OnSun

Plan appliance use around expected rooftop solar output

Meet OnSun

OnSun forecasts how much electricity a rooftop solar installation is likely to produce and helps households plan appliance use around it. Users enter their location, panel capacity, roof direction, and tilt. The app combines those details with weather forecasts to show expected production through the day, without requiring an inverter connection or additional monitoring hardware.

Appliance profiles help schedule activities such as washing clothes, running a dishwasher, or charging an electric vehicle. Reminders indicate when to start, while usage and savings views summarize the planned activity. OnSun offers a short forecast in its free version and a longer planning window through its subscription, supporting everyday decisions about using more locally generated electricity.

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Product details

Website: onsun.app
Status: Launched
Category: Climate & sustainability
Listed: Oct 22, 2026

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