[RE-wrenches] Battery charging problems

[Kevin Pegg]

Hi Chris, 

The problem summary is a bit light on details to be too specific. What, precisely, does a generator running "rough" mean? Overheating? Smoking? Breaker tripping? 

THE MS4448 has about 3 kW charging capability (63A @ 50 VDC). So the 8.5 kW Kohler should be able to handle that easily, depending on what else is running. Derating the charge capacity to 1.5 kW not sure what that would accomplish other than burning more fuel. 

Sounds like perhaps a generator service is in order. 

Kevin

-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Chris Daum
Sent: April-21-16 12:41 PM
To: 'RE-wrenches' <re-wrenches at lists.re-wrenches.org>
Subject: [RE-wrenches] Battery charging problems

 Dear people:  

I have an off-grid customer who has, in his system, a Magnum MS4448 and 16 of the Rolls S550 batteries, a Kohler generator (and Trimetric meter and other components).  He upgraded his batteries this past March, and since he's installed his new batteries, the generator is running 'rough'.  He's at a great distance from our shop so a local business helps him from time to time. They believe that the "batteries are too  powerful for the 8.5 kw generator" and recommended  running it at 50 percent charge control. After 3 hrs run, it seems to help but will mean more run time for his generator (and hence, use more fuel).  Have you ever heard of anything like this?
Everything ran fund before the battery upgrade.

Thanks for your input!

Best,

Chris Daum
Oasis Montana Inc.
406-777-4309
406-777-0830 fax
www.oasismontana.com



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