Those 2v cells work-out much dearer , than ready made battery bank 12 v .
The 2v cells take heaps of caring, if one cell runs low on electrolyte it could ruin the battery-bank .
The fork lift batteries I can get , here in Sydney, have a cell defunct & they find it cheaper to sell them " as is " .
Remade from 72 v to 48 , with a 12 v spare . Except for the weight & handling I would have bought one .
spacesailor