1
Your location
Your postcode and where the panels would go. We look up your area's typical solar output.
For a UK home with a smart meter
Would plug-in solar actually pay off?
A four-step check that runs a year of your half-hourly electricity use against your local solar and your tariff, and tells you what a small plug-in kit would save — kit by kit.
Start the checkHow it works
2
Your usage
Upload a half-hourly CSV from your supplier or smart-meter app. It is read in your browser only.
3
Your tariff
Your unit rate and standing charge — single-rate or time-of-use. We work out this year's bill.
4
Kits & savings
Real plug-in kits ranked by payback against your own numbers, with links to each retailer.
A useful estimate, not a sales promise
Your year of half-hourly readings is simulated interval by interval against a representative day for each month and the local solar profile — self-consumption, battery charge and discharge, export and inverter clipping are all modelled, then priced against your tariff. Shading, orientation and day-to-day weather still move the result, so treat the figures as a guide, not a promise.
Plug-in solar became legal in Great Britain on 27 August 2026, and only as a complete, certified product — check current product and DNO rules before connecting generation or storage. Your CSV is parsed locally in your browser and never uploaded; usage analytics are cookieless and carry no personal data. More in our privacy note.