RE: (ET) A charger question

["Elie, Larry (L.D.)" <lelie ford com>]

I have not seen a commercial charger (other than a 1 Amp cheap trickle 
charger) that wasn't isolated.  
Any charger that is truly isolated can be connected the way you describe.  
You can check the isolation 
with a good meter.  I have done what you describe; it works.

Having said that, be aware that depending on the size of the chargers, you 
may exceed a 15 amp, or even 
a 20 amp circuit.  It isn't likely to happen with a $19 charger, but read 
the input current spec first.  
The GE charger isn't too bad; about 20 amps at 42 volts on a single 
circuit.  I doubt that the 3 will 
charge faster, but they will give real nice equalization.

Larry Elie


-----Original Message-----
From: Roy Vanderhoef [mailto:Roy Vanderhoef verizon net]
Sent: Tuesday, July 15, 2003 1:49 PM
To: elec-trak cosmos phy tufts edu
Subject: (ET) A charger question


I will warn you before you read this, it might be a dumb question, but
one I do not currently know the answer to, but would like to. 

Harbor Freight has $19 12 volt auto chargers.  I know I could buy three
of these and hook them up across the 3 sets of batteries. The question I
have is could I hook the three of them together in series (that is
positive to negative) and then simply connect them across the full
battery pack or directly in to the ET charger out put line???  

If so for $60 + a little wire and connector ends you could rig up a nice
auto 36 volt charger system.


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