boB Time for you to design an RTS that also measures SG.
Then my Classic can: Set Return Amps automatically. Alert for an excursion in charge time Alert for low water Etc. Thank you, Maverick Maverick Brown BSEET, NABCEP Certified Solar PV Installer ® President & CEO Maverick Solar Enterprises, Inc. Office: 512-919-4493 Cell: 512-460-9825 Sent from an iPhone. On Jul 21, 2010, at 9:56 PM, boB Gudgel <b...@midnitesolar.com> wrote: > Darryl Thayer wrote: >> That is a good question, I have not an answer, but of course it should be >> based on the amp hour of the battery bank, absorb charging voltage, and of >> course the charging source in the case of generators. Following Ron's >> advise start at C/5 for SOC less than 50% then C/10 till about 70% SOC and >> then C/15 till 80% then C/20 to 90 %. the problem we have no way to set >> these values, Perhaps Ron could give is a routine? The closet to SOC >> charging is the Outback and then the Magnum but both miss the goal. > > I would also be interested to hear Ron's answer to this, but I would think > that if you measure the current and Specific Gravity > together, during absorption , when the proper fully charged SG specification > is reached, you would have your RA answer. > > Or, darn near close to it. > > boB > > > > > > > > >> >> --- On *Wed, 7/21/10, Dana /<d...@solarwork.com>/* wrote: >> >> >> From: Dana <d...@solarwork.com> >> Subject: [RE-wrenches] RETURN AMP SETTING >> To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> >> Date: Wednesday, July 21, 2010, 5:54 PM >> >> As the % of full charge is related to the of degree absorption & >> gravity [the denser & more charged acid descending, and lighter >> acid rising] @ what point in the absorption would be prudent to >> stop charging? >> >> >> I used to cut off the charge on the Trace SW series at 12 “return >> amps”, VS. the factory default I think was at 5 amps. This has & >> continues to work well but I never had anyone really answer this >> function clearly. >> >> >> Is there a battery manufacturer or wrench that would care to >> comment on the: >> The minimum “Return” amps to disconnect for a “full” charge? >> >> OR >> >> The time required per 100 AHR after reaching the Absorption point >> setting for the mix to occur? >> >> >> I realize that battery construction, battery condition, age and >> temperature and the current power usage will also play into this >> factor and it may not be a simple answer. >> >> >> >> >> >> >> Dana Orzel >> >> >> Great Solar Works, Inc >> >> E - d...@solarwork.com >> >> V - 970.626.5253 >> >> F - 970.626.4140 >> >> C - 970.209.4076 >> >> web - www.solarwork.com >> >> Responsible Technologies for Responsible People since 1988" >> >> >> *From:* re-wrenches-boun...@lists.re-wrenches.org >> [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of >> *Mark Frye >> *Sent:* Wednesday, July 21, 2010 4:25 PM >> *To:* al...@positiveenergysolar.com; 'RE-wrenches' >> *Subject:* Re: [RE-wrenches] Propane Generator, Dual Outback Inverters >> >> >> Allen, >> >> >> Can I infer that if you are shutting off the gen before charge >> rates drop in absorption that you are running only briefly in the >> absorb phase? Or do your charge currents remain high through out >> an extended absortion phase? >> >> >> Perhaps you have plenty of PV which you rely upon to bring the >> batteries up through the absorption phase, once the gen is shut off. >> >> >> I would be interest to learn more about your approach to this. >> >> >> Thanks, >> >> Mark Frye >> Berkeley Solar Electric Systems >> 303 Redbud Way >> Nevada City, CA 95959 >> (530) 401-8024 >> www.berkeleysolar.com <http://www.berkeleysolar.com/> >> >> >> ------------------------------------------------------------------------ >> >> *From:* re-wrenches-boun...@lists.re-wrenches.org >> [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of >> *Allan Sindelar >> *Sent:* Wednesday, July 21, 2010 3:17 PM >> *To:* re-wrenches@lists.re-wrenches.org >> *Subject:* Re: [RE-wrenches] Propane Generator, Dual Outback Inverters >> >> The Onan RS20000 shown in the generators article in HP 131 page 98 >> has performed flawlessly as backup support to an Outback >> quad-stack of VFX3648s. Differences, however, are that this 20kW >> gennie charges four inverters, rather than two; the elevation is >> 6,600 feet for about a 20% output deration; there are no huge >> loads above charging draw; and the client is aware enough to shut >> it off before absorption reduces the charge rate - all different >> conditions than you have described, as the gennie is usually fully >> loaded and running in balance. >> >> Darryl is right about the amount of words necessary. >> >> *Allan** Sindelar* >> _alla...@positiveenergysolar.com_ >> </mc/compose?to=al...@positiveenergysolar.com> >> NABCEP Certified Photovoltaic Installer >> EE98J Journeyman Electrician >> *Positive Energy, Inc.* >> 3201 Calle Marie >> Santa Fe, New Mexico 87507 >> *505 424-1112* >> _www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 9.0.851 / Virus Database: 271.1.1/3008 - Release Date: >> 07/21/10 00:36:00 >> >> >> -----Inline Attachment Follows----- >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> </mc/compose?to=re-wrenc...@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 >> >> > > _______________________________________________ > 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
