Net Metering for Industrial Rooftop Solar: How Indian Manufacturers Can Maximize Export and Import Savings

Quick answer: Net metering lets an industrial or commercial rooftop solar system export surplus power to the grid and offset it against power drawn later, so the facility pays only for its net consumption. Under India's net metering rules, the Ministry of Power's 2021 order limits net metering to systems up to 10 kW in several states, while states such as Gujarat, Rajasthan, and Tamil Nadu now permit net metering up to 500 kW or the sanctioned load, whichever is lower, for industrial and commercial consumers. Systems above the applicable state threshold typically shift to gross metering, where solar output is sold to the DISCOM at a separate feed-in tariff instead of directly reducing the bill, which changes the payback math considerably.

Why net metering suddenly matters to every factory owner evaluating solar

India's rooftop solar base has grown from a niche experiment into a mainstream industrial decision. Grid-connected rooftop solar capacity stood at 30.11 GW as of June 30, 2026, according to the Ministry of New and Renewable Energy (MNRE), and the country's overall installed solar capacity surged to 129 GW in 2025, up from just 3 GW in 2014. FY2026 alone (April 2025 to March 2026) added a record 44.6 GW of solar capacity nationally, an 87.2 percent jump over the previous year, with roughly 8.7 GW of that coming from rooftop installations.

Commercial and industrial (C&I) consumers have historically driven the largest share of India's rooftop solar additions, precisely because the economics of photovoltaic self-consumption are strongest for facilities with high daytime power draw. But that growth has run directly into a policy bottleneck: the same December 2020 Ministry of Power order that expanded solar adoption nationally also capped net metering eligibility for many states at 10 kW, pushing larger industrial systems toward gross metering arrangements with materially different economics.

The pain point business owners rarely see coming

Most industrial and business buyers start their solar journey assuming that whatever they generate will simply be netted off their bill. That assumption breaks down fast once system size grows beyond a few kilowatts. Under gross metering, the DISCOM buys 100 percent of the solar output at a fixed feed-in tariff, typically in the range of ₹2 to ₹4 per kWh, while the facility continues to buy grid power separately at retail industrial tariffs. When feed-in compensation sits below the effective value of self-consumed power, the return on investment stretches out and the entire capital planning exercise has to be redone.

This is why net metering eligibility, not panel wattage or brand, is often the single biggest variable in whether a rooftop solar project for a factory, warehouse, or commercial building actually pencils out.

How net metering actually works for industrial and commercial consumers

Net metering, at its core, is a billing arrangement layered on top of a grid-connected solar power installation. A bidirectional meter records both the power a facility draws from the grid and the power it exports back. At the end of the billing cycle, the utility charges (or credits) only the net difference.

In practice, three factors decide whether a business qualifies:

• State-specific capacity thresholds. States such as Gujarat, Rajasthan, and Tamil Nadu allow net metering up to 500 kW or the sanctioned connected load, whichever is lower, for industrial and commercial consumers, while other states still hold closer to the central 10 kW guideline for certain consumer categories.
• Sanctioned load versus system size. Utilities generally cap the solar system size at a percentage of the facility's sanctioned electricity load, so a business planning aggressive expansion should size its application with future load in mind, not just current consumption.
• DISCOM approval workflow. Every net metering connection needs feasibility approval, meter installation, and inspection sign-off from the local distribution company, a process that realistically takes 45 to 90 days across most states.

What changes financially when you fall outside the net metering limit

When a system exceeds the net metering threshold, it does not become uneconomical, but the calculation shifts. Instead of self-consumption reducing the bill kilowatt-hour for kilowatt-hour at the retail industrial tariff, exported units are compensated at a separately negotiated or regulator-determined feed-in rate. Because that gross metering rate typically sits below the retail tariff a facility would otherwise pay, businesses are increasingly asked to plan hybrid strategies: sizing the rooftop system close to the net metering cap for maximum self-consumption value, then evaluating open access or a separate ground-mounted array for any additional capacity needed beyond that threshold.

On the cost side, the picture has also improved recently. The GST Council rationalized GST on renewable energy devices, including solar power generating systems, from 12 percent to 5 percent effective September 22, 2025, which the government estimates lowers the cost of a typical rooftop system by a meaningful margin and improves the overall payback timeline. Commercial-scale rooftop installations in India currently run in the broad range of ₹35 to ₹55 per watt before incentives, with net metering application fees of roughly ₹500 to ₹5,000 and bidirectional meter costs of about ₹2,000 to ₹10,000, both state-dependent and both GST-inclusive when quoted correctly by an EPC partner.

Smarter buying criteria: what to check before signing a solar contract

Given how much net metering eligibility affects returns, industrial and business buyers evaluating rooftop solar should treat it as a core design input, not an afterthought. A smarter evaluation process looks for:

• Upfront net metering eligibility mapping. Confirm the exact capacity threshold that applies in your state and DISCOM jurisdiction before finalizing system size, not after installation.
• System sizing tied to sanctioned load. The proposed system should be sized against your actual sanctioned load and future expansion plans, not just current rooftop area.
• Transparent gross-versus-net economics. Ask for a side-by-side financial projection showing returns under both net and gross metering, so there are no surprises if your system crosses a threshold.
• End-to-end DISCOM liaison. Approvals, inspections, and meter installation should be handled by your EPC partner, not left to your internal team to chase.
• Clear, GST-inclusive commercial terms. Every quotation should state whether GST is included and reflect the current 5 percent rate on solar power generating systems.

Getting these details right at the design stage is what separates a rooftop solar investment that performs as promised from one that quietly underdelivers for years.

Where SKP Solar World fits into this decision

This is exactly the gap SKP Solar World is built to close for industrial and business rooftop solar buyers across India. As an EPC provider handling design, supply, and installation of rooftop solar power systems, the team works through net metering feasibility, sanctioned load review, and DISCOM approvals as part of the project scope, rather than leaving businesses to navigate state-specific rules on their own. If you want to see how your facility's sanctioned load and roof area translate into an eligible net metering capacity, check your net metering eligibility with SKP Solar World before finalizing any system size.

For businesses already comparing quotes, it is worth asking each vendor to show projected savings under both net and gross metering scenarios; SKP Solar World's team routinely walks facility owners through a state-specific net metering and payback assessment so the numbers reflect real DISCOM rules rather than generic assumptions. Because system sizing decisions made early are hard to reverse later, many businesses also use this stage to get a rooftop solar feasibility and sizing review from SKP Solar World that accounts for both current sanctioned load and planned expansion.

Manufacturers weighing solar against continued reliance on grid power and diesel backup can also request a detailed EPC proposal from SKP Solar World that lays out the net metering pathway, expected approval timeline, and GST-inclusive pricing in one document, removing much of the guesswork from an otherwise complex regulatory process.

If your facility's electricity bill has been climbing and you are unsure whether your rooftop qualifies for full net metering benefits or a hybrid approach, the simplest next step is to compare your current electricity bill with your projected solar savings at skpsolarworld.com. It takes only your recent bill and basic facility details to get a realistic, state-specific picture of what net metering could actually be worth to your business.

Frequently asked questions

What is the difference between net metering and gross metering for industrial solar in India?

Under net metering, a facility's solar export is offset directly against its grid consumption, and only the net difference is billed. Under gross metering, all solar output is sold to the DISCOM at a separate feed-in tariff, while the facility continues paying full retail rates for all power it draws from the grid. Net metering is generally more favorable for facilities with high daytime consumption, while gross metering compensation, typically ₹2 to ₹4 per kWh, tends to be lower than retail industrial tariffs.

Is my factory eligible for net metering if my system is larger than 10 kW?

It depends on your state. While the central Ministry of Power framework references a 10 kW threshold in several states, states including Gujarat, Rajasthan, and Tamil Nadu allow net metering for industrial and commercial consumers up to 500 kW or the sanctioned load, whichever is lower. Checking your specific state and DISCOM policy before finalizing system size is essential.

How long does net metering approval take for a business in India?

Across most states, the realistic timeline from application to final net metering approval, including feasibility review, meter installation, and inspection, runs 45 to 90 days. Timelines can vary by DISCOM workload and how completely the application and supporting documents are prepared.

Does GST affect the total cost of an industrial rooftop solar system?

Yes. The GST Council reduced the rate on renewable energy devices, including solar power generating systems, from 12 percent to 5 percent, effective September 22, 2025. This lowers the effective cost of a rooftop system and should be reflected clearly in any GST-inclusive quotation from your EPC partner.

What happens if my system size is close to the net metering threshold?

Systems sized right at or near the state's net metering cap generally get the best combination of self-consumption savings and manageable approval requirements. Many businesses choose to size their net-metered system close to that threshold and evaluate a separate open access or ground-mounted arrangement for any additional capacity needed beyond it, rather than pushing the entire installation into gross metering.

Sources

• Ministry of New and Renewable Energy: Physical Progress (grid-connected rooftop solar capacity)
• Press Information Bureau: India's Solar Momentum
• JMK Research: India Installs Record 44 GW Solar and 6 GW Wind Capacity in FY2026
• IEEFA: The Impact of the 10kW Net-Metering Limit on India's Rooftop Solar Market
• Akuntha: Net Metering in India 2026, Rules, Benefits and Policy
• Press Information Bureau: GST on Renewable Energy Devices Rationalised to 5 Percent