There is no amp hour meter in the system. The dump load on the Whisper sounds like a possibility... Batteries are 4ks21 Surrettes with an 1100 a/h rating @20hr rate and should have plenty of life left in them. They have been eq'd on a regular basis and maintenance has been good. Alas the customer doesn't own a multimeter so can't check the individual battery voltages but has checked each cell with tubular hydrometer and tell me that all cells are in the green. They may misread a hydrometer but the colour is easy to see so I'm pretty sure they don't have a bad cell.
Ron earthRight Products - Solareagle.com Alternative Energy Solutions ~ Renewable Energy Products On 2011-10-08, at 11:20 AM, jay peltz wrote: > HI Ron, > > Do you have an amp hr meter in the system? > > When you say 15 min of genny brings the batteries back up, back up to what as > you also say, 2 hrs later they are at 25.8v? > > I would guess the problem is the dump load controller on the Whisper, its > turing on for some reason, draining the batteries. > > But for me without an amp hr meter, hard to really know what is happening > overnight ie was there really a drain on the system? > > jay > > peltz power > > On Oct 8, 2011, at 11:01 AM, Ron Young wrote: > >> Howdy Wrenches, >> >> One of my customers that lives 3 hours out in the back country is having an >> intermittent problem that I haven't encountered before. The batteries drop >> rapidly in voltage but hydrometer readings are in the green. Turning off the >> inverter and just using DC doesn't change anything. Meters on the Mate, >> Outback MX and Whisper controller are all the same so it's not a metering >> problem. On the way to bed the batteries were at 25.4, overnight with no >> loads they dropped to 22.9 then a short 15 min. charge with a generator >> brings the batteries back up and two hours later they are at 25.8. This >> scenario has occurred several times and then doesn't appear for a day or two. >> >> It doesn't seem to be sulfation as the batteries are reading good on the >> hydrometer every time. All cells check out. The inverter doesn't seem to be >> the problem. They have a Sunfrost on a separate DC circuit. It sounds like >> an intermittent circuit problem or electronics issue. Customer has checked >> and tightened all the connections he can get at but hasn't been inside the >> components. Would appreciate any suggestions or clues before I make the trip. >> >> Ron Young >> >> earthRight Products - Solareagle.com >> Alternative Energy Solutions ~ Renewable Energy Products >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: [email protected] >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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