31 Mar '16, 3pm

Redflow Introduces Its 10kWh ZCell Battery Storage System In Australia

This one is interesting as the first flow battery aimed for home use. Its pricey and some of the claims don’t add up, like the one about cooling. It does have a fan. The thing is so new that the website keeps explaining that they are doing tests and don’t have answers. There are references to some of the tech problems like dendrites and solution temperatures, gelling, etc., on many sites. Efficiency is notably absent from the company description, but the paper shows it in the range of about 60 to 70%. ZBr flow batteries have some unique characteristics. They need to do something called a “strip cycle” every 1 to 4 cycles to get them ready for another cycle. It removes excess zinc from the stack and takes 0.5-2 hours. This is probably not a problem for grid tied residential storage. http://redflow.com/wp-content/uploads/2014/10/Rose-and-Ferreira-Performance-Testing-of-ZnBr-...

Full article: http://cleantechnica.com/2016/03/31/redflow-introduces-it...

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