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Battery Storage

How a lithium-ion battery works

A short video from Washington Post describing how lithium-ion batteries work. The first electric battery was invented in 1800 and most batteries built since have basically worked the same way. What makes lithium-ion batteries different are the materials that make it lighter, rechargeable and longer-lasting. 

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Grid Outages and the Magic of Frequency Shifting

This is the fascinating story of frequency shifting. Normal electric utility frequency is 60 hertz (Hz).  Solar electric inverters require the utility frequency to be at or near 60 Hz in order to operate.  During a grid outage, Powerwall effectively establishes grid quality power (120/240 volts at 60 Hz), allowing a nano grid to operate…

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Battery boom is expected to attract $1.2 trillion in investment by 2040

The global energy-storage market will surge to a cumulative 942 gigawatts by 2040, according to a new forecast from Bloomberg NEF published Tuesday, and that growth will necessitate $1.2 trillion in investment. Sharply falling battery costs is a key driver of the boom. BNEF sees the capital cost of a utility-scale lithium-ion storage system falling…

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Hawaiian Electric announces new NEM Plus program

The Hawaiian Electric Cos. have launched a new solar program this week called NEM Plus that allows net energy metering customers to add energy storage as well as extra panels to their rooftop solar systems — as long as the new equipment doesn’t export power to the grid. Customers may install new panels, battery storage…

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Tesla to FERC: Energy Storage, DERs Enhance Grid Resilience

Tesla last week stood up for energy storage and distributed energy resources (DER), telling the Federal Energy Regulatory Commission (FERC) that it should consider these assets carefully as it looks to define what makes a resilient power grid. In May 9 comments filed with FERC, Tesla said that, in the event of a threat to…

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Energy Sage review: Tesla Powerwall

From Energy Sage. Tesla Powerwall: the complete battery review Last updated 4/20/2018 Back in 2015, automaker Tesla Motors set its sights on the home energy storage market and announced the launch of its home battery product, the Tesla Powerwall. In the past, Tesla Motors has been praised for making high-quality electric vehicles, as well as…

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