What are the differences between FLA traction batteries (e.g. for forklifts) and stationary FLA batteries for use in backup, telecom and solar applications? The former are usually called "PzS" batteries and the latter "OPzS" (in Europe anyway). I know many on the forum are quite happy with their used traction batteries - would you still consider them a good buy if they were new and more expensive?
The traction bats also seem to have a choice between thinner plates but more of them, or fewer thicker plates for the same given capacity. (The total amount of material in the electrodes stays about the same). The Battery FAQ says thicker is better, but does it take the number of plates into account?
I don't know enough about how batteries work to compare, but here's an example from the same manufacturer for 2V 810Ah (C10) cells of type OPzS and PzS:
- 7 OPzS 811Ah with 7 plates, 42kg without electrolyte, 60kg with.
- 9 PzS 810Ah with 9 plates, 37kg without electrolyte, 46kg with
- 5 PzS 750Ah with 5 plates 31kg without electrolyte, 41kg with
- 10 PzS 800Ah with 10 plates 35kg and 44kg
The stationary batts are heavier even though they're rated to the same capacity (I double checked, they are all rated at C10). Then there's also a difference in the amount of electrolyte in the cell: almost double in the stationary batts!
I think market forces will always keep the traction batts at a lower price than the more specialized stationary ones, so the question is - if you had to spend good money on new FLA batts, would you still consider traction ones?