wonder watt
Power your tomorrow, today!

Smart and predictive charging
based on solar forecast

   

Testimonials

“I've been using Wonder Watt for around a week or so now, and it seems to be doing exactly as it says on the tin.” ― mrtnbcky

“Great web app. Been in touch with the developer and now it works with AC coupled inverters too!” ― Joe

"Automatically reverting to Eco-mode after grid export is good news for the GivEnergy community, and a real benefit of Wonder Watt." - Martyn

Read more testimonials on our dedicated page.

We support six inverter brands: Growatt, GivEnergy, Solax, AlphaESS, Solis and FoxESS. If you have one of those with battery storage, you can access our Wonder Watt web app dashboard here: https://app.wonderwatt.com - note that you will need a Google account to login.

Get FREE access now!

See our supported inverters page for what works with each brand. Our aim is to support more inverter manufacturers in the future.


Optimise Your Solar

Our platform predicts your solar yield based on the weather forecast, in order to create dynamic charging schedules tailored for your solar storage system.

Maximise Your Profits

Get the most out of your export tariff by harnessing the full potential of your solar energy production.

Extend Battery Life

Wonder Watt intelligently manages charging and discharging rates to maximise your battery's lifespan and maintain optimal performance.

Set and Forget

Enjoy hands-off automation with our seamless scheduling integration – Wonder Watt takes care of everything, so you don't have to.

No unnecessary charging

Our smart scheduling saves you money by preventing unnecessary battery charging during off-peak tariffs when high solar yield is expected.

Octopus Agile & IOG

Smart integration with innovative tariffs like Agile Octopus and Intelligent Go.

Earn with Axle

Your battery can now earn money supporting the grid. When an Axle export event starts, Wonder Watt exports for you automatically, and everything else stands aside so nothing charges while you are being paid to sell.

Wonder Batt BETA

Full automation with no schedules to configure at all. Wonder Batt plans 48 hours ahead from your forecast, tariff and battery, and re-plans as the day changes. See how it works.