- The net metering 500 kW limit is a common state cap, not a national law.
- Above the cap, many states use net billing or gross metering instead (verify).
- The net-to-gross shift mostly hits larger C&I systems, not small rooftops.
- This is the most volatile topic in the hub — every number can move.
- Re-verify caps, models and fees against MoP / MNRE / SERC orders regularly.
The net metering 500 kW limit is one of the most searched and most misread rules in Indian rooftop solar. There is no single national cap. Each state sets its own ceiling and its own metering model, and those numbers change with each amendment. This page keeps the facts straight so you can quote large jobs without getting burned.
What the 500 kW limit really means
The 500 kW limit is a common upper cap that several states use for net metering eligibility. In plain words: up to a state ceiling, your client can use net metering, where export is netted against import in kilowatt-hours. Above that ceiling, the rules often change.
The exact cap is set by each State Electricity Regulatory Commission (SERC) and run by each DISCOM. Some states cap net metering lower, some higher, and some tie it to the customer's sanctioned load. So treat 500 kW as a frequent reference point, not a guarantee. Verify the current figure with your DISCOM or the SERC regulation before you size a large system.
Rule versus news
A lot of reporting blurs the line between a passed order and a proposal under discussion. A rule is a notified regulation you can cite. News is a draft, a consultation paper, or a press report about a future change. We label both clearly below, because quoting a proposal as law is how an EPC loses a client's trust.
Why the cap matters for your margins
The cap matters because it decides how your client gets paid for export. Under net metering, every exported unit can offset an imported unit at the retail tariff, which is the best value for the customer. Cross the cap into net billing or gross metering, and export is paid a separate, usually lower, rate.
That change can move a commercial project's payback by years. If you size a 600 kW system on the assumption of net metering and the state actually applies net billing above 500 kW, your savings estimate is wrong and your proposal falls apart. The cap is a number you must check first, not last.
Sanctioned load still rules
Even under the cap, system size is tied to the customer's sanctioned load. A client with a 200 kW sanctioned load cannot net-meter a 500 kW system without a load enhancement. Read our guide on load enhancement before you promise a size.
The net-to-gross shift, explained
The net-to-gross shift is the trend of some states moving larger systems away from net metering toward net billing or gross metering. It is driven by DISCOM concerns about revenue and grid balance, not by a single central order. The direction varies by state and by year.
Here is the difference in plain terms. Net metering nets your export against your import, so you pay for net units. Net billing pays your export a separate, usually lower, rate while you buy import at retail. Gross metering sells all your generation at a fixed feed-in tariff and buys all your consumption at retail. Our full model comparison walks through each.
Rule tracker — verify each line
Use this tracker as a starting map, not a final answer. Every row below moves with state orders. Confirm each figure against the current SERC regulation for your DISCOM before you quote.
Caption: Common positions across states. Source: MoP / MNRE / SERC orders — re-verify every 30 days.
Which states are moving, and how to read it
Which states are shifting changes too often to pin down in a static list, so we will not name a fixed set here. What stays true is the pattern: large commercial and industrial systems are the first to feel a move toward net billing or gross metering, while small rooftops usually keep net metering.
To read your own state, check three things: the current SERC net metering regulation, the latest tariff order, and any draft amendment open for comment. If a draft proposes gross metering above a threshold, treat it as a warning, not a fact, until it is notified. Our capacity limits by state table tracks the headline caps.
What the shift changes for EPCs
The shift changes how you quote, size and pitch large systems. If you sell on net metering savings that no longer apply, your proposals overpromise and your reputation suffers. If you read the rule first, you can pitch the right model and even use storage to capture value the grid no longer pays for.
- Size to the model. Under net billing or gross metering, a smaller, self-consumption-led system can beat an oversized export system.
- Pitch storage. When export pays less, a battery that shifts solar to evening load can lift returns. See net metering vs battery storage.
- Write honest payback. State the metering model in the proposal and label it as subject to change.
- Track per state. If you work across DISCOMs, keep a per-state rule sheet — our multi-state playbook shows the framework.
How to keep this rule current
You keep the rule current by checking primary sources on a regular cadence, not by trusting an old proposal. The fastest reliable path is the SERC website for orders, the DISCOM notice board for the operating procedure, and the Ministry of Power for central rules.
A simple monthly check
Once a month, confirm three things for each state you work in: the current net metering cap, the metering model above the cap, and any open draft amendment. Note the date you checked. When a figure changes, update your quotation template the same day so no proposal goes out with a stale number.
How SuryaHub helps you track the rule
SuryaHub keeps each state's cap, metering model and DISCOM step inside one tracked workflow. When a rule moves, you update it in your government-workflow setup, and every new quotation picks up the current model — so a change updates your process instead of catching a job mid-flight. SuryaHub is pre-revenue; real pilots are Suryantra Energy and RGESPL, and figures here are scheme references, not guarantees.
Quote large jobs on the right model
See how SuryaHub tracks each state's cap and metering model.
Related guides
Frequently asked questions
Is there a 500 kW limit on net metering in India?+
Net metering eligibility commonly runs up to a state cap, and many states set that ceiling around 500 kW. The exact cap is set by each State Electricity Regulatory Commission and changes with each amendment. Verify the current figure with your DISCOM or the SERC regulation before you size a large system.
What is the net-to-gross metering shift?+
The net-to-gross shift is the trend of some states moving larger rooftop systems away from net metering toward net billing or gross metering. Net metering nets export against import, while gross metering pays a fixed feed-in tariff for all generation. Verify the current model with your SERC.
Does the net-to-gross change affect small rooftop systems?+
Most net-to-gross changes target larger commercial and industrial systems, not small residential rooftops. Small systems usually keep net metering, and systems up to 10 kW often have deemed feasibility under the central rule. Verify the current central rule and your state notification, because thresholds were debated in 2024 to 2026.
How should an EPC track net metering rule changes?+
An EPC should check the latest orders from the Ministry of Power, MNRE and the relevant SERC, and re-verify caps, models and fees on a regular cadence. Rules change with each amendment, so a single snapshot goes stale fast. SuryaHub keeps each state rule and job in one tracked workflow.
Is the 500 kW cap a national rule?+
No. There is no single national net metering cap. Each State Electricity Regulatory Commission sets its own ceiling and metering model, and each DISCOM applies them. The 500 kW figure is a common reference, not a guaranteed limit. Verify the current cap with your DISCOM or SERC.
How does SuryaHub help with net metering rule changes?+
SuryaHub keeps each state cap, metering model and DISCOM step in one tracked workflow, so a rule change updates your process instead of catching a job mid-flight. SuryaHub is pre-revenue; real pilots are Suryantra Energy and RGESPL, and every figure here is a scheme reference, not a guarantee.
Sources & references
Caps and metering models come from primary government and regulator sources. This is the most volatile topic in the hub, so always confirm the current figure with your SERC and DISCOM before you quote.
- Ministry of Power (MoP) ↗
Rules and amendments on metering arrangements for rooftop solar.
- Ministry of New & Renewable Energy (MNRE) ↗
Scheme guidelines and rooftop solar targets.
- Central Electricity Authority (CEA) ↗
Technical metering and connectivity standards.
Written by the SuryaHub team · reviewed against MoP / MNRE / SERC sources · updated 19 June 2026.
Method: High-refresh page. Caps, models and the net-to-gross status are taken from primary sources and re-verified every 30 days against MoP/MNRE/SERC. The ≤10 kW deemed-feasibility threshold and any 2024–2026 amendment must be checked as the current central rule. SuryaHub is pre-revenue; only Suryantra Energy and RGESPL are real pilots.
Change log: 19 Jun 2026 — first published.