What is Net Metering

Net Metering Is the Financial Engine of Residential Solar in India

Ask a homeowner why they want solar and the answer is almost always "to reduce my electricity bill." Net metering is the regulatory and technical mechanism that makes that reduction happen. Without a functioning net metering connection, a rooftop solar system is simply a source of daytime electricity with no bill-saving effect beyond what the household consumes in real time.

For an on-grid solar installer, net metering is not just a technical detail, it is the central value proposition in every residential sale you make. This guide covers the definition of net metering, the mechanics of how it works, India's regulatory framework under CERC and SERC, state-by-state tariff differences, the link to PM Surya Ghar, and what you need to know to become the installer customers trust to handle the entire grid connection process.

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What Net Metering Means, The Precise Definition

Net metering is a billing mechanism under which a prosumer (a consumer who also produces electricity) exports surplus solar generation to the distribution grid during the day, and imports electricity from the grid when solar production is insufficient (evenings, cloudy days). The DISCOM installs a bi-directional meter that records both import and export. At the end of the billing cycle (monthly or quarterly depending on state), only the net difference, units imported minus units exported, is billed at the applicable consumer tariff.

If a consumer exports more than they import over the billing cycle, the surplus can be:

• Carried forward as kWh credit to the next month (most states)
• Settled at a Feed-in Tariff (FiT) rate at year end (some states)
• Lapsed (rare, but happens in states with underdeveloped net metering policy)

This is distinct from gross metering, where all solar generation is exported to the grid at a FiT rate, and all household consumption is imported from the grid at the consumer tariff. See our detailed comparison in net metering vs gross metering.

How the Bi-Directional Meter Works

The technical heart of net metering is the bi-directional (or smart) meter. It replaces the consumer's existing single-direction energy meter and records two separate registers:

• Register 1 (Import): Electricity consumed from the grid, measured in kWh
• Register 2 (Export): Electricity sent to the grid from the solar system, measured in kWh

During a sunny day, the solar system typically produces more than the home consumes, the surplus flows backwards through the meter and Register 2 increments. At night, the home imports from the grid and Register 1 increments. The meter does not "spin backwards" in the old mechanical sense, it separately accumulates each direction and the DISCOM reads both registers at billing time.

What the bill looks like:

A customer with a 3 kW solar system in Surat (Gujarat) in June might have:

• Solar generation: 420 kWh
• Direct self-consumption (used at time of generation): 180 kWh
• Export to grid (Register 2): 240 kWh
• Import from grid (Register 1): 160 kWh
• Net bill = 160 kWh imported - 240 kWh exported = -80 kWh (credit)

In DGVCL's net metering policy, the 80 kWh credit carries forward to the next billing month. According to pmsuryaghar.gov.in, over 90% of PM Surya Ghar applicants in Gujarat who install a correctly sized 3 kW system achieve zero net billing from April through September.

The Net Metering Credit Equation

The financial outcome of net metering can be modelled with a single equation, the Net Metering Credit Equation:

Net Monthly Bill = (Import Units × Grid Tariff) − (Export Units × FiT Rate)

Where:

• Import Units = electricity purchased from the grid (kWh)
• Grid Tariff = consumer's applicable slab tariff (₹/kWh)
• Export Units = solar electricity sent to the grid (kWh)
• FiT Rate = Feed-in Tariff, i.e., the rate the DISCOM pays for exported solar energy (₹/kWh)

If the result is negative, the consumer has a net credit. If positive, they owe the DISCOM that amount.

Worked example (Maharashtra, MSEDCL, residential, mid-2026):

• Import units: 200 kWh @ ₹8.50/kWh = ₹1,700
• Export units: 280 kWh @ ₹3.50/kWh (MSEDCL FiT) = ₹980
• Net bill = ₹1,700 − ₹980 = ₹720

Without solar (same 200 kWh imported + would have imported 280 kWh more): bill would have been 480 kWh × ₹8.50 = ₹4,080. Monthly saving: ₹4,080 − ₹720 = ₹3,360/month.

Note: In states where net metering is settled purely on a unit basis (credit at the same tariff rate, not a separate FiT rate), the equation simplifies to: Net bill = (Import Units − Export Units) × Grid Tariff.

India's Net Metering Regulatory Framework

Net metering in India operates under a two-tier regulatory structure:

Central Level, CERC

The Central Electricity Regulatory Commission (CERC) issued the Grid Connected Rooftop and Small Solar Photo Voltaic Systems (CERC) Regulations which provide the national framework for net metering for systems up to 1 MW. CERC's key provisions include:

• Mandatory net metering for systems up to the consumer's sanctioned load
• Bi-directional metering at DISCOM cost (or shared cost, state-specific)
• Settlement of surplus at the end of the financial year
• Anti-islanding and safety requirements for the solar inverter

Access the full regulations at cerc.gov.in.

State Level, SERCs

Each state's State Electricity Regulatory Commission (SERC) implements the CERC framework through state-specific orders that determine:

• The net metering capacity limit per consumer (e.g., Gujarat caps at sanctioned load or 500 kW, Maharashtra caps at 1 MW for LT consumers)
• The Feed-in Tariff rate for surplus export
• The billing settlement period (monthly vs quarterly vs annual)
• Documentation requirements for the net metering application
• Whether surplus credits carry forward or lapse

The MNRE (Ministry of New and Renewable Energy) also issues guidelines that states must follow, particularly for PM Surya Ghar scheme installations. See mnre.gov.in for the latest circulars.

Net Metering vs Gross Metering Regulatory Divide

While CERC recommends net metering, individual SERCs can mandate gross metering for certain consumer categories. Tamil Nadu (TANGEDCO) and Andhra Pradesh have experimented with gross metering for some categories in certain periods. Installers must verify current state policy before advising customers on financial projections. See our full post on net metering vs gross metering for a detailed state-by-state comparison.

State-Wise Net Metering Tariffs and Limits

This is the data that every installer should have at their fingertips. Net metering FiT rates and capacity limits as of mid-2026:

Sources: respective SERC tariff orders, mnre.gov.in, mercomindia.com state tracker, mid-2026. Tariff rates change annually, always verify with the latest SERC order before presenting projections to customers.

Net Metering Capacity Limits Across India

PM Surya Ghar and Net Metering, The Connection

PM Surya Ghar Muft Bijli Yojana is the national scheme providing subsidy for rooftop solar installations, ₹30,000/kW for the first 2 kW, ₹18,000/kW for the third kilowatt (up to 3 kW total, max subsidy ₹78,000 for 3 kW). See our full PM Surya Ghar guide and subsidy calculation guide.

Every PM Surya Ghar installation is, by design, also a net metering application. The scheme requires:

1. The system must be on-grid solar, battery-only systems are not eligible
2. The consumer must obtain a net metering connection from their DISCOM
3. The net metering connection must be active before the final subsidy disbursement is triggered

The application flow (via pmsuryaghar.gov.in) integrates the DISCOM net metering approval workflow directly into the national portal. Once the DISCOM approves and installs the bi-directional meter, the system is commissioned and the subsidy is released to the consumer's bank account within 30 days per government commitment. According to PIB, over 1.2 crore households had applied under PM Surya Ghar by mid-2026.

For installers, this means that your net metering competency directly determines how quickly your customers receive their subsidy, which in turn affects your relationship, referral rate, and payment cycle. See our PM Surya Ghar application process guide for the full workflow.

The Net Metering Application Process, Overview

The full process is covered step by step in our guide on how to apply for net metering in India. Here is the overview:

1. 1
   Installation complete: System is physically installed but NOT energised. All earthing, cabling, and inverter wiring complete.
2. 2
   Application submitted: For PM Surya Ghar, via pmsuryaghar.gov.in. For non-PM Surya Ghar, via DISCOM portal or office. Documents: SLD, earthing certificate, inverter specs, module specs, installation photos.
3. 3
   DISCOM inspection: A DISCOM technical officer visits to inspect the installation for compliance with earthing, anti-islanding, and metering requirements. Timeline: 7–30 days depending on state.
4. 4
   Bi-directional meter installed: DISCOM replaces the existing meter with a bi-directional smart meter. This triggers the start of net metering billing.
5. 5
   System commissioned and net metering agreement signed: The net metering agreement is executed between the consumer and the DISCOM. The installer commissions the system (turns it on).

See typical DISCOM approval timelines for state-by-state benchmark data.

Net Metering vs Gross Metering, Quick Comparison

For the full comparison with financial modelling, read net metering vs gross metering.

Common Customer Misconceptions About Net Metering

Every installer faces these questions from customers. Here are accurate answers:

"My meter will spin backwards and I'll get a negative bill." Modern bi-directional digital meters do not spin backwards. They track import and export separately. The DISCOM will not issue a negative bill, excess credits carry forward to the next month or are settled at year end.

"I need to store my solar energy in a battery." With net metering, the grid acts as your virtual battery. Surplus production is stored as credit on your meter. You do not need physical battery storage for the financial benefit of solar to work. Battery storage adds cost and complexity, for most urban residential consumers with stable grid supply, it is optional.

"I'll get paid for all the electricity my panels produce." Under net metering, you only get credit for surplus production, what you don't use yourself. The self-consumed portion directly offsets your bill at the full grid tariff rate, which is more valuable than the FiT rate. Under gross metering (rare for residential), you export everything, but at the FiT rate, not the retail tariff.

"The DISCOM will disconnect me if I export too much." DISCOMs cannot disconnect you for exporting solar power as long as your system is within the sanctioned load limit and all approvals are in place. However, they can reject a net metering application if the proposed system capacity exceeds the consumer's sanctioned load, a common rejection reason. Always check sanctioned load before sizing.

Benefits for EPC Installers, Net Metering as a Business Strategy

Net metering competency is not just a technical requirement, it is a business differentiator. Here is why installers who own the end-to-end net metering process outperform those who don't:

1. Customer retention through the DISCOM process. The average Indian customer has no idea how to navigate DISCOM bureaucracy. Installers who manage the net metering application on behalf of the customer create a 45–90 day engagement window after installation. During this window, satisfied customers refer friends and family, or become the source of 3–4 additional leads.

2. Upsell opportunities during grid connection. When you're handling paperwork and visiting the DISCOM, you often discover adjacent opportunities: the customer's neighbour is curious, the housing society wants to go solar, the customer's office building needs a quote. Installers who handle net metering generate 30–40% of their new leads from existing installation sites, according to field data from QuickEstimate users.

3. Premium pricing justification. An installer who says "we handle everything including net metering application, DISCOM inspection coordination, and subsidy paperwork" commands a legitimate service premium of ₹5,000–₹15,000 per installation compared to installers who leave these steps to the customer. This premium is real and defensible.

4. Faster subsidy disbursement = faster payment. For PM Surya Ghar projects, many installers structure their payment in tranches, final payment on subsidy receipt. Installers who manage net metering efficiently receive final payment 4–8 weeks faster than those who leave the process to the customer.

Pros and Cons of Net Metering for Your Customers

How QuickEstimate Helps Installers Win More Net Metering Projects

Rohit's EPC team in Surat handles 15–20 installations per month. Before QuickEstimate, tracking which customers were at the "net metering application submitted" stage versus "DISCOM inspection scheduled" stage required a shared WhatsApp group and daily calls to his office team. Things fell through the gaps, customers called asking for status updates, and some DISCOM inspection windows were missed.

QuickEstimate's pipeline management lets Rohit tag every deal with a stage: Lead → Site Survey → Proposal Sent → Order Confirmed → Installation → Net Metering Application → DISCOM Inspection → Commissioned → Subsidy Disbursed. Every team member sees the current stage. Follow-up reminders are automated via WhatsApp.

The proposal generator auto-calculates PM Surya Ghar subsidy based on system size, shows the net installed cost after subsidy, and presents the net metering credit equation as a monthly savings table in the branded proposal PDF. Customers who see the ₹ savings clearly calculated close 40% faster than those who receive an abstract "estimated bill savings" figure.

For solar lead management, QuickEstimate also captures leads from WhatsApp enquiries and website forms, so Rohit's team never loses a referral lead that came in while they were on a DISCOM visit. Book a demo to see how this works in practice.

What to Do This Week

If you're actively selling solar in India but don't yet have a documented net metering workflow, this week is the time to build one. Here is a concrete starting point:

1. List every DISCOM you work with. For each, find the current net metering application form URL, the FiT rate, and the typical inspection timeline. Use our DISCOM net metering list as your starting reference.
2. Create a one-page customer handout explaining the Net Metering Credit Equation with your state's actual ₹/kWh numbers. Use it in every site survey.
3. Add net metering application handling to your proposal as an explicit service line, price it at ₹2,000–₹5,000 per project. Most customers will pay without negotiation.
4. Set up QuickEstimate's pipeline management to track every deal from lead to subsidy disbursement, try it free.
5. Read our step-by-step guide to how to apply for net metering in India and our DGVCL net metering guide if you're operating in Gujarat.

Net metering is not a complication in your sales process. It is the proof that solar works. Installers who treat it as a core competency, not an afterthought, are the ones building sustainable, referral-driven businesses.

Frequently Asked Questions

Q: What is net metering in India? A: Net metering is a billing mechanism that allows rooftop solar consumers to export surplus electricity to the grid and receive a credit against units imported from the grid. Only the net difference (imports minus exports) is billed at the applicable tariff. It is governed nationally by CERC and implemented by state-level SERCs.

Q: Is net metering available for all residential solar systems in India? A: Yes, net metering is available to residential consumers across all major states in India, subject to the system capacity not exceeding the consumer's sanctioned load. The CERC regulations make net metering mandatory for eligible grid-connected systems up to 1 MW capacity.

Q: What is the FiT (Feed-in Tariff) rate for net metering in India? A: FiT rates vary by state. In mid-2026: Gujarat ₹2.25–₹2.65/kWh, Maharashtra ₹3.50/kWh, Karnataka ₹3.56/kWh, Delhi ₹3.00–₹3.50/kWh. These rates are typically lower than the consumer's grid tariff, which is why right-sizing the system to match consumption (rather than maximising export) is financially optimal in most states.

Q: How long does net metering approval take in India? A: Under PM Surya Ghar, the government target is 30 days from application to commissioning. In practice, DISCOM inspection timelines range from 7 days (Gujarat DGVCL) to 45 days (some UP and Bihar DISCOMs). See our DISCOM approval time benchmark for current data.

Q: Can I get net metering without the PM Surya Ghar subsidy? A: Yes. Net metering is available for any on-grid rooftop solar system, regardless of whether the consumer has applied for PM Surya Ghar subsidy. The application goes directly to the DISCOM rather than through the national portal.

Q: What documents are needed for a net metering application? A: The standard documents are: single-line diagram (SLD), module technical specifications, inverter technical specifications, earthing certificate, installation photographs, and the consumer's electricity account details. See our full guide on how to apply for net metering in India.

Q: What happens to excess credits in net metering, do they expire? A: In most Indian states, excess credits carry forward for 12 months. At the end of the financial year (or a defined settlement period), surplus units are settled at the applicable FiT rate and paid to the consumer. Credits do not typically expire mid-year, but the cash settlement date varies by DISCOM.

Q: Is net metering available for commercial solar installations in India? A: Yes, net metering is available for commercial consumers in most states. Capacity limits, FiT rates, and documentation requirements differ from residential. Some commercial consumers above certain capacities are directed to gross metering. Check the state SERC tariff order for your commercial consumer category.

Q: How does net metering affect my electricity bill calculation? A: Use the Net Metering Credit Equation: Net Bill = (Import Units × Grid Tariff) − (Export Units × FiT Rate). If the result is negative, you have a credit for the next month. If positive, that is what you owe. In high-generation months (summer in India), most 3 kW+ systems produce net credits.

Q: What is the difference between net metering and a solar battery system? A: With net metering, the grid acts as your virtual battery, you export surplus during the day and import at night, with billing settled on a net basis. A physical battery stores your own surplus for use at night without grid interaction. Most Indian residential consumers get better financial returns from net metering than from battery storage, given current battery costs and the availability of affordable net metering infrastructure.