Chris, In theory the upgraded batteries should be able to accept a greater current (or at least max charge current) for a greater length of time than the prior battery bank. I once had a propane genset run rough when it was starved for fuel, due to an undersized upright propane cylinder which could not evaporate the liquid propane fast enough for the load of the genset. This caused the regulator on the genset to have awful difficultly, and usually would drop the load because it couldn't stabilize. This doesn't sound like it would be your problem, if it was running properly before, but perhaps the longer duration at higher current is creating difficulty for the LPG to evaporate enough. May be compounded if the fuel tank was recently overfilled and doesn't have as much surface area, or if it is way low and can't maintain pressure. May want to check the tank size of propane for the genset. (I'm assuming this is LPG).
Mike Kocsmiersky Principal Phone: 413 883-3144 Spirit Solar www.SpiritSolar.net -----Original Message----- From: Chris Daum [mailto:ch...@oasismontana.com] Sent: Thursday, April 21, 2016 3:41 PM To: 'RE-wrenches' 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 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
