wonder watt
Power your tomorrow, today!
wonder watt
Power your tomorrow, today!
Try everything for 14 days with no payment details. If it works for you, pick a plan when your trial ends.
£65 billed once a year
These prices apply from 1 December 2026. Until then, the annual plan is £54 a year and the 3-monthly plan £17.99. Already subscribed? You keep your current price until your next renewal on or after 1 December 2026.
Joined Wonder Watt before October 2024? Your discounted 3-monthly plan is £5.99 a month (£17.97 every 3 months) from your next renewal on or after 1 December.
Prices include everything below. Outside the UK, equivalent prices are shown in US dollars.
...In the last 4 weeks, I've earned 64% more for the electricity I exported than I would have received on fixed 12p outgoing...
...My export revenue has increased 70% on average... This has been a game changer for me...
Just completed my first month on Agile and have to say I'm pretty impressed - spent 60% less compared with roughly the same energy as last month on economy 7.
Share your link from the app. When a friend joins through it and pays for their first subscription, you both get an extra month free. How it works.
Nothing is charged automatically: there are no payment details to charge. Wonder Watt asks you to pick a plan, and your schedules pause until you do.
Yes. Turn automatic renewal off at any time in the app and you keep access until the end of the period you've paid for. You can turn it back on before then.
Refunds are in full, no quibble, within 7 days of purchase. Between 7 days and 6 weeks, refunds are proportional to the time left on your subscription.
No. Wonder Watt is a web app that talks to your inverter through its manufacturer's cloud. No Home Assistant, Raspberry Pi or home server. A Google account is all you need to sign in.
Wonder Watt works with Growatt, GivEnergy, Solax, AlphaESS, Solis, FoxESS and Sunsynk inverters with a battery. See everything we work with.
Yes, yourself, in the app, under Subscription.