How does net metering work for rooftop solar in India

What is net metering?

Net metering is a billing policy that lets your on grid solar system interact with the electricity grid. A special bidirectional meter records two things: units you consume from the grid and units your panels export to it.

At the end of each billing cycle, your DISCOM calculates the difference. If you consumed 300 units from the grid but exported 200 units, you pay for only 100 units. This "netting" is where the term comes from.

Without net metering, surplus solar power would go to waste. With it, the grid effectively acts as a free battery, absorbing your excess generation during the day and supplying power when your panels are not producing.

How it works in practice

Consider a typical Indian home with a 3 kW or 5 kW on grid solar system. On a sunny afternoon, the panels produce more electricity than the fridge, fans, and lights need. That surplus flows out through the bidirectional meter into the grid.

In the evening, when ACs and kitchen appliances switch on, solar generation drops. Your home draws power from the grid as usual. The meter tracks both directions continuously.

When your monthly bill arrives, the DISCOM subtracts exported units from consumed units. If your panels exported 250 units and you consumed 350 units from the grid, you are billed for 100 units. Some states carry forward excess credits to the next billing cycle if exports exceed imports.

This is why system sizing matters. A well sized system, matched to your daytime consumption and roof space, maximizes the share of your bill that net metering can offset. We help homeowners size their systems based on actual electricity bills and appliance loads.

Getting net metering approved

Net metering requires DISCOM approval. The process typically follows these steps. First, your solar installer submits an application to the local DISCOM on your behalf. Second, the DISCOM inspects the installed system to verify safety and grid compatibility. Third, a bidirectional meter replaces your existing unidirectional meter. Finally, the DISCOM activates the net metering arrangement.

Timelines vary by state. In cities like Bengaluru, Hyderabad, Pune, and Nagpur, the process generally takes a few weeks after installation. We handle the paperwork and DISCOM coordination as part of our installation service, so homeowners do not need to navigate the process alone.

Choosing an MNRE approved solar company simplifies this step. DISCOM offices are more responsive to applications from recognized vendors, and subsidy eligibility under PM Surya Ghar Yojana also requires an MNRE listed installer.

Net metering connects directly to your solar payback period. The more units you offset through the meter, the faster your system pays for itself. For a family paying around ₹5,000 per month in electricity, a properly sized on grid system with net metering can reduce that bill significantly, often bringing the payback period to a few years.

Understanding net metering removes much of the confusion around how rooftop solar actually saves money. It is not about storing power in batteries or going off grid. It is about using the grid smartly, producing during the day, consuming at night, and paying only for the gap. If you are evaluating residential rooftop solar for your home, net metering is the single most important billing concept to understand before you sign a quote.