Solar guides

Plain answers to the questions we hear on site visits: sizing, system types, batteries, paperwork, cleaning and comparing quotes.

House with a tiled roof covered in black solar panels, late afternoonHow much solar do I need? A plain sizing methodYou can get close to the right system size with a pen, your electricity bill and four steps. This is the same method our sizing tool uses, written out so you can check it.6 min read