Interesting -- I'd never heard of this battery tech -- but I thought most personal off-grid battery banks were lead acid. Google "lead acid vs nickel iron" and

Interesting -- I'd never heard of this battery tech -- but I thought most personal off-grid battery banks were lead acid. Google "lead acid vs nickel iron" and you'll get some discussions on solar power / off-grid forums. I skimmed these, and it seems like any advantage nickel iron has doesn't justify their greater cost.