Hawaii has the most expensive utility rates in the nation because most of its electricity is generated using imported crude oil. But as a new law moves the state toward renewable energy sources that could lessen its dependence on fossil fuels, Hawaii may join several other states in rolling out a secret weapon — big batteries.
Experts speaking at the U.S. Energy Information Administration energy conference in Washington this week said batteries are quickly becoming a key part of the push to make renewable energy a bigger part of the U.S. power grid in a warming world.
Whether it's a Tesla Powerwall battery mounted on a garage wall or large batteries storing electricity generated from solar panels on Long Island, batteries could be a prominent part of how people use electricity in the near future.
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