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The devices could help stabilize the grid, and make charging electric cars cheaper.
New direct-drive turbines promise to lower the cost of offshore wind energy.
GE is pushing the smart grid and thin-film solar, but don’t expect new kinds of nuclear reactors.
Regulations, privacy and security concerns, and other issues could hold back developments.
Without a radically expanded and smarter electrical grid, wind and solar will remain niche power sources.
The U.S. nuclear industry hopes that safer reactor designs can end decades of stagnation.
New metals will keep engines and turbines dry and ice-free.