs) across India.

1. Assess Your Energy Needs

   • Look at the past 12 months of electricity bills. Note the highest monthly consumption (in kWh) and the average daily usage.
   • Decide how much of that load you want to cover with solar. Most homeowners aim for 30‑70 % of their demand, balancing upfront cost and savings.

2. Check Local Regulations

   • Visit your state’s electricity regulatory commission (SERC) website or contact the local DISCOM to learn the current net metering, gross metering, or net‑billing rules.
   • Verify whether your property is eligible for net metering (most residential rooftops are) and note any caps on system size relative to your sanctioned load.

3. Choose a Qualified Installer

   • Select an installer who is registered with the DISCOM and has experience handling the paperwork for net metering applications.
   • Ask the installer to perform a site‑survey: roof orientation, shading, structural strength, and available area.

4. Pre‑Design and Proposal Generation

   • The installer creates a solar design (kW rating, panel layout, inverter size).
   • Using a proposal generator, the installer prepares a detailed quotation that includes equipment cost, installation labour, GST, and any applicable government subsidies.
   • Tip: Look for a proposal that automatically factors in the subsidy and GST calculations – this saves you time and avoids manual errors.

5. Application Submission to DISCOM

   • Submit the application form along with the technical design, land‑use permission (if required), and the signed net‑metering agreement draft.
   • Some states allow online submission; others require a physical copy at the DISCOM office.

6. Feasibility and Sanction

   • The DISCOM conducts a feasibility check: they verify the design, confirm that the system size respects the state‑wise cap, and assess the impact on the local grid.
   • If everything checks out, the DISCOM issues a sanction letter and an agreement that outlines the terms of net metering, gross metering, or net billing for your connection.

7. Installation of Solar Hardware

   • The installer mounts the panels, installs the inverter, and connects the DC side to the AC side.
   • If you want backup during power cuts, discuss a hybrid inverter with battery storage; otherwise a standard grid‑tied inverter will automatically shut down during outages (anti‑islanding safety).

8. Bidirectional (Net) Meter Installation

   • After the system is mechanically complete, the DISCOM sends a technician to install a bidirectional meter at your premises.
   • This meter records both the electricity you draw from the grid and the surplus you export back. In states that use gross metering, a separate export meter may be installed.

9. Commissioning and Testing

   • The installer powers up the system, checks the inverter logs, and ensures the meter is communicating correctly with the DISCOM’s supervisory system.
   • A commissioning report is prepared and submitted to the DISCOM for final acceptance.

10. Signing the Net‑Metering Agreement

    • Once the DISCOM verifies the commissioning report, you sign the final agreement.
    • The agreement specifies the settlement model (net metering, gross metering, or net billing), the credit period (usually monthly), and the procedure for any disputes.

11. First Bill and Credit Cycle

    • Your next electricity bill will reflect the net consumption. If you exported more than you imported during the billing period, the surplus credit will appear as a reduction in the current or next month’s bill.
    • Under gross metering, you receive a fixed tariff for every kilowatt‑hour exported, and the credit appears as a separate line item.

12. Monitoring and Maintenance

    • Modern inverters come with a web portal or mobile app that shows real‑time generation, consumption, and export figures.
    • Schedule periodic cleaning of panels and a yearly performance check with your installer to keep the system operating at peak efficiency.

13. Utilise Available Subsidies and Incentives

    • Many state governments offer additional subsidies for residential solar. Keep receipts of the installation and submit them to the relevant authority to claim the rebate.
    • The GST on solar equipment is 5 % (instead of the standard 18 %). Ensure your invoice reflects this reduced rate.

14. Explore Advanced Options (Optional)

    • Virtual Net Metering: If you have a shared solar garden with neighbours, you can allocate generated energy to multiple meters. Learn more in the article “Virtual Net Metering Explained for Indian Consumers”.
    • Commercial & Industrial Net Metering: Larger loads follow a slightly different set of rules. See “Net Metering for Commercial & Industrial Consumers in India” for details.

15. Stay Informed About Policy Changes

    • The SERCs periodically revise metering rules, tariff rates, and subsidy schemes. Subscribe to newsletters or follow your DISCOM’s announcements to stay updated.

By following this roadmap, you can confidently navigate the paperwork, technical steps, and regulatory nuances that accompany rooftop solar in India. The process may seem long, but each step builds on the previous one, ultimately delivering clean, cost‑saving electricity for your home.

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The information above reflects the regulatory environment as of March 2026. No later policy changes are considered.

Illustrative Example

Below is a detailed, fictional case study that demonstrates how net metering, gross metering, and net billing work in practice for an Indian homeowner. The numbers are illustrative only and follow the generic rules that apply across most states.

Homeowner Profile

• Name: Ramesh Sharma
• Location: A mid‑size city in a southern Indian state
• Sanctioned load: 5 kW (as per the electricity connection)
• Monthly electricity consumption: 350 kWh (average)

Proposed Solar System

• Size: 3 kW rooftop PV (approximately 12 m²)
• Expected annual generation: 3 kW × 1 500 kWh/kW ≈ 4 500 kWh (≈ 375 kWh per month)

Scenario A – Net Metering (Typical Residential Model)

1. Month‑by‑Month Energy Flow

   • January: Consumed 320 kWh, generated 380 kWh. Exported 60 kWh to the grid.
   • February: Consumed 340 kWh, generated 360 kWh. Exported 20 kWh.
   • March: Consumed 360 kWh, generated 340 kWh. Imported 20 kWh.

2. Bill Calculation

   • The DISCOM charges Rs 5 per kWh for consumption.
   • Exported energy is credited at the same rate (one‑to‑one offset).
   • January bill: (320 kWh – 60 kWh) × Rs 5 = Rs 1 300.
   • February bill: (340 kWh – 20 kWh) × Rs 5 = Rs 1 600.
   • March bill: (360 kWh – 0 kWh) ×��Rs 5 = Rs 1 800 (no export credit).

3. Result

   • Over three months, Ramesh’s net consumption drops from 1 020 kWh to 720 kWh, saving roughly Rs 1 500 in total.

Scenario B – Gross Metering (Common for Small Commercial Loads)

1. Energy Flow

   • The DISCOM measures export separately and pays a fixed tariff of Rs 3 per kWh for every kilowatt‑hour sent to the grid, regardless of the consumer’s own usage.

2. Bill Calculation (same monthly generation as above)

   • January: Consumed 320 kWh × Rs 5 = Rs 1 600. Exported 60 kWh × Rs 3 = Rs 180 credit. Net bill = Rs 1 420.
   • February: Consumed 340 kWh × Rs 5 = Rs 1 700. Exported 20 kWh × Rs 3 = Rs 60 credit. Net bill = Rs 1 640.
   • March: Consumed 360 kWh × Rs 5 = Rs 1 800. Exported 0 kWh = Rs 0 credit. Net bill = Rs 1 800.

3. Result

   • The credit per kWh is lower than the consumption tariff, so the overall savings are smaller than in net metering, but the homeowner still benefits from a steady income for every unit exported.

Scenario C – Net Billing (Hybrid Model)

1. Energy Flow

   • Exported energy is settled at a pre‑determined “billing” rate, often lower than the consumption rate but higher than the gross‑metering tariff. Assume Rs 4 per kWh export.

2. Bill Calculation

   • January: Consumption cost = 320 × 5 = Rs 1 600. Export credit = 60 × 4 = Rs 240. Net bill = Rs 1 360.
   • February: Consumption = 340 × 5 = Rs 1 700. Export credit = 20 × 4 = Rs 80. Net bill = Rs 1 620.
   • March: Consumption = 360 × 5 = Rs 1 800. No export credit. Net bill = Rs 1 800.

3. Result

   • Net billing offers a middle ground: the export rate is better than gross metering but not as generous as a full one‑to‑one offset.

Common Elements Across All Scenarios

• Anti‑islanding safety: In every case, the inverter automatically shuts down during a grid outage unless a battery or hybrid inverter is installed. This protects utility workers and prevents back‑feeding.
• Bidirectional meter: A net (or bidirectional) meter records both import and export, enabling accurate settlement.
• State‑wise variation: The exact credit rates, caps, and eligibility criteria differ from state to state. Homeowners should always consult their local SERC or DISCOM.

Visual Summary

The diagram above shows the flow of electricity and the financial settlement under each model.

Key Takeaways for Ramesh

• If his state permits net metering, the one‑to‑one offset yields the highest bill reduction.
• Gross metering guarantees a fixed income for export, useful for budgeting but offers lower overall savings.
• Net billing balances the two, delivering a modest credit while still rewarding excess generation.

Ramesh should verify which model his DISCOM supports, review the applicable tariff tables, and decide based on his financial goals. For a deeper dive into the application process, see “How to Apply for Net Metering in India: Step‑by‑Step”.

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All figures are illustrative and do not represent any actual consumer’s bill.

Alternatives and Comparison – Choosing the Right Settlement Model

When a rooftop solar system is connected to the grid, the electricity you generate can be settled in three principal ways: net metering, gross metering, and net billing. While the technical hardware (panels, inverter, wiring) remains the same, the financial outcome varies considerably. Below is a comparison that helps Indian homeowners decide which model aligns best with their needs.

Feature	Net Metering	Gross Metering	Net Billing
How Export is Valued	One‑to‑one offset against consumption (same rate)	Fixed export tariff (usually lower than consumption rate)	Fixed export tariff that is higher than gross‑metering but lower than consumption rate
Typical Beneficiary	Residential owners with moderate to high self‑consumption	Small commercial or industrial users where DISCOM prefers a separate export payment	Consumers in states that have introduced a hybrid policy to balance grid stability and incentives
Metering Equipment	Bidirectional (net) meter that records both import and export	Separate export meter or a gross‑metering arrangement; import may still be measured	Same bidirectional meter as net metering; settlement logic differs
Impact on Monthly Bill	Bill reduces by the exact amount of exported kWh	Bill reduced by a monetary credit (export kWh × fixed rate)	Bill reduced by credit at the net‑billing rate; may still show a small payable amount
Incentive for Over‑Generation	Strong – excess generation directly reduces the next bill	Moderate – credit is limited to the fixed tariff, may be less attractive	Moderate – better than gross but not as strong as net
Regulatory Preference	Most states favour this for residential rooftop solar	Some states reserve gross metering for larger or commercial systems	Emerging in a few states as a compromise
Effect During Power Cuts	Inverter shuts down (anti‑islanding) unless battery‑backed	Same safety behaviour; no export during outage	Same safety behaviour
Complexity of Settlement	Simple – same rate for import and export, easy to understand	Requires knowledge of two different rates (consumption vs export)	Slightly more complex – two rates but still straightforward
Best for	Homeowners seeking maximum bill savings and who can size the system close to their load	Businesses that want predictable export income regardless of consumption pattern	Consumers who want a balance between guaranteed export income and some offset on consumption

When to Prefer Net Metering

• Your state’s SERC allows net metering for residential connections.
• You aim to offset a large portion of your electricity bill.
• You have a relatively flat consumption pattern (e.g., daytime usage aligns with solar generation).

When Gross Metering May Be More Suitable

• Your DISCOM only offers gross metering for systems above a certain size.
• You prefer a stable, known revenue per kWh exported, useful for financial planning.
• Your consumption is low compared to generation, meaning you would export most of the energy anyway.

When Net Billing Provides a Good Middle Ground

• Your state introduced net billing to encourage solar while maintaining grid revenue.
• You want a better export rate than gross metering but cannot get full net‑metering benefits.
• You have a mixed load profile (high evening usage) and want some bill reduction without relying solely on export credits.

Practical Tips for Homeowners

1. Check State‑Specific Rules – The settlement model is dictated by the SERC and DISCOM. Visit their websites or contact customer service.
2. Calculate Expected Export – Use a solar calculator or ask your installer to model monthly generation versus consumption.
3. Factor in GST and Subsidies – The GST on solar equipment is 5 %; many states provide a capital subsidy that can reduce the upfront cost.
4. Consider Future Load Changes – If you plan to add an electric vehicle charger or upgrade appliances, a net‑metering system may give you more flexibility later.

Linking to Further Reading

• For a deeper dive into how virtual metering works for shared rooftops, read “Virtual Net Metering Explained for Indian Consumers”.
• Commercial and industrial users have a separate set of guidelines; explore “Net Metering for Commercial & Industrial Consumers in India”.

Closing Thought

Choosing between net metering, gross metering, and net billing is not just about the numbers on a bill; it’s about aligning the settlement model with your consumption habits, financial goals, and the regulatory environment of your state. By understanding the core differences outlined above, you can make an informed decision that maximizes the benefits of your rooftop solar investment.

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The comparison reflects the general regulatory landscape as of March 2026.

Net Metering Gross Metering Net — rules, compliance and regulations

Compliance is the backbone of a smooth rooftop solar installation. While the exact numbers differ across states, the overall regulatory framework follows a common pattern.

1. Eligibility and Capacity Caps

• Eligibility: Indian homeowners and businesses with a valid electricity connection can apply. The applicant must own the property or have written permission from the owner.
• Capacity Limits: Each state’s SERC defines a maximum system size relative to the sanctioned load of the consumer. Residential caps are usually a percentage of the sanctioned load, while commercial caps can be higher. Check your local SERC’s circular for the exact figure.

2. Application Procedure

1. Pre‑application: Gather site details, load data, and ownership documents.
2. Submission: Fill the DISCOM’s online or offline application form. Many installers use SolarSwytch to generate a compliant proposal that includes subsidy calculations.
3. Feasibility Review: The DISCOM conducts a site inspection and verifies that the proposed capacity complies with state caps.
4. Agreement Signing: A net‑metering, gross‑metering, or net‑billing agreement is signed, specifying the settlement model, tariff, and meter type.
5. Meter Installation: The DISCOM installs a bidirectional (net) meter for net models or a separate generation meter for gross models.
6. Commissioning: After inspection, the system is energized and begins operation.

3. Metering and Settlement

• Bidirectional Meter: Records both import and export for net metering and net billing. The DISCOM reads it monthly to settle the net balance.
• Separate Generation Meter: Used in gross metering to measure only the power exported to the grid.
• Billing Cycle: Settlements are typically done on a monthly basis, though some DISCOMs allow quarterly or annual reconciliation.

4. Anti‑Islanding Requirement

All grid‑tied rooftop systems must incorporate anti‑islanding protection. This means the inverter automatically disconnects the solar plant from the grid during a power outage, preventing unsafe back‑feeding. Only systems equipped with battery storage or hybrid inverters can continue to supply power to the home during an outage.

5. Regulatory Bodies

• State Electricity Regulatory Commissions (SERCs): Frame the rules, capacity caps, and tariff structures for each state.
• Distribution Companies (DISCOMs): Implement the rules, install meters, and handle billing.
• Ministry of New and Renewable Energy (MNRE): Provides overall policy direction and oversees subsidy schemes.

6. Documentation Checklist

• Property ownership or consent letter
• Latest electricity bill
• Load assessment report
• Signed net‑metering/gross‑metering/net‑billing agreement
• Technical specifications of the solar plant (capacity, inverter type, etc.)
• Insurance cover for the installation (optional but recommended)

7. Compliance Tips

• Stay Updated: SERC regulations can change; regularly check the official portal or consult your installer.
• Use Accurate Proposals: Leveraging a platform like SolarSwytch helps generate proposals that factor in the latest subsidy rates and GST, reducing the chance of re‑work.
• Maintain Records: Keep all agreements, meter reading copies, and payment receipts for at least five years, as DISCOMs may request them for audits.

By following these steps and staying aware of the settlement model that applies to your location, you can ensure a hassle‑free experience and maximise the financial benefits of your rooftop solar system.

Frequently Asked Questions

1. What is net metering and how does it work for a home rooftop system?

Net metering allows a residential solar owner to send excess electricity back to the grid through a bidirectional meter. The DISCOM records the exported kilowatt‑hours and credits them against future consumption, reducing the next electricity bill. The process is regulated by the state’s SERC, so the exact credit mechanism may vary.

2. How is gross metering different from net metering?

Under gross metering, every kilowatt‑hour generated by your rooftop system is sold to the DISCOM at a predetermined rate, regardless of your own consumption. You do not receive a kWh credit on your bill; instead you receive a monetary payment for the total generation.

3. What does net billing mean?

Net billing is a hybrid model where exported power is valued at a set rate and the value is applied as a monetary credit on your electricity bill. Unlike pure net metering, the credit is not a one‑to‑one kWh offset but a cash amount that reduces the bill.

4. Which model applies to my state?

The applicable model—net metering, gross metering, or net billing—is decided by the State Electricity Regulatory Commission (SERC) and the local DISCOM. You should check with your DISCOM or the relevant SERC website for the latest guidelines.

5. Do I need a special meter for net metering?

Yes. A bidirectional (net) meter is installed by the DISCOM after your application is approved. This meter records both the electricity you draw from the grid and the surplus you export.

6. Can I install a solar system without a battery and still get power during outages?

Grid‑tied systems automatically shut down during a grid failure to prevent islanding. Without a battery or a hybrid inverter, you will not have power during outages. Some states allow battery‑backed systems to continue feeding power, but this is subject to additional approvals.

7. How long does the net metering application process take?

The timeline varies by DISCOM, but generally it involves: application submission, feasibility check, agreement signing, meter installation, and commissioning. Most DISCOMs aim to complete the process within 30‑60 days, though delays can occur.

8. Is there a limit on the size of a residential solar system?

Each state sets its own cap on the maximum capacity that can be connected under net metering, often expressed as a percentage of the sanctioned load. The exact figure differs, so you must refer to your state’s SERC guidelines.

9. What happens to the surplus energy I generate at night?

Since rooftop solar produces power only during daylight, any surplus generated is exported to the grid in real time. At night, you draw power from the grid as usual, and any earlier credits are applied according to the settlement model.

10. Will I receive a bill if my net export exceeds my consumption?

Under net metering, excess export is usually carried forward as a credit to the next billing cycle rather than resulting in a payment. Under gross metering, you receive a payment for all generated kWh, even if it exceeds consumption.

11. How are subsidies and GST handled in a net metering proposal?

When a solar installer prepares a proposal, the applicable government subsidy and GST are calculated on the equipment cost. The installer’s software can automatically apply the correct rates, ensuring the final price reflects these incentives.

12. Can I switch from net metering to gross metering later?

Switching models typically requires a new application and approval from the DISCOM, as the settlement terms are tied to the original agreement. You would need to follow the same procedural steps as the initial application.

13. Are there any penalties for exceeding the approved capacity?

Exceeding the sanctioned capacity without permission can lead to penalties, disconnection, or the need to re‑apply for a higher limit. Compliance with the approved agreement is essential to avoid regulatory issues.

14. How is the electricity bill calculated under net billing?

Your bill includes the regular consumption charge minus the monetary credit earned from exported power. The credit rate is set by the DISCOM and may be lower than the retail tariff, so the bill reduction varies.

15. Do I need to pay any upfront fees for the net meter?

Some DISCOMs charge a one‑time installation fee for the bidirectional meter, while others may waive it as part of a promotion. The fee, if any, is communicated during the agreement stage.

16. What documentation is required for the application?

Typical documents include proof of ownership or tenancy, a site plan, the solar system’s single‑line diagram, inverter specifications, and the installer’s registration details. Exact requirements differ by DISCOM.

17. Can I install solar on a rented apartment?

Yes, provided the landlord gives written permission and the DISCOM approves the connection. Some states require the property owner to be the account holder for the net metering agreement.

18. How does net metering affect my property tax?

In most states, rooftop solar installations are considered a capital improvement and may increase the assessed value of the property, potentially impacting property tax. However, many states also offer rebates or exemptions for renewable energy installations.

19. Is there any limit on how many times I can export power in a month?

There is no limit on the number of export events; the total exported kWh over the billing period is what matters. The DISCOM records the cumulative export through the bidirectional meter.

20. What maintenance is required for a net‑metered system?

Regular cleaning of panels, inverter health checks, and periodic inspection of wiring are recommended. The installer should also verify that the net meter remains functional and accurately records flows.

21. Can I combine net metering with a battery storage system?

Yes. Adding a battery allows you to store excess daytime generation for use during evenings or outages. The system can be configured to export only when the battery is full, optimizing self‑consumption.

22. Where can I find a step‑by‑step guide to apply for net metering?

Our detailed article “How to Apply for Net Metering in India: Step‑by‑Step” walks you through every stage, from paperwork to commissioning, making the process easier to navigate.

Conclusion

Choosing the right settlement model—net metering, gross metering or net billing—can significantly influence the financial return of your rooftop solar investment. While net metering offers a straightforward kWh credit that directly reduces future bills, gross metering provides a predictable cash payment for every unit generated, and net billing sits somewhere in between with monetary credits. Because each state’s SERC and DISCOM set their own rules, it is essential to verify the applicable model, capacity limits, and tariff rates before you finalize your system design.

Understanding the application workflow—starting with the DISCOM’s feasibility check, moving through agreement signing, bidirectional meter installation, and finally commissioning—helps you avoid surprises and keeps the project on schedule. Remember that grid‑tied inverters will shut down during power cuts for safety; if uninterrupted power is a priority, consider adding a battery or a hybrid inverter.

For Indian homeowners, the key steps are: assess your roof’s solar potential, choose an experienced installer who can generate subsidy‑aware proposals, submit the required documents to your DISCOM, and monitor the net meter once the system is live. Modern installer software platforms streamline this whole journey, from lead capture on WhatsApp to GST‑calculated quotations, enabling a smoother experience for both the installer and the homeowner.

If you are ready to explore solar for your home, start by reviewing the guidelines for your state’s net metering policy and use our resources to guide you through the process. A well‑planned system, paired with the right regulatory model, can pay for itself over time while contributing to a greener grid.

For more hands‑on help, you can explore how installer‑focused tools simplify the entire workflow—SolarSwytch’s operating system brings together CRM, proposal generation, subsidy calculations and installation tracking in one place, eliminating the need for scattered spreadsheets.

Take the first step today: evaluate your energy consumption, check the net metering rules in your state, and reach out to a certified installer who can guide you through the application and installation phases. Your rooftop could soon be generating clean, affordable power for years to come.