How Net Metering Works in India: A Complete Guide
Net metering is the single biggest reason rooftop solar makes financial sense for most Indian households — yet it's also one of the most misunderstood parts of going solar. This guide breaks down exactly how it works, how your electricity bill changes after installation, and what to expect during the DISCOM approval process.
How Your Bill Actually Changes
Before solar, your electricity bill simply reflects every unit you consume from the grid. After net metering is installed, your bill reflects the net difference between what you drew from the grid and what you exported to it over the billing cycle. If your solar system generates more than you consume in a given month, some DISCOMs carry the surplus credit forward to the next bill, while others settle it annually — this varies by state, so it's worth checking your specific DISCOM's policy.
For a typical household that sizes its solar system to roughly match its average consumption, this usually means bills drop by 70–90%, often down to just the fixed monthly charge that DISCOMs levy regardless of consumption. Businesses and larger consumers with high daytime usage — offices, shops, and factories that operate mostly during daylight hours — tend to see even higher savings, since more of the solar power is consumed directly rather than exported.
Getting Your Net Meter Installed
Once your solar installation is physically complete, your installer submits an application to the local DISCOM for net metering. The DISCOM typically sends an inspector to verify the installation meets safety and technical standards — checking things like proper earthing, correct wiring, and that the inverter is a certified, grid-compliant model. This inspection usually happens within 1–3 weeks of the application, though timelines vary by state and how busy the local DISCOM office is.
Once approved, the DISCOM replaces your existing meter with a bi-directional net meter, which is capable of recording both the electricity you import from the grid and the electricity you export to it. From this point on, your solar system is officially connected to the grid and your billing shifts to the net consumption model. Most states require you to sign a formal net metering agreement with the DISCOM before this happens, laying out the terms — including, in most states, a cap on system size relative to your sanctioned electricity load (commonly, your solar capacity can't exceed your sanctioned load).
A detail that surprises many first-time solar owners: some states cap how much surplus export credit carries forward, and unused credit at the end of a financial year in some states is settled at a lower rate than the retail tariff (or forfeited entirely, depending on state regulations). This is one reason installers generally recommend sizing your solar system close to — rather than significantly larger than — your actual annual consumption, since generating a large surplus you can't fully monetise reduces the overall return on your investment.
How Net Metering Works
Net metering is the billing arrangement that makes rooftop solar financially worthwhile for most Indian households and businesses. Once your solar system is installed, the DISCOM replaces your regular meter with a bi-directional net meter that can measure electricity flowing both ways — the power you draw from the grid, and the surplus solar power you export back to it.
During the day, your solar panels generate electricity that first powers whatever appliances are running in your home or business. Any extra power your panels produce beyond what you're using gets exported to the grid, and the net meter records this as a credit. In the evening or on cloudy days, when your panels aren't generating enough, you draw power back from the grid as usual. At the end of the billing cycle, you're only charged for the net units consumed — total units drawn from the grid minus total units exported to it.
This means the grid effectively acts as a free "battery" for your solar system during the day, and you only pay the DISCOM for the shortfall. For most homes with a well-sized rooftop system, this can bring monthly electricity bills down by 70–90%, and in some cases reduce them to the fixed minimum charge only.
What Is the PM Surya Ghar Muft Bijli Yojana?
Launched by the Government of India in February 2024, the PM Surya Ghar Muft Bijli Yojana is the country's flagship scheme for residential rooftop solar. Its goal is to get solar panels onto one crore (10 million) homes, and it does this by offering a direct subsidy — called Central Financial Assistance (CFA) — straight into the homeowner's bank account after installation, rather than routing it through the installer.
Under the scheme, households can get a subsidy of ₹30,000 per kW for the first 2 kW of capacity, and ₹18,000 per kW for the next 1 kW (i.e., the 2–3 kW slab), capped at a maximum of ₹78,000 for systems of 3 kW or larger. A household installing a 3 kW system, for example, can expect to receive close to ₹78,000 back from the government, substantially reducing the net cost of going solar.
To apply, homeowners register on the national portal (pmsuryaghar.gov.in), select their state and electricity distribution company (DISCOM), and choose an empanelled vendor to carry out the installation. Net metering is arranged through the DISCOM once installation is complete and inspected, after which the subsidy is credited directly to the applicant's bank account — usually within 30 to 45 days of a successful net-meter installation.
Cost and Payback Period
The cost of a rooftop solar system in India varies with system size, panel and inverter brand, roof type, and installation complexity, but as a rough benchmark, a good-quality on-grid residential system typically costs between ₹50,000 and ₹65,000 per kW before subsidy, using Tier-1, DCR-compliant components. After applying the government subsidy under PM Surya Ghar (up to ₹78,000 for a 3 kW system), the net out-of-pocket cost drops meaningfully.
Payback period — the time it takes for your electricity bill savings to equal your net investment — usually works out to between 3 and 6 years for most residential and commercial systems in India, depending on your local electricity tariff, how much of your solar generation you self-consume versus export, and how well the system is sized to your actual usage pattern. After the payback period, the electricity generated is essentially free for the remaining 18–22 years of the panel's rated life, making solar one of the few home investments that pays for itself and then keeps paying dividends.
Documents and Application Process
Applying for solar subsidy in India, whether under PM Surya Ghar for residential rooftops or PM-KUSUM for agricultural applications, generally requires a similar set of documents: proof of identity (Aadhaar card), proof of address, a recent electricity bill showing your consumer/connection number, proof of property ownership or a no-objection certificate if you're a tenant, and bank account details (for the subsidy to be credited directly).
The typical process starts with online registration on the relevant government portal, followed by selecting your state, DISCOM, and an empanelled installer. The installer conducts a site survey, submits a technical feasibility report to the DISCOM, and — once approved — carries out the installation. After installation, the DISCOM inspects the site and installs the net meter, following which the subsidy amount is disbursed directly to the applicant's registered bank account, typically within 30 to 45 days of the net meter going live.
Why Solar Makes Sense in India
India receives an average of 300 sunny days a year and among the highest solar irradiance levels in the world, which is precisely why the country has made solar power a cornerstone of its energy policy. For homeowners and businesses, this translates into a straightforward proposition: install a solar system once, and it keeps generating free electricity from sunlight for the next 25 years or more, dramatically cutting down what you pay to the grid.
Rising electricity tariffs, frequent hikes by state electricity boards, and the volatility of diesel prices for backup power have made solar an increasingly obvious financial decision, not just an environmental one. Combined with central and state government subsidies, the payback period on a typical residential or commercial rooftop solar system in India today ranges between 3 to 6 years, after which the electricity generated is effectively free for the remaining life of the system.
Beyond the financial case, solar also insulates households and businesses from unplanned power cuts, voltage fluctuations, and the uncertainty of grid supply in many semi-urban and rural parts of the country — a benefit that's often just as valuable as the money saved.
Maintenance and Lifespan
One of solar power's biggest practical advantages is how little maintenance it needs. With no moving parts, solar panels typically require nothing more than periodic cleaning to remove dust, bird droppings, and pollen that can reduce output — in most parts of India, cleaning once every 2–4 weeks (more frequently during dry, dusty months, less during and after the monsoon) is enough to keep output close to optimal.
Panels themselves are extremely durable, typically carrying a 25-year performance warranty guaranteeing they'll still produce at least 80–85% of their original rated output after a quarter century — degradation of roughly 0.5–0.8% per year is normal and expected. Inverters have a shorter lifespan than panels, typically needing replacement once every 10–15 years, so it's worth factoring this into your long-term cost calculations. Beyond cleaning and an occasional visual inspection for loose wiring or physical damage, a well-installed solar system needs very little hands-on attention to keep delivering reliable output year after year.
Common Myths, Busted
A persistent myth is that solar panels don't work on cloudy or rainy days — in reality, panels still generate electricity from diffused sunlight on overcast days, just at a reduced output (typically 10–25% of peak capacity), and India's overall annual sunshine is more than enough to make solar worthwhile even accounting for the monsoon months. Another common misconception is that solar panels require constant maintenance or frequent replacement — as covered above, the reality is closer to occasional cleaning with a 25-year usable life.
Many people also believe solar is only viable for large houses or businesses with big roofs, but modern high-efficiency panels mean even a modest 1–2 kW system on a small rooftop can meaningfully cut a household's electricity bill. Finally, there's a widespread assumption that solar installation is prohibitively expensive — while the upfront cost is real, government subsidy schemes, falling equipment prices, and financing options available through most installers have brought solar within reach of a much wider range of households than most people assume.
Frequently Asked Questions
Is net metering the same across all Indian states?
The core concept is the same everywhere, but specific rules — like maximum system size relative to sanctioned load, how unused export credit is settled, and application timelines — vary by state and DISCOM. Your installer should be familiar with your specific DISCOM's rules.
What happens to unused solar credit at the end of the year?
This depends on the state — some carry it forward indefinitely, some settle it annually at a fixed rate, and some forfeit unused credit. It's worth asking your installer or checking your state's net metering regulations directly.
Can I install net metering with a system larger than my sanctioned electricity load?
Most states cap solar capacity at or slightly above your sanctioned load, so oversizing significantly beyond this generally isn't permitted without applying for a higher sanctioned load first.
Do I need to pay for the net meter installation myself?
In most states, the net meter itself is provided by the DISCOM as part of the standard process, though timelines and any nominal charges can vary — your installer will typically clarify this upfront.
How long does the whole net metering process typically take?
From application to a working net meter, most states take 3–6 weeks, assuming no issues with documentation or scheduling delays on the DISCOM's end.
Final Thoughts
Net metering is what turns solar panels from a nice-to-have into a genuinely compelling financial decision — it's the mechanism that lets you "bank" your daytime solar surplus and draw it back at night, effectively using the grid as a free storage buffer. Understanding how it works in your specific state helps you size your system correctly and set realistic expectations for how much your bill will actually drop.
