enter the powerwall, the £6,000 home battery stores energy gathered from solar panels during the daynably powers your pad. it's very straightforward really, not that complicated. from tesla to ikea, there seems to be a growing trend in companies creating home batteries to harness solar power. so how exactly does this work? tech enthusiastic terence has had solar panels for several years. more recently connecting them to a home battery, meaning he can use the power he generates and send excess back to the grid. the battery charged up 1.4 kilowatt hours, which it then used throughout the day, so that saved about 15% on energy bills. he's also using it to power his electric vehicle and thanks to the way that feed—in tariffs currently work in the uk, he's being paid for the power he generates even when he uses it. but of course it's early days for the technology. one of the things we're going to see over time is these batteries will become cheaper, smaller and higher capacity. at the moment this battery is two kilowatt—hours, which is great, but it's not quite enough for everything we wa