How Much Rooftop Solar Do You Need to Zero-Out Your MP Electricity Bill?

You don't need to be an engineer to size a solar system. With two numbers from your electricity bill, you can estimate exactly how much rooftop solar it takes to bring your Madhya Pradesh bill to near zero.

Step 1: Find your monthly units

Look at your MP DISCOM bill for units consumed (kWh) per month. If you only know the rupee amount, divide it by roughly ₹8 per unit (an indicative MP domestic slab). So a ₹4,000 bill ≈ 500 units.

Step 2: Convert units to system size

In Madhya Pradesh, 1 kW of solar generates about 120–130 units a month (based on ~4–4.5 peak sun-hours a day). To find your size:

System size (kW) = Monthly units ÷ 125

For 500 units: 500 ÷ 125 = 4 kW.

Step 3: Check your roof

You need about 100 sq. ft of shadow-free roof per kW. A 4 kW system needs roughly 400 sq. ft, a modest terrace. South-facing, unshaded space is ideal, but east/west works too with a small yield trade-off.

Step 4: Estimate the savings

A system sized to your consumption offsets almost your entire bill. That ₹4,000-a-month home saves close to ₹48,000 a year, and with tariffs rising ~3% annually, well over ₹15 lakh across 25 years.

A quick reference

Don't oversize

Under net metering, exporting far more than you consume doesn't pay: MP settles surplus at a modest rate, and the PM Surya Ghar subsidy caps at 3 kW. Size to your actual consumption plus a small buffer, not to your roof's maximum.

Want the exact number for your home? Our savings calculator does this math live, or book a free survey and we'll measure your roof and design the system for you.