Although I'm not clear on this, my impression is that when flooded batteries float for long periods of time, the electrolyte stratifies and creates various aging problems, which is why I assume one would want to cycle the batteries at least somewhat on a somewhat regular basis...
Howie -- Howie Michaelson NABCEP Certified Solar PV Installer Catamount Solar, LLC Renewable Energy Systems Sales and Service VT Solar Electric & Hot Water Incentive Partner http://www.CatamountSolar.com 802-272-0004 On Fri, July 13, 2012 12:19 pm, toddc...@finestplanet.com wrote: > "The more savvy customers I will recommend they turn off > the PV's when they are there to get a deep discharge in." > > um, why use up battery cycles unnecessarily like this? > > todd > > > > > > > > On Friday, July 13, 2012 7:28am, "Jason Lerner" <wapa...@rockisland.com> > said: > >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> 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 >> >> Hello John, >> >> This time of year I service off grid summer cabins where people come up >> once a >> year for a few weeks. The batteries in these systems generally do not >> die from >> over cycling, but from over/under watering, acid stratification, >> corrosion, and >> generally being ignored. The more savvy customers I will recommend they >> turn off >> the PV's when they are there to get a deep discharge in. >> >> Could you recommend any thing else they could do to lengthen their >> battery bank >> lifespan? These systems generally have a small PV charging capability, >> and float >> charge 350 days a year. It seems ironic that these systems that really >> never get >> used, and my battery bank at home that gets used (but not abused) and >> cycled >> daily, will last the same number of years. >> >> Thanks very much, >> >> Jason Lerner >> >> Waldron Power and Light Co. >> >> On Jul 9, 2012, at 12:53 PM, John DeBoever wrote: >> >>> Jason, Wrenches, >>> >>> Thank you for your patience and positive statements on Trojan Battery >>> Company. >>> Last week was a busy and I was away from my desk most of the time with >>> limited >>> access to Internet. >>> >>> Both the Premium âREâ versions L16RE-A and L16RE-B, and, the >>> Signature L16P & L16H are great deep-cycles lead acid batteries for >>> solar >>> applications. The key differences between them are: >>> >>> ü The grid is thicker for the Premium âREâ L16RE-A and L16RE-B, >>> which effectively reinforces further the frame strength which results >>> into a >>> greater corrosion resistance; >>> ü There is relatively more electrolyte in contact with the plates in >>> the >>> Premium âREâ L16RE-A and L16REB, which enhances the electrochemical >>> reaction, particularly during PSOC; >>> ü The rubber-based multi-rib geometry separator is approx. 30% >>> thicker for >>> the Premium âREâ L16RE-A and L16RE-B, which translates into a >>> longer >>> life of the separator. The thicker multi-ribs geometry keeps over time >>> the acid >>> channels open longer, promoting the flow of the electrolyte . As a >>> result, the >>> thicker separator is reducing the risk of stratification and enhancing >>> electrochemical processing throughout the plates, resulting into longer >>> continuous performance of the battery. >>> ü In the approx. same form factor (except the height), this results >>> into >>> more lead per Ah capacity on the L16-RE units nameplate. >>> >>> As a consequence, the cycling performances of the Premium âREâ is >>> 1,600 cycles @ 50% DOD and 4,000 cycles @ 20% DOD. Respectively 1,200 >>> cycles # >>> 50% DOD, and, 3,000 cycles @ 20% DOD @ 20% DOD, for the L16-P & L16-H. >>> >>> I hope this helps. Let me know if I can shed further light on other >>> attributes of >>> lead acid batteries. >>> >>> Sunniest regards, >>> >>> John >>> >>> John F. DeBoever >>> Global Technical & Projects Director â Renewable Energy >>> Trojan Battery Company >>> >>> 12380 Clark Street >>> Santa Fe Springs, CA 90670 >>> Tel: +1-562-236-3000 Ext. 3139 >>> Cell: +1-845-514-7600 â NY office time zone: USA EST (GMT-5) >>> Skype: john.f.deboever >>> Fax: +1-562-236-3239 >>> jdeboe...@trojanbattery.com >>> www.trojanbattery.com >>> >>> >>> From: re-wrenches-boun...@lists.re-wrenches.org >>> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason >>> Lerner >>> Sent: Sunday, July 01, 2012 11:26 PM >>> To: RE-wrenches >>> Subject: Re: [RE-wrenches] Battery Experience >>> >>> I am back to using Trojan's after 12 years of trying others, none seem >>> to last >>> as long for the L16's. Could anybody explain the technical differences >>> between >>> the Trojan L16 and the L16RE-B's. I have read all the brochures but >>> would like >>> to understand what is going on in there instead of getting the >>> marketing of >>> DuraGridâ¢, MaxGuard® XL separator and Alpha Plus. >>> >>> Thanks very much, >>> >>> Jason Lerner >>> >>> Waldron Power and Light and Co. >>> On Jun 29, 2012, at 6:41 PM, Jonathan Hill wrote: >>> >>> >>> Over 20 years experience with them says you can't go wring with Trojan! >>> Jonathan Hill, senior system engineer and founder >>> >>> Sierra Solar Systems >>> 563C Idaho Maryland Road >>> Grass Valley, CA 95945 >>> Celebrating our 32nd 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:solar...@sierrasolar.com> >>> world wide web: <http://www.sierrasolar.com> >>> >>> Check out our 2 minute video at: >>> http://www.youtube.com/watch?v=WY-0UuabPEk >>> >>> >>> >>> On Jun 29, 2012, at 12:42 PM, Dave Palumbo wrote: >>> >>> >>> We have had less than stellar performance out of the Crown L-16âs >>> that we >>> installed 4 to 5 years ago. Premature failure is my experience. About >>> 60% of the >>> cycle life compared to Trojan L-16âs and also Surrette/Rolls. Iâve >>> been using those since 1985. >>> >>> Back to using Trojan. Specifically RE-Bâs either L-16, or T-105. And >>> have >>> used Trojan Industrial IND 13-6V on one system with good success with >>> another set >>> ordered. >>> >>> Dave >>> >>> From: re-wrenches-boun...@lists.re-wrenches.org >>> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of >>> SunHarvest >>> Sent: Friday, June 29, 2012 11:56 AM >>> To: RE-wrenches >>> Subject: Re: [RE-wrenches] Battery Experience >>> >>> Just got talked into buying Crown (395Ah@20Hr) as my local rep, "the >>> battery >>> expert", was persuasive in his testimony to their reliability. >>> Should've >>> consulted wrenches first. >>> >>> Should I be worried?? >>> >>> Eric Stikes >>> SunHarvest Solar >>> +1 (530) 798 - 3738 >>> www.harvesthesun.com >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> 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: RE-wrenches@lists.re-wrenches.org >>> >>> 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 >>> >>> >>> >>> This e-mail message and any attachments that accompany it may contain >>> information >>> that is confidential, privileged, or protected from disclosure. It is >>> intended >>> solely for the use of the individual(s) to whom it was intended to be >>> addressed. >>> If you have received this e-mail by mistake, or you are not the >>> intended >>> recipient, any reading, disclosure, copying or other use of this >>> communication is >>> strictly prohibited. If you have received this communication in error, >>> please >>> immediately advise the sender at their phone number listed above, or by >>> electronic mail, and also permanently delete the original and all >>> copies of this >>> e-mail and any attachments from all locations. Thank you. >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> 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 >>> >> >> > > > > Sent from Finest Planet WebMail. > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > 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: RE-wrenches@lists.re-wrenches.org 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
