Why the 25 kW Cap Is the Number Every Commercial Installer Must Know
You are sitting across from the owner of a cold-storage facility in Pune. He consumes 18,000 units a month. His sanctioned load is 75 kW. His roof has space for at least 80 kW of panels. He wants payback in five years. And every one of his competitors has already installed solar.
Your proposal says 75 kW. Your system design is solid. Your price is competitive.
Then the DISCOM net-metering application comes back declined, or worse, approved but under gross metering rules that cut his projected savings sharply, a failure mode that almost always traces back to a misstep somewhere in the DISCOM's solar approval process.
The reason: the 25 kW net metering cap that many state rules used to carry, and the patchy, state-variable set of rules above it.
Understanding the cap, where it comes from, how states have interpreted it, and how to engineer around it, is not optional knowledge for an EPC owner scaling into the commercial segment. It is the difference between a proposal that closes and one that creates a dispute six months after commissioning.
Key Takeaway
There is no single national 25 kW cap. Net metering limits are set state by state by each State Electricity Regulatory Commission (SERC), under the central Electricity (Rights of Consumers) Rules, 2020 as amended. Where a state commission has not provided for net metering, the Rules (rule 11(4), substituted on 28 June 2021) allow net metering up to 500 kW or the sanctioned load, whichever is lower. Many early state orders used 25 kW, and that figure still gets quoted. Your job is to read the current regulation of the state and DISCOM you are operating in before you size any commercial system.
Where the 25 kW Cap Comes From
State Regulations, Not CERC
Net metering for rooftop solar is not set by CERC (the Central Electricity Regulatory Commission, which regulates inter-State and central-sector matters). It is set by each State Electricity Regulatory Commission (SERC) in its own rooftop or net metering regulations. Many early state orders used a small limit, and 25 kW is the figure installers still quote, but each state has revised its rules since, some very recently (for example Telangana's TGERC Regulation 1 of 2025, and Gujarat's GERC distributed renewable energy regulations of 2026). Where a consumer's system is above the state limit, the SERC regulation decides whether gross metering, net billing or net feed-in applies, and at what tariff, as per the Feed-in Tariff (FiT) or other rate it fixes.
The Electricity (Rights of Consumers) Rules, 2020 and Its Amendments
The central layer is the Electricity (Rights of Consumers) Rules, 2020 (Gazette G.S.R. 818(E), 31 Dec 2020), as amended. What they say that matters to a commercial installer (texts checked 31 Oct 2026):
- Rule 11(4), as first notified (2020): regulations were to provide for net metering for loads up to 10 kW and gross metering above 10 kW.
- Rule 11(4), as substituted on 28 June 2021 (G.S.R. 448(E)): net metering, gross metering, net billing or net feed-in arrangements follow the State Commission's regulations. If a state's regulations do not provide for them, the Commission may allow net metering for loads up to 500 kW or up to the sanctioned load, whichever is lower, and net billing or net feed-in for other loads.
- Amendment of 22 Feb 2024 (G.S.R. 125(E)): technical feasibility is presumed if the licensee does not respond within 15 days (rule 11(7)); applications up to 10 kW are deemed accepted without a feasibility study (rule 11(7A)); connection agreement, meter and commissioning are due within 15 days of the installation certificate (rule 11(9)).
- Rule 11(12), 2020 Rules: a licensee that delays without just cause is liable to pay compensation of not less than Rs 500 per day of default.
So the numerical cap, the banking period and the export rate are all in your state's own regulation and tariff orders.
Definition: Net Metering vs Net Billing
Net metering credits exports at the same retail tariff rate as imports, meaning each exported unit offsets one imported unit at full retail value. Net billing (sometimes called "net energy metering with avoided cost pricing") credits exports at a lower rate, typically the DISCOM's avoided cost or a regulated FiT rate that is lower than the retail tariff. For a consumer above a state's net metering limit, the SERC regulation decides whether gross metering, net billing or net feed-in applies, and this gross metering vs net metering technical breakdown is a useful reference if your team needs the underlying metering mechanics spelled out. The financial difference can be large. Illustrative arithmetic (assumed rates): a net billing credit of ₹2.50/kWh vs a retail tariff of ₹8.00/kWh means each exported unit is worth only about 31 paise on the rupee.
State-by-State Net Metering Cap Comparison
This is the table your sales team needs pinned to the wall. We have not re-verified every state's numerical cap against the current SERC order, and several states issued new rooftop regulations in 2025 and 2026, so the table below tells you which regulation to read, not what the cap is. It pairs well with this state-by-state DISCOM net metering process breakdown if you need the procedural detail. Always confirm the cap, banking period and above-cap policy in the current SERC regulation and with the relevant DISCOM before submitting an application.
| State | Primary DISCOM(s) | Regulation to Check | Above-Cap Policy | Banking Period |
|---|---|---|---|---|
| Gujarat | DGVCL, MGVCL, PGVCL, UGVCL | GERC distributed RE regulations (2026) | Check SERC regulation | Check SERC order |
| Rajasthan | JVVNL, AVVNL, JdVVNL | RERC rooftop regulations (current) | Check SERC regulation | Check SERC order |
| Maharashtra | MSEDCL, BEST | MERC rooftop RE regulations (2019, amended 2024); MERC Order 75 of 2025 (25 Mar 2026) | Check SERC regulation | Check SERC order |
| Karnataka | BESCOM, MESCOM, HESCOM, GESCOM, CESC | KERC rooftop regulations (current) | Check SERC regulation | Check SERC order |
| Uttar Pradesh | PVVNL, DVVNL, MVVNL, PuVVNL, KESCO | UPERC rooftop regulations (2019, amended to June 2025) | Check SERC regulation | Check SERC order |
| Delhi | BSES Rajdhani, BSES Yamuna, TPDDL | DERC net metering regulations and guidelines (current) | Check SERC regulation | Check SERC order |
| Madhya Pradesh | MPEZ, MPPKVVCL, MPMKVVCL | MPERC rooftop regulations (current) | Check SERC regulation | Check SERC order |
| Tamil Nadu | TNPDCL (formerly TANGEDCO) | TNERC rooftop regulations (current) | Check SERC regulation | Check SERC order |
| Haryana | DHBVN, UHBVN | HERC net metering regulations (current) | Check SERC regulation | Check SERC order |
| Punjab | PSPCL | PSERC net metering regulations (current) | Check SERC regulation | Check SERC order |
| Andhra Pradesh | APEPDCL, APSPDCL | APERC rooftop regulations (current) | Check SERC regulation | Check SERC order |
| Telangana | TGSPDCL, TGNPDCL | TGERC Regulation 1 of 2025 | Check SERC regulation | Check SERC order |
Important
Caps are for solar system capacity, and the central Rules' default also refers to the sanctioned load (net metering up to 500 kW or the sanctioned load, whichever is lower). In many states the usable limit is the lesser of the state cap and the sanctioned load; confirm in your state's regulation. Also verify the DISCOM-level feeder capacity constraint before proposing any system above 50 kW.
The Numbers That Frame the Commercial Opportunity
500 kW
Default net metering ceiling in the central Rules where a state commission has not provided for it (rule 11(4), 2021)
10 kW
Applications deemed accepted without a feasibility study (Rules, 22 Feb 2024)
25–100 kW
The commercial range this guide focuses on (our framing, not a statistic)
15 days
Feasibility deadline in rule 11(7), after which the proposal is presumed feasible
Rs 500/day
Minimum compensation for licensee delay without just cause (rule 11(12), 2020 Rules)
5,000 MW
Rooftop capacity threshold in Maharashtra after which the MERC grid support charge provisions apply (MERC rooftop regulations)
Net Metering vs Net Billing vs Gross Metering, Commercial Reality Check
When your customer's system is above the state's net metering cap, you will typically face one of three scenarios, and the practical difference between net metering vs gross metering is the single biggest driver of whether the deal still makes financial sense. Understanding what each means for their financial model is essential for setting expectations and for right-sizing the system.
| Policy | How Export Is Valued | Self-Consumption Value | Financial Impact vs Net Metering | States / Scenarios |
|---|---|---|---|---|
| Net Metering (true) | Full retail tariff credit | Avoided tariff (highest) | Baseline | Depends on SERC regulation (below the state limit) |
| Net Billing | SERC-set FiT or other fixed rate | Avoided tariff (high) | Lower on surplus-heavy systems (depends on FiT vs tariff) | Where the SERC regulation provides for it above the limit |
| Gross Metering | FiT on ALL generation | None, pay full tariff for all consumption | Much lower for high-consumption commercial, no avoided tariff | Where the SERC regulation provides for it above the limit |
Illustrative Example: 50 kW System Under Each Policy (assumed numbers, not actual tariffs)
Assumptions: 50 kW system, 5 peak sun hours, 75,000 kWh/year generated, 55,000 kWh self-consumed (73%), 20,000 kWh exported. Assumed commercial tariff: ₹9.50/kWh. Assumed FiT: ₹3.00/kWh. Annual consumption is at least as high as generation. Replace these with your state's current tariff order.
- Net Metering: all 75,000 units offset imports at ₹9.50 = ₹7,12,500/year
- Net Billing (FiT ₹3.00): 55,000 × ₹9.50 = ₹5,22,500 avoided + 20,000 × ₹3.00 = ₹60,000 FiT = ₹5,82,500/year
- Gross Metering: 75,000 × ₹3.00 = ₹2,25,000/year income, and all consumption is still billed at the full tariff
Banking Rules Above 25 kW, What Happens to Surplus Units
Banking is the mechanism that allows surplus solar units to be carried forward to offset future consumption, rather than being purchased by the DISCOM immediately. For commercial consumers, banking policy has a direct impact on system economics, especially during lower-consumption months (summer, when some factories slow down) when generation peaks.
How Banking Works
When a consumer exports more units than they import in a billing cycle, the net surplus is "banked", recorded as a credit balance with the DISCOM. In subsequent months, when the consumer imports more than they export, the banked units are drawn down. The banking period, the settlement date (financial year end or another date) and the rate at which leftover surplus is settled are all set by the state's regulation or tariff order, so they differ from state to state.
Banking rules differ by state, and we have not re-verified each state's current banking period or settlement rate, so read your state's SERC regulation and the latest tariff order before you quote. Four things to find for every proposal: (1) the banking period (monthly, quarterly, annual or financial year); (2) the date on which leftover units are settled; (3) the rate at which they are settled (retail tariff, FiT or average power purchase cost); (4) whether banking is allowed at all in gross metering or net billing mode.
Installer Implication
In a state with a short banking period, a commercial customer who generates a large surplus in summer can lose it if consumption is not enough to draw it down in time. This directly affects your ROI projection. Always calculate banking utilisation by month, not just annual totals, when proposing any commercial system where self-consumption is low.
How to Advise Commercial Customers on the 25 kW to 100 kW Range
The 25–100 kW rooftop segment is where the cap discussion is most commercially sensitive. Here is the step-by-step process for giving your customer the right recommendation:
Confirm the state cap and DISCOM policy
Check the latest SERC order for your state. Do not rely on the table above for final decisions, verify with the DISCOM's solar/renewable energy helpdesk or the official state SERC website, or cross-check against our own DISCOM-wise net metering list. The cap for LT and HT connections often differs.
Calculate the customer's load profile by hour and month, the starting point of any sound commercial solar system sizing methodology
Ask for 12 months of electricity bills. Identify peak consumption months and daily consumption patterns. A factory that runs 3 shifts has a very different self-consumption profile from an office that operates 9 AM–6 PM. Higher self-consumption always means better ROI under net metering.
Determine the metering policy that will apply to your proposed system size
If the customer's ideal system size falls above the state net metering cap, calculate the financial impact under net billing or gross metering. If the degradation is significant (more than 20% on savings projections), discuss whether a smaller system under the cap produces better NPV.
Model self-consumption maximisation strategies
For consumers above the cap, advise on load shifting (running high-draw equipment during solar generation hours), battery storage to capture peak production, and EV charging infrastructure that uses daytime solar. Each percentage point of self-consumption improvement directly reduces the penalty from lower export rates.
Present two or three system-size scenarios in your proposal
Show the customer: (a) system sized just below the net metering cap, (b) full roof coverage under net billing/gross metering, (c) a hybrid with battery storage. Use actual state FiT rates for scenario (b) and (c) projections, not net metering rates. See our guide on solar payback period by state for benchmark numbers to validate your projections.
Advise on accelerated depreciation if the customer is a business entity
Under section 33 of the Income-tax Act, 2025 (in force from 1 April 2026, formerly section 32 of the 1961 Act), solar systems qualify for depreciation at 40% on the written-down value (Income-tax Rules, 2026, Appendix I). Confirm the current rate and your customer's position with their CA. This benefit applies regardless of the metering policy above the cap and can significantly improve project IRR for commercial consumers. See our detailed walkthrough on accelerated depreciation for solar.
Pros and Cons, Sizing Below vs Above the Net Metering Cap
Sizing BELOW the Net Metering Cap
- Full retail tariff credit for all surplus exports
- Simpler DISCOM application process
- Banking at retail value where the state regulation provides for it
- Faster approval and commissioning timeline
- Predictable, conservative financial projections
Cons of Sizing Below the Cap
- Leaves usable roof area and energy potential unrealised
- May not meet the customer's energy offset goals
- Misses the scale economics of larger inverters and module strings
- If consumption grows, under-sized system cannot be expanded without re-approval
- Higher per-kW cost at smaller system sizes
Sizing ABOVE the Cap (Net Billing / Gross Metering)
- Maximises roof utilisation and total generation
- Depreciation benefit scales with system cost
- Better ROI when self-consumption is high
- Positions the business for future load growth
- Scale economics reduce per-kW installed cost
Risks Above the Cap
- Export valued at the FiT or other fixed rate, usually well below the retail tariff
- Gross metering states: no self-consumption benefit
- More complex DISCOM application (HT connection upgrades, additional approvals)
- Longer approval timeline (see net metering application timeline)
- Risk of application rejection on technical grounds (see common rejection reasons)
The Feed-in Tariff Alternative, When Gross Metering Actually Makes Sense
There are limited but real scenarios where gross metering (or a high-FiT scheme) is the right recommendation:
When to Consider Gross Metering / Net Billing Above the Cap
- Seasonal businesses (e.g., sugar mills, ice cream factories): When the business shuts down entirely for 3–4 months, self-consumption drops to zero. Under net metering with banking, surplus is carried forward, but if the DISCOM's banking period expires before the business restarts, the customer loses the credits. Gross metering turns all generation into guaranteed FiT income regardless of whether the factory is running.
- Buildings with high export fractions: Data centres, hospitals, and 24x7 operations with dense consumption tend to self-consume most of their generation, making the metering model less relevant for them. But empty commercial buildings or weekend-only establishments export heavily and may benefit from analysing all options.
- States with unusually high FiT rates: If a state-specific scheme (check current SERC tariff orders) sets a high FiT, at those levels gross metering can match or approach net metering economics for high-export installations.
- Consumers planning for green tariff certification: Some large commercial buyers procure verified green power for ESG reporting. Gross metering with proper IREC certificates (India RECs) can enable a certificate-based income stream alongside FiT revenue.
How the Net Metering Cap Affects Your Sizing Recommendations in Practice
Let us walk through three hypothetical commercial customer profiles (all numbers, including the state limits, are assumptions to show the method; use your state's current regulation) and how the cap changes the recommendation:
Customer A: Garment Factory (hypothetical), 60 kW Load
Monthly consumption: 18,000 units. Shift: 3 shifts. Self-consumption potential: ~82%. Assumed state limit: 500 kW. Recommended system: 60 kW (full load match). Metering policy that applies: net metering. No cap issue at all. Focus on net metering charges and connection timeline.
Customer B: Auto Dealership (hypothetical), 40 kW Load
Monthly consumption: 9,000 units. Hours: 9 AM–8 PM. Self-consumption potential: ~65%. Assumed state LT limit: 25 kW. Recommended options: (a) 25 kW under net metering, clean, fast, fully retail credits; (b) 40 kW under net billing at an assumed FiT of ₹2.60/kWh for surplus, with a more complex settlement. For this customer, option (a) almost always wins on NPV unless the dealer has strong load-shifting flexibility.
Customer C: Warehouse Operator (hypothetical), 85 kW Load
Monthly consumption: 22,000 units. Hours: 6 AM–10 PM (mostly daytime). Self-consumption potential: ~78%. Assumed state limit: 1 MW. Recommended system: 80 kW. Net metering applies fully. This is the straightforward case: a high state limit means even large commercial rooftops sail under it. The conversation is entirely about maximising energy savings and application process.
Quickest Solar CRM, Tracking the Cap Variable Across Your Pipeline
If you are running 30–40 active commercial proposals simultaneously, keeping track of which state, which DISCOM, and which metering policy applies to each project is not a memory exercise, it is a data problem.
- Quickest Solar CRM's customisable lead stages and labels let you tag each opportunity with state, DISCOM, system size and metering policy, so your team never mis-quotes a commercial project
- Proposal templates let you set your own items and terms, so you can add the state's FiT and banking rule that you have confirmed from the SERC order
- Follow-up reminders on each lead help you check on a net metering application that has been pending longer than the timeline in your state's rules (see our post on net metering application timelines)
- Labels also let you tag commercial leads separately from residential, so your pipeline metrics are not distorted by mixing 3 kW and 75 kW projects (see solar sales funnel)
Common Questions from Commercial Customers, Your Script
Before we get to the formal FAQ, here are the objections and questions your commercial prospects will ask most often when you explain the cap:
"Can't I just install in two phases to stay under the cap?"
Technically, yes, but both applications will reference the same meter and connection point. The DISCOM will add the two system capacities and treat them as one installation. Phase 2 will be evaluated against the remaining capacity headroom, not as a standalone application. Do not recommend phased installations as a cap workaround without first verifying the DISCOM's policy.
"If I'm under gross metering, can I switch back to net metering later?"
Only if the state SERC revises its orders or your system is downsized. Once approved under gross metering, reverting requires a fresh application and often a new meter installation, adding cost and time. Get the metering policy right at the design stage.
"What if my state raises the net metering cap next year?"
State caps do change, as new SERC regulations replace old ones. You can ask a reclassification from gross to net metering from the DISCOM when a new SERC order is issued, but the process varies by DISCOM and is not automatic. Build this into your post-installation service offering and use it as a reason to stay connected with your commercial customers.
For a deeper look at why applications sometimes fail, see our post on net metering rejection reasons, and if your customer is evaluating PM Surya Ghar alongside other options, read our comparison on PM Surya Ghar vs CFA scheme.
When you are building the sales pipeline for commercial customers, the questions you qualify for at the top of the funnel determine whether you waste time sizing a 75 kW system that will end up under gross metering with economics that kill the deal. See our guide on qualifying solar leads for the pre-qualification framework our top EPC partners use.
FAQ, India's 25 kW Net Metering Cap
Is the 25 kW net metering cap a national rule or a state rule?
What happens to my customer's net metering if the system size exceeds the cap?
Can a commercial customer get net metering for a 50 kW system?
What is the FiT rate for surplus solar exports in India in 2026?
How does the 25 kW cap interact with PM Surya Ghar subsidies?
What is the banking period for commercial net metering in India?
Can I advise a customer to split a large installation across multiple meters to stay under the cap?
Will the 25 kW cap be removed nationally in the near future?
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