Calculating your annual savings is straightforward once you know the Solar Savings formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Solar Savings Calculator.
What is Solar Savings?
The Solar Savings calculation tells you your annual savings from a few simple inputs. The figure you are solving for here is the annual savings, expressed in INR.
The Solar Savings formula
The core formula is:
Annual savings = Current monthly electricity bill × Bill offset by solar ÷ 100 × 12Here is what each input means:
- Current monthly electricity bill — a money amount. Example: ₹5,000.
- Bill offset by solar — a percentage, such as an annual rate. Example: 8%.
How to calculate it step by step
- Write down the current monthly electricity bill (for example, ₹5,000).
- Write down the bill offset by solar (for example, 8%).
- Apply the formula above to get your annual savings.
- Double-check the result with the Solar Savings Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Current monthly electricity bill | ₹5,000 |
| Bill offset by solar | 8% |
| Annual savings | ₹48,000 |
| Monthly savings | ₹4,000 |
| 25-year savings | ₹12,00,000 |
With current monthly electricity bill of ₹5,000 and bill offset by solar of 8%, the annual savings works out to ₹48,000.
Example 2
With current monthly electricity bill of ₹10,000 and bill offset by solar of 8%, the annual savings works out to ₹96,000.
| Result | Value |
|---|---|
| Annual savings | ₹96,000 |
| Monthly savings | ₹8,000 |
| 25-year savings | ₹24,00,000 |
Example 3
With current monthly electricity bill of ₹2,500 and bill offset by solar of 8%, the annual savings works out to ₹24,000.
| Result | Value |
|---|---|
| Annual savings | ₹24,000 |
| Monthly savings | ₹2,000 |
| 25-year savings | ₹6,00,000 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Solar Savings Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring energy calculators with these tools: Generator Fuel Consumption Calculator, Solar Panel Calculator, Solar Payback Period Calculator, Generator Size Calculator, Inverter Size Calculator.