Net Metering vs Gross Metering in India

The Two Ways India Prices Solar Electricity

When a solar panel generates more electricity than a home consumes, that surplus has to go somewhere. In India, it goes to the grid, and the policy question is: how is it valued and measured? The answer determines the economics of your customer's solar investment, the right system size, and how you should present payback projections in your proposal.

Two metering models exist in India: net metering and gross metering. They sound similar but produce dramatically different financial outcomes for the consumer. An installer who does not understand the difference will mis-size systems, over-promise savings, and lose credibility when the first electricity bill arrives.

This guide gives you the definitive comparison, real ₹ maths for a 3 kW system, a state-by-state analysis of which model applies where, and the Metering Model Decision Matrix, a two-input framework you can use in any customer conversation to immediately identify the correct recommendation.

Definitions, Net Metering and Gross Metering

Net Metering

Net metering is a billing mechanism under which a solar consumer's surplus generation (production minus real-time consumption) is exported to the grid and credited against the units they import from the grid during the billing period. The meter records both import and export, and the consumer is billed (or credited) on the net difference.

The consumer continues to consume some electricity from the grid (evenings, cloudy days, peak loads), but their bill is reduced by the value of their solar exports. Self-consumed solar is effectively valued at the full retail tariff, the highest possible value for solar electricity.

Gross Metering

Gross metering is a billing mechanism under which all solar generation is exported to the grid at a defined Feed-in Tariff (FiT) rate, and all household consumption is separately imported from the grid at the standard consumer tariff. Two meters are used, or one bidirectional meter configured for gross settlement.

The consumer receives FiT payment for every kWh their panels produce, and pays full tariff for every kWh they consume. There is no netting, exports and imports are completely independent transactions.

Head-to-Head Comparison Table

Parameter	Net Metering	Gross Metering
What is exported	Only surplus (generation − consumption)	100% of solar generation
Rate for self-consumed solar	Avoided retail tariff (highest value)	FiT rate (typically lower)
Metering setup	One bi-directional meter	Two separate meters or bi-directional configured for gross
Optimal system sizing	Match to annual consumption	Maximise generation (if FiT > tariff)
Best for consumer	When grid tariff > FiT rate	When FiT rate ≥ grid tariff
Dominant in India	Yes, all major residential states	Partial, Tamil Nadu, Andhra Pradesh for some categories
Typical residential payback (3 kW)	3.5–5 years	6–9 years
CERC / SERC status	Mandated by CERC for LT consumers	State-level option for HT/commercial

Financial Comparison, 3 kW System at Multiple Tariff Scenarios

To make this concrete, here is a year-1 financial comparison for a 3 kW rooftop system in three different tariff/FiT rate scenarios. Assumptions: 3 kW system, 5 peak sun hours/day, 365 days, 70% self-consumption (30% exported), 1,460 kWh/year generated, 438 kWh exported, 1,022 kWh self-consumed.

Scenario	Grid Tariff	FiT Rate	Net Metering Annual Saving	Gross Metering Annual Income	Winner
Gujarat (DGVCL residential)	₹5.50/kWh	₹2.45/kWh	₹37,000	₹28,470	Net Metering
Maharashtra (MSEDCL residential)	₹8.50/kWh	₹3.50/kWh	₹55,520	₹36,930	Net Metering
Hypothetical: FiT = Grid Tariff	₹7.00/kWh	₹7.00/kWh	₹50,960	₹50,960	Equal
Hypothetical: FiT > Grid Tariff	₹5.00/kWh	₹9.00/kWh	₹36,400	₹65,700	Gross Metering

Net metering annual saving calculation: (Self-consumed kWh × grid tariff) + (Export kWh × FiT rate) = total avoided cost + FiT income. Gross metering annual income calculation: Total generation kWh × FiT rate, minus (all consumption × grid tariff paid separately).

The hypothetical FiT > Grid Tariff scenario has not existed in India for residential consumers at scale since the early JNNSM FiT periods (2010–2014), when FiT rates were set at ₹15–₹18/kWh to incentivise early adoption. Current FiT rates (₹2.25–₹3.56/kWh) are well below even the cheapest residential grid tariff (₹3.50–₹5.00/kWh in lower slabs). This makes net metering the financially correct recommendation for every Indian residential consumer in 2026.

The Metering Model Decision Matrix

The Metering Model Decision Matrix is a two-input tool you can use in any customer conversation or proposal to identify the correct recommendation instantly:

How to use the matrix: Before any customer proposal, look up (1) the consumer's applicable grid tariff slab and (2) the SERC-mandated FiT rate for their DISCOM. Enter both into the matrix. In 2026, for every Indian residential customer you're likely to encounter, the answer is net metering.

Which States Use Which Model

When Gross Metering Might Be Better, Edge Cases

Despite the current Indian tariff environment favouring net metering, there are scenarios where gross metering or a hybrid approach could be considered:

1. Very high self-consumption already. If a consumer runs a home office or small commercial establishment from their home and has very high daytime consumption (80–90% self-consumption), there is little surplus to export anyway. In this case, the difference between net and gross metering outcomes narrows. But net metering is still at least equal, and usually better.

2. Consumers who expect tariff increases. Under net metering, future tariff increases benefit the consumer (their avoided cost per kWh rises). Under gross metering with a fixed FiT rate, future tariff increases hurt the consumer (their import cost rises while their FiT income stays fixed). This is another reason net metering is better for long-term financial certainty.

3. Policy changes. In theory, if the government dramatically increased FiT rates to promote rooftop solar adoption, gross metering could temporarily offer better returns. This is not the direction of current Indian policy, FiT rates have been static or declining as solar costs fall and grid parity improves. Track the latest policy updates at mnre.gov.in and cerc.gov.in.

Regulatory Context, CERC and SERC Framework

The Central Electricity Regulatory Commission (CERC) has mandated net metering for LT consumers under the Grid Connected Rooftop Solar PV Systems Regulations. State Electricity Regulatory Commissions (SERC) implement this through state-specific tariff orders, which also set the FiT rate.

Key regulatory facts:

• CERC regulations require DISCOMs to provide net metering for systems up to the consumer's sanctioned load
• DISCOMs cannot legally refuse net metering to an eligible applicant who meets technical requirements
• MNRE issues annual guidelines reinforcing net metering as the standard for PM Surya Ghar installations
• The CERC framework does not mandate gross metering for any residential category, states that use gross metering for residential consumers are acting outside the CERC recommendations

For complete regulatory references, see cerc.gov.in and mnre.gov.in. For the practical application process, see how to apply for net metering in India.

Impact on System Sizing Advice

The metering model changes how you should size a solar system. This is one of the most practically important implications for installers:

Under net metering (India norm):

• Size the system to match the consumer's annual electricity consumption
• Excess annual generation earns FiT payment but at below-retail rates, oversizing is less efficient per rupee invested
• Right-sizing to consumption achieves the lowest per-unit effective cost of saved electricity
• Example: A customer consuming 400 kWh/month should target a 3–3.5 kW system (which generates ~400–450 kWh/month), not a 5 kW system that generates 650 kWh/month with 250 kWh earning the lower FiT rate

Under gross metering (if ever applicable):

• If FiT rate > grid tariff, maximise system size to generate as much electricity as possible
• Every kWh generated earns the FiT rate, and increasing generation increases income
• Oversizing is desirable in this scenario

This distinction matters practically: in your QuickEstimate proposals, the system size recommendation should be based on annual consumption matching (for net metering), not on roof area maximisation. Customers who receive oversized systems under net metering conditions see longer payback periods and sometimes feel misled.

Pros and Cons Summary

How QuickEstimate Helps

When Rohit's team in Surat builds a proposal for a residential customer, the proposal generator automatically selects net metering (the correct model for Gujarat/DGVCL) and calculates savings using the Net Metering Credit Equation: (self-consumed kWh × grid tariff) + (exported kWh × FiT rate). The customer sees a monthly savings table, not an abstract percentage.

The platform flags if a proposed system capacity exceeds the consumer's sanctioned load, the most common net metering rejection reason, and suggests the correct system size. PM Surya Ghar subsidy is auto-calculated based on pmsuryaghar.gov.in rules, reducing the net cost in the proposal.

For installers managing multiple projects across states with different metering models, QuickEstimate's pipeline management tracks each project's current metering model, application status, and next action. No spreadsheet required. Read about how Indian solar businesses manage leads and proposals at best solar CRM software in India.

For the full net metering application workflow, see how to apply for net metering in India. For a state-by-state DISCOM reference, see our DISCOM net metering list. Book a demo to see the proposal generator in action.

What to Do This Week

1. Look up the FiT rate for every DISCOM you actively work with. Compare it to the average residential tariff in that area. Confirm net metering is the right recommendation (it almost certainly is).
2. Update your proposal templates: if you're projecting savings as "estimated bill reduction X%" without specifying the metering model and the actual FiT rate, you're leaving customers confused and yourself vulnerable to disputes.
3. Read the CERC net metering regulation at cerc.gov.in, the single-page summary of provisions is enough to answer 90% of customer questions.
4. For each state you operate in, bookmark the SERC website and the current tariff order. Set a calendar reminder to check for updates in April each year.
5. See the complete DISCOM net metering list for application forms, fees, and contact details across all major Indian DISCOMs.
6. Review the PM Surya Ghar scheme at pmsuryaghar.gov.in, every PM Surya Ghar installation requires net metering, making the scheme a direct driver of your application volume.
7. Check JMK Research's India solar market reports for the latest state-wise FiT rate data and DISCOM tariff order summaries.
8. For the definitive overview of how net metering works, see what is net metering. For solar cost context, see solar cost per watt India 2026. According to PIB, PM Surya Ghar passed 1.2 crore applications in 2026, nearly all of those are net metering applications in your pipeline.

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Frequently Asked Questions

Q: What is the difference between net metering and gross metering? A: In net metering, only surplus solar (generation minus consumption) is exported to the grid, and the consumer gets a credit against imports, only the net difference is billed. In gross metering, all solar generation is exported at a FiT rate, and all consumption is imported at full retail tariff separately.

Q: Which is better for Indian residential solar consumers, net metering or gross metering? A: Net metering is better for Indian residential consumers in 2026. FiT rates (₹2.25–₹3.56/kWh) are well below grid tariffs (₹5–₹9/kWh). Net metering values self-consumed solar at the higher avoided tariff rate, producing 2–4× better annual financial outcomes than gross metering.

Q: Which states in India use gross metering? A: Most major Indian states use net metering for residential consumers. Tamil Nadu (TANGEDCO) and Andhra Pradesh apply gross metering for certain commercial/HT consumer categories. Residential consumers in these states typically qualify for net metering. Always verify with the current state SERC tariff order.

Q: How does the FiT rate affect my solar system sizing decision? A: Under net metering (FiT rate < grid tariff), right-size the system to match annual consumption. Under gross metering (hypothetically FiT > grid tariff), maximise system size. In India's current tariff environment, always advise customers to size for consumption matching.

Q: What does CERC say about net metering in India? A: CERC's Grid Connected Rooftop Solar PV Systems Regulations mandate net metering for LT consumers for systems up to the consumer's sanctioned load. DISCOMs are legally required to provide net metering to eligible applicants. See cerc.gov.in for the full regulatory text.

Q: Can I switch from gross metering to net metering? A: Yes, if your DISCOM's SERC regulations permit net metering for your consumer category (most residential consumers qualify). The switch requires a new net metering application, DISCOM inspection, and replacement of the gross meter with a bi-directional net meter. Process is similar to a fresh net metering application.

Q: Does PM Surya Ghar require net metering or gross metering? A: PM Surya Ghar requires an on-grid net metering connection. Gross metering installations are not eligible for the PM Surya Ghar subsidy. See our guide on the PM Surya Ghar application process for details.