Hi Glenn This is a real problem, but so is all battery care. What I do is to turn off the battery system before, let it stand for one to 6 hours, then measure the resting voltage. I know this is hard to do, but using the curves and a very accurate meter it does sort of revel the state of charge. As the battery ages these numbers become less reliable.
On one occacion I took the battery and discharged it through my air cooled water heater elements which allowed me to make a voltage vs discharge curve, as the water heater elements allow control of current. I had to discharge over 10 hours and only discharged 30% of the capasity then measured the state of charge and recharged slowly. This is out of the picture for anyone with a life. Darryl --- On Tue, 12/16/08, Glenn Burt <[email protected]> wrote: > From: Glenn Burt <[email protected]> > Subject: [RE-wrenches] Sealed battery test/maintenance > To: "RE-wrenches" <[email protected]> > Date: Tuesday, December 16, 2008, 11:55 AM > Good Holiday Season to all: > > Does anyone have a sealed (gel & AGM) battery > test/maintenance procedure > they would feel comfortable sharing with the group? > I have been tasked with creating one for our company now > that we have more > than a couple of grid tied systems with battery backup. > > Hate to re-invent the wheel with so much talent available > here. > Thanks in advance! > > Regards, > > Glenn Burt > Technical Specialist > > Renewable Power Systems, LLC > PO Box 967 > Averill Park, NY 12018 > V: 518-674-5808 > C: 518-810-3174 > F: 518-514-1175 > E: [email protected] > www.RPSpower.com > > > > _______________________________________________ > 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
