You may laugh at this big battery but it could cut your bills by 70%. This £2,500 battery, combined with rooftop solar panels, can slash household power bills by up to 70%. Electricity and gas demand have been falling, incrementally, for the past five years owing to more efficient household appliances and better insulation. Batteries that can soak up cheap or even free power during the middle of the day, then discharge it at peak evening times — when power is most expensive — would dramatically speed up that drop in demand. They could also unleash renewable technologies that today remain tethered to the blowing wind and shining sun, and sweep away the business model of the big six utilities, who for the last half-century have flogged electricity to passive, disengaged customers from fossil-fuel power stations.
Sunday Times 13th March 2016 read more »