Run the laundry, dishwasher and car charger at the cheapest, sunniest times.
1+ downloads
About OnSun: Solar Forecast & Save
OnSun: Solar Forecast & Save is a weather app developed by VIREO ENERGY PTY LTD.
Download Statistics
OnSun: Solar Forecast & Save has been downloaded 1 times. In the last 30 days, the app was downloaded 1 times.
User Ratings
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App Information
OnSun: Solar Forecast & Save is FREE to download. The APK download size is 42.31 MB. The latest version available is 2.0.0. The last update was on July 3, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play 2 weeks ago.
Description
Want your solar to pay for itself faster? Want to lower your energy bills? It comes down to timing - using your power while the sun's up, not buying it back after dark. OnSun forecasts your solar seven days ahead and tells you the best time to put the laundry on, charge the car or run the dishwasher, so you use more of your own power and buy less.
No solar inverter integration. No extra hardware. OnSun works from your system's location, size and the local weather - nothing to install except the app.
The problem is the same everywhere: solar peaks in the middle of the day, life happens at either end of it, and whatever you don't use gets sold off cheap and bought back expensive.
Most of us mean to use more of our solar power and just… don't. Your inverter app won't fix that - it only shows what already happened, when the chance to do anything is gone. OnSun looks ahead instead. It plans your week around the sun, shows the sunniest days and reminds you when to switch each appliance on.
HOW THE SOLAR FORECAST WORKS The forecast is what makes OnSun so powerful, so here's how it's built. Looking seven days ahead, OnSun starts with professional weather forecast data, then models how much of that sunlight your panels will actually capture to feed your house, based on their location and size. It's the same modeling used for large commercial solar systems - now in your pocket.
HOW THE SCHEDULING WORKS Every appliance draws power differently, a dishwasher runs in short bursts, a car charger pulls for hours, heating and cooling are different again. OnSun matches each appliance's power profile against your solar forecast, finds the window with the most sunshine, and tells you when to start. Set it once, and OnSun reminds you when it's time.
ONSUN FREE vs PRO Free: • 3-day forecast • 2 appliances Pro: • Full 7-day forecast • Unlimited appliances • More frequent forecast updates • Long-term savings and self-consumption insights, so you can see how your habits change over time
You paid for the solar system. Download OnSun free and put your solar to work.
Terms of Use: https://onsun.app/terms-of-service.html
Recent changes: The biggest update to OnSun yet, with a full redesign from top to bottom.
New this release: • A confidence range on your solar forecast, so you see the likely best and worst case. • Appliance profiles that match how each one really uses power across a run, from a dishwasher's short bursts to an EV's long charge. • More frequent forecast updates and in-app ratings. • A long list of fixes and improvements.
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