By Lou Covey
This is part two of a three-part series. See part one here.
As the renewable energy industry rushes headlong into the distribution of expensive and toxic energy storage technology, there are signs that cheaper, cleaner, more efficient technologies will emerge soon, two of which were on display at Intersolar.
Flow batteries have been around for several decades, but the clamor for storage systems has brought them out of the labs and into commercial development of late. A flow battery is combination of a fuels cell and a rechargeable battery. The difference between conventional batteries and …