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 by 40 percent.
The reason: India's 25 kW net metering cap, 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
India's central net metering framework originally capped net metering eligibility at 25 kW of solar capacity, beyond which systems move to gross metering or state-specific net billing with different financial rules. However, CERC's 2023 amendments and state-level orders have raised this cap significantly, to 500 kW or 1 MW in several states, meaning the "25 kW cap" is no longer a hard national ceiling. Your job is to know the exact cap for the state and DISCOM you are operating in before you size any commercial system.
Where the 25 kW Cap Comes From
The CERC 2010 Roots
India's net metering framework traces back to CERC's renewable energy purchase regulations of 2010, which established the conceptual framework for surplus solar energy fed back to the grid. The 25 kW ceiling emerged from early state-level net metering regulations introduced between 2013 and 2016, when most state electricity regulatory commissions (SERCs) drafted their own net metering orders.
At the time, 25 kW was the practical upper boundary of residential and small commercial rooftop systems. The regulators drew the line there to manage DISCOM billing complexity, transformer loading, and reverse power flow management, all legitimate concerns at the time. Above 25 kW, consumers were pushed toward gross metering, where all solar generation is exported to the grid at a declared Feed-in Tariff (FiT) and all consumption is separately imported at the consumer tariff.
The MNRE 2016 Framework
The MNRE's model net metering regulations of 2016 attempted to harmonise state-level rules. They allowed net metering up to the consumer's sanctioned load (or 1 MW, whichever was lower), but left states the discretion to set their own caps. This created the patchwork we have today, states implementing anywhere from 10 kW to 1 MW as their net metering ceiling.
The CERC 2023 Amendments
The most significant recent development is the CERC Net Metering (Second Amendment) Regulations, 2023, which clarified and strengthened net metering rights for prosumers. Key provisions relevant to commercial installers:
- Net metering must be permitted for all eligible consumers up to the limits set by the relevant SERC
- DISCOMs cannot unreasonably delay approvals beyond the timelines specified in state orders
- Banking of surplus units (carrying forward excess credits to future billing cycles) is permitted as per state regulations
- The transition from net metering to net billing (for systems above the cap) must follow a defined regulatory process, DISCOMs cannot unilaterally downgrade an approved connection
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 commercial consumers above the 25 kW cap, most states offer net billing rather than true net metering. The financial difference is significant: a net billing credit of ₹2.50/kWh vs a retail tariff of ₹8.00/kWh means each exported unit is worth only 31 paise on the rupee.
State-by-State Net Metering Cap Comparison
This is the table your sales team needs pinned to the wall. Caps are as of mid-2026 based on the latest available SERC orders. Always verify with the relevant DISCOM before submitting an application, as caps can change with new tariff orders.
| State | Primary DISCOM(s) | Net Metering Cap | Above-Cap Policy | Banking Period |
|---|---|---|---|---|
| Gujarat | DGVCL, MGVCL, PGVCL, UGVCL | 500 kW | Gross metering above 500 kW | 12 months |
| Rajasthan | JVVNL, AVVNL, JdVVNL | 1 MW | Net billing above 1 MW | 12 months |
| Maharashtra | MSEDCL, BEST | 1 MW | Gross metering or net billing at DISCOM discretion | 12 months |
| Karnataka | BESCOM, MESCOM, HESCOM, GESCOM, CESC | 500 kW | Gross metering above 500 kW | Financial year end |
| Uttar Pradesh | PVVNL, DVVNL, MVVNL, PuVVNL, KESCO | 500 kW (LT); 1 MW (HT) | Net billing at UPNEDA FiT | 12 months |
| Delhi | BSES Rajdhani, BSES Yamuna, TPDDL | 1 MW | Case-by-case DERC approval | 12 months |
| Madhya Pradesh | MPEZ, MPPKVVCL, MPMKVVCL | 50 kW (LT); 100 kW (HT) | Gross metering above limit | Financial year end |
| Tamil Nadu | TANGEDCO | 500 kW (LT/HT net metering) | Gross metering default for large commercial | 12 months |
| Haryana | DHBVN, UHBVN | 25 kW (LT); 200 kW (HT) | Net billing at HERC-set FiT | Quarterly |
| Punjab | PSPCL | 100 kW | Gross metering above 100 kW | 12 months |
| Andhra Pradesh | APEPDCL, APSPDCL | 1 MW | Net metering with APERC approval | 12 months |
| Telangana | TSSPDCL, TSNPDCL | 500 kW | Net billing at TSERC FiT | 12 months |
Important
State caps are for solar system capacity, not sanctioned load. A consumer with a 100 kW sanctioned load in Gujarat can install up to 100 kW of panels (the lesser of sanctioned load and state cap) under net metering. Verify both the state cap and the DISCOM-level feeder capacity constraint before proposing any system above 50 kW.
The Stats That Frame the Commercial Opportunity
67 GW
India's cumulative solar installed capacity (March 2026)
11.8 GW
Rooftop solar segment total (residential + commercial)
25–100 kW
Sweet spot for commercial rooftop (highest growth segment)
₹2.50–₹3.50
Typical FiT rate for surplus export (most states)
40 GW
MNRE rooftop solar target by 2030
12 months
Maximum banking period in most states (surplus carry-forward)
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. 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 | Gujarat, Rajasthan, Maharashtra (under cap) |
| Net Billing | SERC-set FiT (₹2–₹3.50) | Avoided tariff (high) | 15–30% worse on surplus-heavy systems | UP (above 500 kW), Haryana (above 25 kW LT) |
| Gross Metering | FiT on ALL generation | None, pay full tariff for all consumption | 30–50% worse for high-consumption commercial | Some TN, Gujarat above 500 kW, MP above cap |
Real Numbers: 50 kW System Under Each Policy (Maharashtra, FY2026)
Assumptions: 50 kW system, 5 peak sun hours, 75,000 kWh/year generated, 55,000 kWh self-consumed (73%), 20,000 kWh exported. MSEDCL commercial tariff: ₹9.50/kWh. FiT: ₹3.00/kWh.
- Net Metering: ₹5,22,500 avoided + ₹60,000 export credit = ₹5,82,500/year
- Net Billing (FiT ₹3.00): ₹5,22,500 avoided + ₹60,000 FiT = ₹5,82,500/year (same here, FiT credit is equivalent; varies by state)
- Gross Metering: 75,000 × ₹3.00 = ₹2,25,000 income − extra consumption bill = net saving of only ~₹1,30,000/year
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. Most states allow banking for 12 months, after which any remaining surplus is either purchased by the DISCOM at the FiT rate or forfeited. The banking period resets at the financial year end in some states (Karnataka, MP) or on the connection anniversary date in others.
Key banking rules by state (commercial connections):
- Gujarat (DGVCL/MGVCL/PGVCL/UGVCL): 12-month rolling banking period. Units banked above 500 kW (gross metering zone) are settled at the prevailing FiT rate at year end, not at retail tariff. This means over-sizing is penalised.
- Maharashtra (MSEDCL): 12-month banking under net metering. Surplus at year end is purchased at the MERC-approved FiT rate. No banking in gross metering mode.
- Rajasthan: 12-month banking, settled at the RERC average power purchase cost (APPC) rate, approximately ₹3.20/kWh in FY2026. The APPC is slightly better than the standard FiT in Rajasthan.
- Karnataka (BESCOM): Banking resets at financial year end (31 March). Any surplus as at 31 March is paid at the KERC FiT rate (currently ~₹2.25/kWh for commercial). Consumers with heavy April–September generation need careful sizing to avoid material losses.
- Haryana: Quarterly banking settlement for LT consumers above 25 kW under net billing. Short settlement windows mean over-sizing is expensive.
Installer Implication
In states with quarterly banking (Haryana, some older MP tariff orders), a commercial customer who generates 30% surplus in summer will lose that surplus if they do not have enough consumption to draw it down within the quarter. 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 below 80%.
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. The cap for LT and HT connections often differs.
Calculate the customer's load profile by hour and month
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 32 of the Income Tax Act, solar systems qualify for 40% accelerated depreciation in year 1. 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
- 12-month banking at retail value in most states
- 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
- Accelerated depreciation benefit scales with system cost
- Better ROI when self-consumption is above 80%
- Positions the business for future load growth
- Scale economics reduce per-kW installed cost
Risks Above the Cap
- Export valued at FiT rate (30–70% below 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 (above 50%): Data centres, hospitals, and 24x7 operations with dense consumption tend to self-consume 85–90% of 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: A few state-specific schemes (check current SERC tariff orders) have set FiT rates above ₹4.50/kWh. 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 real-world commercial customer profiles and how the cap changes the recommendation:
Customer A: Garment Factory, Karnataka, 60 kW Load
Monthly consumption: 18,000 units. Shift: 3 shifts. Self-consumption potential: ~82%. State cap: 500 kW (BESCOM). 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, Haryana, 40 kW Load
Monthly consumption: 9,000 units. Hours: 9 AM–8 PM. Self-consumption potential: ~65%. State LT cap: 25 kW. Recommended options: (a) 25 kW under net metering, clean, fast, fully retail credits; (b) 40 kW under net billing, HERC FiT ~₹2.60/kWh for surplus, complex quarterly settlement. For this customer, option (a) almost always wins on NPV unless the dealer has strong load-shifting flexibility.
Customer C: Warehouse Operator, Maharashtra, 85 kW Load
Monthly consumption: 22,000 units. Hours: 6 AM–10 PM (mostly daytime). Self-consumption potential: ~78%. State cap: 1 MW. Recommended system: 80 kW. Net metering applies fully. This is the straightforward case, Maharashtra's high cap means even large commercial rooftops sail under it. The conversation is entirely about maximising energy savings and application process.
QuickEstimate, 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.
- QuickEstimate's lead pipeline lets you tag each opportunity with state, DISCOM, system size, and metering policy, so your team never mis-quotes a commercial project
- Custom proposal templates auto-populate the correct FiT rate and banking rules for the selected state, reducing proposal errors on above-cap commercial systems
- Follow-up sequences can be configured to remind you when a net metering application has been pending longer than the state's mandated timeline, helping you catch delays before the customer does (see our post on net metering application timelines)
- The solar sales funnel in QuickEstimate allows you to tag commercial leads separately from residential, so your pipeline metrics are not distorted by mixing 3 kW and 75 kW projects
- WhatsApp follow-up automation means your commercial prospects receive timely updates at each stage without manual intervention, critical for the longer approval cycles above 25 kW
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. Karnataka raised its cap significantly in 2019. Gujarat expanded its rules in 2021. You can request 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?
Want to put this into practice?
QuickEstimate gives you everything in this article, proposal automation, lead capture, WhatsApp follow-up, built for Indian solar EPCs.
Start free
