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Tesla batteries could power homes and businesses

US electric carmaker Tesla Motors has unveiled a rechargeable lithium-ion battery that could power homes and businesses.

The Tesla Powerwall is designed to store energy at a residential level for load shifting, back-up power and self-consumption of solar power generation.

It consists of Tesla’s lithium-ion battery pack, liquid thermal control system and software that receives dispatch commands from a solar inverter.

Tesla states the Powerwall increases the capacity for a household’s solar consumption, while also offering back-up functionality during grid outages.

The 7kWh unit will retail at $3,000 (£1,954) and the 10kWh unit at $3,500 (£2,275) for installers. Deliveries begin in late summer.