Solar Saving Calculator

Discover potential savings by switching to clean, cost-effective solar energy.

Select where you want to install solar

How it is calculated

The formulas behind the numbers

ResultFormula
Units used per monthMonthly bill ÷ average tariff (Residential ₹7.5, Commercial ₹9.5, Industrial ₹8.5 per unit)
Solar plant capacityUnits ÷ (daily generation per kW for your state × 30), limited by roof area ÷ 80 sq ft per kW
Monthly solar generationCapacity × daily generation per kW (3.8–5.0 units, by state) × 30
25 years savingsUnits saved × tariff × 12, summed over 25 years with 0.5% yearly panel degradation
Solar panels requiredCapacity in watts ÷ 550 W, rounded up
CO₂ emission reduced / yearYearly generation × 0.716 kg per unit (CEA grid factor) ÷ 1000
Common myths

What people believe, and what's true

Myth

Solar won't work when it's cloudy or cold.

Fact

Panels run on light, not heat. Under a light overcast sky they still produce around half their full-sun output.

Myth

Panels will improve, so I should wait.

Fact

Every month you wait is another full bill paid. A 3–5 year payback earns more by starting today.

Myth

It's too costly to be viable.

Fact

Payback takes 3–5 years against a 25–30 year life. Homes can also claim a government subsidy.

Myth

It needs a lot of maintenance.

Fact

No moving parts and no fuel. A monthly clean is the main job.

Myth

Solar energy is inefficient.

Fact

Modern modules make about 4 units per kW on an average sunny day, from fuel that costs nothing.

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