A home battery system typically costs £3,500 to £6,500 installed, depending on the size you need. Most of our customers go for a 5 to 10 kWh unit.
The batteries we install are:
Tesla Powerwall 3 — 13.5kWh capacity. With Tesla's backup gateway, it keeps your lights on during power cuts. Especially popular with rural properties in Stirlingshire and Perthshire where outages can last days. Around £8,000–£10,000 installed.
Sigenergy SigenStor — A modular battery and energy-management system, suited to combined solar, battery and EV installations. Capacity is specified to your usage.
Both batteries qualify for 0% VAT until 31 March 2027, saving you around 20%.
A battery makes financial sense if you have solar panels (store daytime generation instead of exporting it) or if you are on a smart tariff like Octopus Go (charge at 7p/kWh overnight, use stored energy during peak hours at 24p+/kWh).
Mackie Electrical Services retrofits batteries to existing solar systems — including systems installed by other companies. We assess your setup during a free survey and recommend the right capacity based on your usage.