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A startup, Halotechnics, is building a pilot electricity storage system that will use molten salt.
ARPA-E faces a tricky mandate—invest in risky technologies that no one else wants to fund, while still showing results.
Software is taking over cars. But it may be a while before it can be updated without a trip to the dealer.
The company has managed the nearly impossible for a solar startup over the last few years: it is still in business.
The electric car company’s CTO explains what’s going on under the hood.
By making a cheaper LED lightbulb, the newcomer to the industry hopes to dominate the market for energy-efficient lighting alternatives.