Life & fun · September 3, 2026
Rooftop Solar Forecaster
Use more of your own solar generation!
What it does
Solar owners use only about 40% of the power their panels produce. The other 60% is sold to the grid and bought back later, costing a typical home $600 - $1,000 a year. OnSun is built to help you use more of the solar you generate. We forecast what your roof will make for the week ahead, help you line up the EV charger, washing, dishwasher and pool pump with the sunniest hours, and remind you when to run each.
See your solar before it happens. OnSun forecasts your panels
Solar panels installed but electricity bills still high? OnSun forecasts your solar production 7 days ahead and shows you the best times to run appliances, so you use your own free energy instead of buying it back from the grid. The average household exports 50 to 70% of its solar production back to the grid for as little as 4 to 8 cents per kilowatt-hour, then buys that same energy back at night for 25 to 40 cents. Shifting your washing machine, dishwasher, or EV charger into the solar window doesn't require new hardware. It just requires knowing when to press start. See your expected solar output for the week ahead. Know which days to run high-draw appliances before the sun rises. Solar…from onsun.app
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