[ausev] question about chargers

[Joby Wieser]

Greetings,

My car is a 1975 VW beetle converted into a flat bed truck, it uses one of those old Jack & Hintz motors.  It is running at 48 volts right now.  My altrax controller burned up because it was underrated, I just ordered their heaviest duty controller which will work at 72 volts so I am thinking about adding 4 more batteries to the stack.  I just bought a 48 volt automatic charger and I don’t want to waste it.  Has anyone used 2 separate chargers to charge different groups of batteries in a series stack?   I could buy the same brand charger for the extra 24 volts so the full charge voltage should be the same per battery.  Are the known problems with doing this? 

Joby