Tesla’s batteries could be bigger business than electric cars – Elon Musk

Tesla’s new energy storage systems could become a bigger business for the company than selling cars, Elon Musk has said. The company has taken 38,000 orders for its Powerwall, which was first announced last week, meaning the devices are sold out until mid-2016. The two versions of the “Powerwall” – a 7kWh and a larger 10kWh unit – cost $3,000 (£1,975) and $3,500 (£2,300) respectively.