By Jason Deign
Grid-scale energy storage projects are still a challenge for US utilities, according to a new report from Energy Storage Report sponsor Energy Storage Update.
The free US Energy Storage Projects and Prospects Guide 2016 focuses on three leading battery plants and reveals two of them have experienced significant setbacks since they started.
Notrees, which is owned by Duke Energy in Texas, and Tehachapi, belonging to Southern California Edison (SCE) in California, both had problems with battery vendors and have subsequently had to overcome additional hurdles.
At Notrees, a 36MW, 24MWh plant that was commissioned in October 2012, the original battery provider, Xtreme Power, went out of business. The vendor’s assets ended up with the German energy storage project developer Younicos.
At the same time, however, Duke discovered the advanced lead-acid batteries installed by Xtreme were a poor fit to the storage applications emerging at Notrees, which was leading to more rapid battery degradation than expected.
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