MARC StudioRun your appliances on your own sun.
Solar Planner tells you the best time to run the washing machine, dryer and dishwasher, using the weather forecast, your battery and your home's usual use.
Works in your phone's browser. Add it to your home screen like an app.
Three steps, then just follow the plan
Open it on your phone
Go to solar.marinearc.com and add it to your home screen (iPhone: Share, then Add to Home Screen; Android: menu, then Install app).
Tell it about your home
Your postcode, panels, battery and tariff. If you have a FoxESS inverter, connect it with a read-only key.
Follow the plan
Each morning you get a start time for each appliance today and tomorrow, with the reason.
Know when to press start
A plan for today and tomorrow made from the forecast, your battery level and your usual use. Re-plan any time from now.
Usual-time windows for each appliance, and an option to run overnight on cheap rates.
Gets better every day
Compares the forecast with what your panels really made, learns how your roof performs, and shows how accurate the forecast has been.
See what you save: three bills side by side, priced on flat, Economy 7, custom or Octopus tariffs.
Spots when appliances run
Reads your FoxESS inverter read-only, notices when a big appliance has run, and keeps a simple log. It never changes your inverter's settings.
More inverter brands (Solis, Growatt, Sigenergy) are coming.
See it in action
Videos open on YouTube.
Free to use. Coffee welcome.
Solar Planner costs nothing to use. If it saves you money, you can buy us a coffee. It helps pay for the time that goes into new features and new apps.
- The app
- £0.00
- Your account
- none needed
- Ads
- none
- Your data sent to us
- none
- Total
- £0.00
Thank you for using it.
Good to know
Is it really free?
Yes. There is nothing to pay and no account to make. If it helps you, you can buy us a coffee.
Where is my data kept?
On your phone. Your settings, history and inverter key stay in your browser. Nothing is shared or sold.
Do I need a FoxESS inverter?
No. Without one, the plan uses the forecast and the details you enter. With FoxESS, it also reads your live solar, battery and home use (read-only).
Can it change my inverter or battery settings?
No. The key is used read-only, and the app never changes your inverter's settings.
Does it work in Northern Ireland?
Not yet. It covers England, Scotland and Wales.
How accurate are the numbers?
All figures are estimates. The app shows how close the forecast came to what your panels made, so you can judge for yourself.
Ready to use your own sun?
Open Solar Planner on your phone. It takes a few minutes to set up.