Sun Hours: Solar Forecast

Know what your solar panels could produce today—without connecting an inverter or entering technical specs.

Sun Hours turns your location and best-ever solar day into a clear, personalized solar production forecast in seconds.

SET UP IN TWO STEPS

1. Enter your ZIP code or choose a location on the map.
2. Enter the most kWh your panels have generated on a great day.

No inverter login, azimuth, tilt, account, or engineering knowledge required.

PLAN AROUND YOUR SOLAR POWER

• Estimated solar generation in kWh for today
• Hour-by-hour production curve
• 7-day solar panel forecast
• Cloud cover and daily efficiency breakdown
• Best two-hour solar window for EV charging, laundry, the dishwasher, and other high-energy tasks
• Optional morning alerts
• 30-day outlook based on historical weather for your location

SIMPLE BY DESIGN

Sol, the friendly Sun Hours mascot, gives you a quick summary when you open the app. Use the detailed forecast when you want it; skip the complicated dashboards when you don't.

WORKS WORLDWIDE

Enter a supported location or drop a pin to create a forecast wherever your panels are installed.

PRIVACY-FRIENDLY

No account is required. Sun Hours is free with infrequent ads; a Pro upgrade removes ads and unlocks more tools.

Forecasts are estimates. Actual production can vary with shading, panel condition, inverter performance, system losses, and local weather.