Enter system size, sun hours, electricity rate, and installed cost to estimate annual kWh production, dollar savings, payback years, and 20-year savings. Educational—not a solar quote.

How to use this tool

1. Enter system size in kW from your proposal. 2. Enter average sun hours per day for your area. 3. Enter your electricity rate and installed system cost. 4. Optionally set federal ITC %, utility rate escalation %, and performance ratio. 5. Click Calculate savings. 6. Compare payback with installer figures and incentives.

Worked example

Example: a 6 kW system with 5 sun hours/day produces about 10,950 kWh/year at 100% performance ratio—at $0.14/kWh that is roughly $1,533 saved in year one. A 30% ITC lowers net cost; 3% rate escalation grows later-year savings.

How it works

Estimates annual kWh production from system size and sun hours, scales by an optional performance ratio, converts to dollar savings at your utility rate (with optional annual rate escalation), and computes simple payback and 20-year savings after an optional federal ITC credit and panel degradation. Educational only—not a solar quote.

Limitations

Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.

Privacy and file handling

Your data stays on your device and is not uploaded.

FAQ

Frequently asked questions

Is Solar Savings Calculator free?

Yes. It is free to use and you do not need to sign in or create an account.

Is my data private?

See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.

Can I use Solar Savings Calculator on mobile?

Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.

Page last reviewed: July 24, 2026

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