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Solar Forecast
Enter a location and PV size to begin.
Tomorrow's solar signal
Enter location and PV size to see tomorrow and the next 72 hours.
Weather input
Sun, clouds and rain by hour.
Brighter sun means stronger irradiance. Darker cloud means more cover. Blue marks rain risk.
Total sun - sun hitting the roof
Direct sun - strongest clear beam
Scattered light - light through cloud
Clouds - day avg
Forecast Likely range Clear-sky reference Night Best use window
Only real production can teach the model your roof.
GridPassport turns that into more accurate forecasts and battery, inverter and load control.
Forecast quality
No forecast loaded yet.
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