GregLocock
Automotive
- Apr 10, 2001
- 23,756
I had been following Vanadium flow batteries, but vanadium isn't exactly cheap, and apart from a few niches they haven't taken off.
Iron chloride, OTOH, is practically free (seawater+red soil). There's something of the order of 6 of these being built. They aren't amazingly cheap sadly, build cost is of the order of $50 per kWh, for a 12 hour system, (I think) but of course you just add more storage tanks to get more hours.
Cheers
Greg Locock
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