1
Your location
Enter your postcode and where the panels would go. We pull the local solar yield from PVGIS.
UK PLUG-IN SOLAR ESTIMATOR
Would plug-in solar
actually pay off?
A guided, four-step check that uses your real half-hourly electricity use, your location’s solar yield and your current tariff to estimate what a small plug-in solar kit would save you — projected from the last year, 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
Add your unit rate and standing charge. We work out what a year of electricity costs you now.
4
Kits & savings
See real plug-in solar kits ranked by payback against your own numbers, with links to buy.
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.