Show HN: Helios – what plug-in solar could generate for any address in Britain
Plug-in solar panels will be available in the UK soon, letting you generate electricity from your balcony without expensive installation fees or planning permission.
Enter your postcode and house or flat number to see how much energy you could generate, and whether it’s likely to be worth it.
We resolve your postcode against Ordnance Survey data, ray-trace the surrounding buildings from Environment Agency LIDAR, then ask PVGIS for an annual yield given the shading we found. We have no database — your address isn't stored.
Postcode is required. House number or flat is optional — we use it to pinpoint your building for this calculation, not to store your address. Privacy.
Ground floor is 0. Higher floors clear more obstructions but also shift the solar peak season.
Pick the compass direction the panel will point. South is typically best in the UK; east and west still produce well.