Battery Backup
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In Some States, PV is Getting Cheaper Than the Grid
A rooftop solar company hopes to build a microgrid that will provide residential electricity at a lower cost than the grid
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Solar Power Battery Backup
Solar-plus-storage means more versatility, potential savings, and protection when the grid goes down
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The Science of Batteries
It started with copper and iron, but the future of batteries is likely lithium ion
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Planning for Backup Power in an All-Electric House
A homeowner in Kentucky eyes a solar array to keep his house running in the event of a power outage
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Tesla Will Sell Home Batteries
The electric vehicle manufacturer plans to offer two versions of a lithium-ion battery for home use. Solar installer Sungevity announces its own plan.