Quote:
Originally Posted by Fuzz
Note that the big one installed in Australia is 129MWh.
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An Australian website that commentates on its country's electricity system had an article that discussed the operations of the battery. One interesting finding was that the round-trip efficiency is relatively poor. Based on their numbers, it appears that you only get about 67% of the electricity back (HPRG1 is when the battery was outputting, HPRL1 is when the battery is charging).
http://www.wattclarity.com.au/articl...about-storage/
So that would further increase the costs because your generation capacity needs to be higher, and your battery has to be bigger to account for those losses. While Alberta doesn't get the heat of Australia, extreme cold is as detrimental to li-ion batteries as extreme heat so energy would be needed to maintain an optimal temperature for the batteries, which ironically would probably be cheap NG during winter.