Can I charge UPS batteries one by one without degrading it?

[marsworm]

So my client ordered a UPS with six large batteries inside. The six 12V 250AH batteries should be connected in series and parallel to produce 24V 750AH output, refer picture attached.

However, due to contract reasons, my client asked me to deliver the UPS to them first, and to maintain the batteries myself for 1 year before delivering to them.
Now it would be very expensive if I buy another big 24V 750AH battery charger to charge the six batteries all connected together.

So I am thinking of buying a small 12V 250AH battery charger, and charge the six batteries individually one by one.

However, I heard charging the batteries one by one instead of together would alter the charging curve of the batteries. So my question is how much is the degradation to the batteries performance, is it negligible?

 

[IRstuff]

What does your contract require?

TTFN
faq731-376

 

[itsmoked]

Negligible.
That's a fine solution.

I'd use a much smaller charger though. Probably a couple of them. You want one that goes into float or cutoff.

Consider 3 of the Juniors

http://batterytender.com/automotive.html

Swap them the first of every month to the other three batteries. Swap them as soon as they reach cut-off just before you install the bank. (so there isn't a month between charges at installation)




Keith Cress
kcress -

http://www.flaminsystems.com