Four fire engines and around 25 firefighters tackled a flat fire on Kilburn Park Road.
Four solar panels on the roof of a residential block were damaged by fire. Around 20 people left the building before the Brigade arrived. There were no reports of any injuries.
The Brigade’s 999 Control Officers took 10 calls to the blaze.
PVStop, which is a black liquid polymer coating designed to cover solar panels like a liquid tarpaulin, was used. It works by blocking the sunlight that powers solar panels, so the process of converting light into electricity is stopped. The panels are then de-energised, and the risk of electrocution is greatly reduced so crews can get closer and prevent fire spreading from a roof to the rest of the building.
The Brigade was called at 1100 and the fire was under control by 1139. Fire crews from North Kensington, West Hampstead, Paddington and Soho fire stations attended the scene.
The fire is believed to have been caused by electrical resistive heating.
