24v dc to 72v dc

Thread Starter

siriggy

Joined May 14, 2007
5
Hi could anyone help, i have a UPS which has 6 x 12 v batterys in series. and i would like to charge it with 24v dc. can this be done.
steve
 

Thread Starter

siriggy

Joined May 14, 2007
5
my inverter needs 72vdc, how can i charge the batterys with 24vdc from the bus alternator, if all the batterys are in series.

steve
 

Papabravo

Joined Feb 24, 2006
13,550
The short answer is no. The only way I can see doing what you want is to change the configuration during charging. The charging voltage needs to be larger than the battery voltage in all cases that I am familiar with. Where exactly did you get this fancifal notion?
 

JoeJester

Joined Apr 26, 2005
4,259
I misread the question.

Since you have a UPS, it already has a charging circuit to charge the battery pack [6 x 12]. Why would you want to charge them with a 24 volt supply?

What is the problem with your UPS?
 

Thread Starter

siriggy

Joined May 14, 2007
5
i am converting a bus into a mobile home and want to use the ups as my 240vac supply but i need to charge it on the road, i will plug in in 240 at caravan park.
steve
 

Johann

Joined Nov 27, 2006
190
i am converting a bus into a mobile home and want to use the ups as my 240vac supply but i need to charge it on the road, i will plug in in 240 at caravan park.
steve
Perhaps someone can come up with a DC to DC converter that will do the job? I did a google search on the topic, found many, but not in that voltage conversion range.

It could be a challenge to try and convert a vehicle alternator to a higher voltage (with the correct regulation) and fit it as a second alternator to your motor home.
 

JoeJester

Joined Apr 26, 2005
4,259
Some owners of a Class A mobile home will run their generators while driving down the road to charge their UPS and run the roof top Air Conditioners instead of running the normal vehicle Air Conditioner.
 
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