Solar Panel Savings Calculator

Enter your monthly electricity bill, system size, and cost to calculate monthly savings, payback period, 25-year total savings, and return on investment after federal tax credits.

Monthly Electric Bill ($)

Electricity Rate ($/kWh)

System Size (kW)

System Cost ($)

Federal Tax Credit (%)

Annual Rate Increase (%)

Monthly Savings

$140/mo

Annual Savings

$1680/yr

Net Cost After Credits

$16,800

Payback Period

10.0 years

25-Year Total Savings

$61,252

25-Year ROI

265%

Based on 8 kW system × 1,400 avg annual kWh/kW. Federal tax credit reduces net cost to $16,800. Savings grow at 3%/yr with electricity rate increases.