I've done a bit of research on batteries and I haven't seen too many people mention vanadium redox flow batteries (VRFB) for grid storage. While lithium ion bat

I've done a bit of research on batteries and I haven't seen too many people mention vanadium redox flow batteries (VRFB) for grid storage. While lithium ion batteries have great energy density (necessary when you need to carry your energy) they deteriorate over time leading to continual capital expenditures. From what I've read, it seems like the VRFBs can basically run forever with minimal maintenance. If I were betting on large scale grid battery storage technologies I think this is where I would be interested in putting my money. While they are less energy dense, it doesn't really matter since most houses are stationary.