Is that open to new customers? Forget the car -- topping up a 20kWh battery for £1.50 a day sounds like a great deal for people paying 34p per unit at the mome

Is that open to new customers? Forget the car -- topping up a 20kWh battery for £1.50 a day sounds like a great deal for people paying 34p per unit at the moment, would save £150 a month.