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Tesla announces home battery plans

Published 01/05/2015

Elon Musk unveils Tesla's new Powerwall. (AP)
Elon Musk unveils Tesla's new Powerwall. (AP)

Electric car company Tesla has announced plans to expand into battery technology to power homes and businesses.

The firm's CEO Elon Musk unveiled the plans at the company's design studio near Los Angeles International Airport.

"Our goal here is to fundamentally change the way the world uses energy," he told reporters gathered in Hawthorne, California.

Although Tesla will make the battery called Powerwall, it will be sold by a variety of other companies. The list of partners includes SolarCity, a solar installer founded by Mr Musk's cousins, Lyndon and Peter Rive. Musk is SolarCity's chairman and largest shareholder.

The system will carry a suggested price of 3,000 to 3,500 US dollars depending on capacity.

"I don't believe this product in its first incarnation will be interesting to the average person," conceded Peter Rive, SolarCity's chief technology officer. Mr Rive, though, still expects there to be enough demand to substantially increase the number of batteries in homes.

Mr Musk believes Tesla and other future entrants in the market will be able to sell two billion battery packs around the world - roughly the same number of vehicles already on roads.

The batteries are likely to become more useful if more utilities and regulators allow power prices to change throughout the day based on market conditions. That way, the software that controls the solar and battery system will allow customers to use their home-generated power - and not expensive grid power - when grid prices spike.

Several businesses, including Amazon and Target, plan to use Tesla's battery storage system on a limited basis. Southern California Edison is already using Tesla batteries to store energy.

Tesla is building a giant factory in Nevada that will begin churning out batteries in 2017.

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