As always, impressed and gratified by the number of thoughtful replies from Wrenches, thank you again! It looks like a hefty EQ is in order. I've successfully recovered badly sulphated batteries by putting them through multiple charge/EQ/discharge cycles on more than occasion. Will check out that Sunfrost as well. My mistake was believing that the hydrometer could tell the truth, the whole truth and nothing but the truth but apparently it takes an amp hour meter to keep it honest.
Ron Young earthRight Products - Solareagle.com Alternative Energy Solutions ~ Renewable Energy Products On 2011-10-09, at 11:12 AM, Jonathan Hill wrote: > Ron- > We've seen this issue before,and it is almost always due to badly sulfated > batteries. I'd try a LONG (8-12 hrs) EQ charge at 32 volts. We've done this > with Hawkers and fixed the problem. I believe the Surrettes could handle this > kind of charge, though you might contact Jamie Surrette. > > Jonathan Hill, senior system design engineer > Sierra Solar Systems > 563C Idaho Maryland Road > Grass Valley, CA 95945 > Celebrating our 31st year in solar! > tech info and foreign orders: (530) 273-6754 > order line: (888) ON-SOLAR (US only) FAX: (530) 273-1760 > e-mail: <mailto:[email protected]> > world wide web: <http://www.sierrasolar.com> > > Check out our 2 minute video at: > http://www.youtube.com/watch?v=WY-0UuabPEk > Because of the high volume of e-mail to which I respond, please > leave _all_ of the previous messages (unless it's unbearable) in > your reply so I can better remember your original message. > > > <att6eade.png> > > On Oct 8, 2011, at 6:42 PM, Ron Young wrote: > >> Thanks Bob but he has a tubular type hydrometer, not the pointer type. >> They're usually ok but I'll check it against mine when I go there which >> looks like a certainty. >> >> They EQ the batteries on a regular basis as per my instructions (they say) >> but will have to nail them down on that. The small 2500w generator worries >> me but they have 800w solar and a Whisper 100. The wind blows a lot. >> Inverter is a 3524 Outback. >> >> Ron >> >> On 2011-10-08, at 5:07 PM, bob ellison wrote: >> >>> I bet he has a cheap pointer type hydrometer, I have seen them be way off >>> from reality. >>> My guess is that the gravity is low the voltage changes quickly, specific >>> gravity changes slowly in a battery bank. >>> To fully charge a 24 volt bank you need to get it to 29 + volts and keep it >>> there for several hours, depending on the battery bank size. >>> Charging it to 25.4 is nothing in the long run. >>> Give them a LONG full charge, what are the inverters? Does it ever get an >>> EQ charge? >>> >>> Bob Ellison >>> >>> From: [email protected] >>> [mailto:[email protected]] On Behalf Of Ron Young >>> Sent: Saturday, October 08, 2011 2:02 PM >>> To: RE-wrenches >>> Subject: [RE-wrenches] intermittent battery problem >>> >>> 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 >> > > _______________________________________________ > 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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