Thinking about 72 volts

[Eldon]

Andy had said he uses a 36 volt charger for his 72 volt cart. I want to know if I hook up the charger to batteries 1-3 to 36 volt and batteries 4-6 to 36 volt do I need to disconnect the battery cable from 3 to 4 before charging.

 

[Eldon]

It will be six 12 volt batteries if I go this route

 

[HotRodCarts]

No, you won't have to unhook the cables.

 

[gornoman]

I believe Andy uses 2 36v chargers at once as you described, no wires removed. I use a similar setup to get my 48v cart charged. Works fine.

If you just use 1 charger, it will need to run 2 complete cycles. Do not try to parallel the twin 36 banks to the single charger. The transformer is not rated for that duty cycle.

 

[JRay]

He uses one 36 volt charger, so they charge the same.

 

[Andy4639]

After talking with Guroo Nate on this I have only used the same charger on both set's that way I know they charge the same, when I say the same I mean by the charger being the same one. Nate pointed out to me that 2 differant chargers could have the set's out of balance from each other after a few chargers if they didn't have the same output ratings. Old verses new also would could effect it.

 

[Eldon]

So you charge one bank at a time or both at once. I thought you charged both at once thats why I asked about disconecting battery 3 from 4.

 

[HotRodCarts]

I've built a few 72 volt carts and have used two 36 volt chargers. You could always rotate the chargers if battery balance is a problem. If both chargers are working right it shouldn't be a problem.

 

[Andy4639]

I charge each set by themself. One charger.
One charger is just to easy. I don't have to have two chargers all the time.

 

[Eldon]

Thanks guys.