Commercial battery storage ROI calculator

Work out battery payback for an office or other small commercial site from the unit rates on the bill.

Commercial here is the overlap between home storage and smaller industrial storage. The list includes home batteries, because those are the ones that suit offices and SMEs, plus any small industrial batteries in the shop.

• Annual electricity use and how much of it falls outside working hours
• Solar generation, if the site already has panels or they are going in with the battery
• Day rate, off-peak rate and export rate in pence per kWh
• Shop price, payback year and a year-by-year saving table for the battery you select