However, if the chargers have different charging characteristics, then all bets are off. For example, based on my experience with fixed-voltage ferro-resonant chargers (e.g., the Lester golf cart chargers and the G.E. chargers) the "25-amp" charger will likely never actually deliver 25 amps to the batteries, and if it does, it will be for a very brief period until the pack voltage starts to rise in response to the charging. The voltage will then taper to a "finishing" (equalization) current, which should be around 2-3 amps max.
On the other hand, some of the newer technology constant-current chargers (or 3-stage chargers that include a constant-current stage) will continue charging at the stated rate (e.g., 4 amps) until they reach the pre-determined voltage set-point. It's worth making sure you are comparing "apples to apples" when it comes to chargers.
Darryl McMahon Chapin, Tim wrote:
Are 6 4 amp 6v chargers hooked one to each battery comparable to 1 36v 25 amp charger? I.e. does the amps get split up between the batteries in a single charger so that each battery is seeing basically 4 amps?
-- Darryl McMahon http://www.econogics.com It's your planet. If you won't look after it, who will?