[ausev] question about chargers

[Mark Farver]

Usually this is safe, because most smaller chargers are isolated.

However, there is almost no good way to know from the labeling if it
is in fact isolated.  Two non-isolated chargers will short out the
pack and probably blow themselves (or at least their output fuses) up
unless you use a contactor to split the pack into two electrically
isolated chunks..

Mark

On Thu, Oct 16, 2008 at 8:04 AM, Joby Wieser <sleeper02_14_06 at yahoo.com> wrote:
> 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
>
>
>
>
>
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