UP In Arms, page-67

Thanks@Burlzey
It was a good read.
Unfortunately that article is 5 years old.
So not relavent to if Redflow is a good investment today or not.

Here is a recent comparison (Jan 2019) of Li-ion to Redox battaries.
https://blogs.dnvgl.com/energy/can-flow-batteries-compete-with-li-ion

So ZnBr or other chemistries?
I doubt any single chemistry will be the answer in all situations and there will be room in the market for all.