Solar Savings Home Calculator
Enter your monthly electricity bill, system size, and local sun hours to estimate annual solar savings and payback period.
Your Inputs
Southwest US: 5–6 | Midwest: 4–5 | Northeast: 3–4
Most homes use 5–10 kW
US average ~$3,000/kW before tax credits
Accounts for inverter losses, shading, temperature. Typical: 75–85%
Annual Production
—
kWh / year
Annual Savings
—
dollars / year
Payback Period
—
years
20-Year Savings
—
total dollars
Fill in the fields and click Calculate Savings to see your estimate.
Summary
Enter your monthly electricity bill, system size, and local sun hours to estimate annual solar savings and payback period.
How it works
- Enter your average monthly electricity bill in dollars.
- Input your local average daily sun hours (typically 3–6 for most US regions).
- Specify the solar system size in kilowatts (kW) — common home systems are 5–10 kW.
- Enter your electricity rate per kWh if known, or use the estimated rate derived from your bill.
- Optionally enter the total installation cost to calculate payback period and 20-year ROI.
- The calculator instantly shows annual production (kWh), annual savings ($), and break-even timeline.
Use cases
- Estimate savings before getting a solar installer quote.
- Compare different system sizes to find the best fit for your budget.
- Calculate payback period when weighing a solar loan or lease.
- Understand how local sun hours affect your potential savings.
- Project 20-year financial return on a solar investment.
- Quickly sanity-check installer quotes against independent estimates.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu