A dormer bungalow in Cardiff

Dormers break a roof into smaller planes. We drone-surveyed the roof and placed nine panels across the two sunniest sections to avoid the chimney shadow in the afternoon.

What we fitted

Nine panels with optimisers on the shaded string, a hybrid inverter and a 5 kWh battery with backup for the fridge, boiler and router.

Year one

The battery covered the evening peak most days from March to October, and kept the house running through a two-hour power cut in February.