I can confirm at least one reverse marked battery as well; another reason I hammer everyone on my projects to confirm polarity with a multimeter, and mark the wires as John Wiles has advocated: Red = Positive, Black = negative for ungrounded systems Red = positive, white = negative for neg grounding and White = positive, black = negative, for positive grounded systems. I take it one step further, and put on the positive conductor white tape with red printing on positive that says " + Positive + ground+ " Only takes a minute, and makes sure nobody gets "turned around" with polarity checks on a hot roof. Wire coloring should match everyones' multimeter polarity, just another easy step to reduce dangerous mistakes.
R. Walters [email protected] Solar Engineer On Oct 19, 2010, at 4:58 PM, Mark Dickson wrote: > Happened to us once too with a Surette S-530. Now that “free” battery sits > in my home’s bank with some sharpie + and - symbols on it. Easy to see how > the symmetrical cap could be placed on backwards. Seems a keyed notch on the > cap would prevent that. . . > > Best regards, > > Mark Dickson, > NABCEP Certified Solar PV Installer ™ > Oasis Montana Inc. > > From: [email protected] > [mailto:[email protected]] On Behalf Of Jason > Szumlanski > Sent: Tuesday, October 19, 2010 4:26 PM > To: RE-wrenches > Subject: Re: [RE-wrenches] Battery polarity check > > Wow. I always check my batteries for voltage when they arrive before > installation. I never thought to check the polarity. I'll look for that > negative symbol on my meter from now on! > > Jason Szumlanski > Fafco Solar > > On Oct 19, 2010, at 6:22 PM, "Kirpal Khalsa" <[email protected]> wrote: > >> Hey All......just wanted to send out a reminder to not take the markings on >> the terminals of batteries for granted.....we were installing a brand new >> bank of 2V 2400Ah batteries today and had one battery mis labeled direct >> from the manufacturer......had the potential to be catastrophic, just so >> happened that luck was on our side.......I will not be relying on the >> manufacturer's polarity markings any more....... >> >> >> -- >> Sunny Regards, >> Kirpal Khalsa >> NABCEP Certified Solar PV Installer >> Renewable Energy Systems >> www.oregonsolarworks.com >> 541-218-0201 m >> 541-592-3958 o >> _______________________________________________ >> 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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