120W semi-flexible solar panel - 2.3kg

The panel from our 720W balcony, garden and workshop system, sold on its own for adding to an existing array or replacing one. It is semi-flexible rather than framed glass, weighs 2.3kg, and fixes to a railing or the side of a garden building with straps and fittings rather than drilling - the weight is what makes balcony mounting practical several floors up. Listed at £79 at the time of writing; prices change, so the listing is authoritative.

Pair it with the Hoymiles HMS-800-Pro micro-inverter, which is stated as registered on the UK ENA Register; the Government's interim product specification allows up to 2,000W of panels behind an 800VA inverter, and extra panels do not raise the inverter's output. Ravair supplies the kit and manuals and does not install. Read balcony solar panels for UK flats for how the panels are used.