Hi Dan and Kienan I’m curious how much water you are adding monthly?
Jay Peltz Power. > On Nov 22, 2018, at 7:08 AM, Dan Fink <danbo...@gmail.com> wrote: > > Wrenches; I have run my house on 12 volt NiFe batteries for 3 years now. I > was going to write a long essay, but Kienen beat me to it. It's an excellent > analysis, I agree with each of his bullet points. > > All I'll add is that the batteries charge with decent efficiency up to 80% > SOC. To get that last 20%, they do require 1.65 volts per cell, which most > standalone inverter / chargers won't do off a generator - they freak out at a > bit above 15v and shut down. > > I've used 2 tactics to get that last 20% when using a generator, and I have > experienced the same issue that Kienen mentioned -- they need to get a nice > strong, charge cycle every so often or else they will behave like a heavily > sulfated FLA, but of course the NiFes don't sulfate. > > 1) after charging to 80% SOC with the generator, both of my charge > controllers (outback and midnite) have no problem being programmed to a 16.5v > absorb cycle, I set absorb at 6 hours, on a sunny day that does the trick > here. > > 2) If no long, sunny day available and you are forced to use a generator and > charger that won't let you get to 16.5v, remove one cell from the series > string, and charge the other 9 cells. Then put the one you removed back in > the string, and remove one of the ones you discharged, and generator charge > again. Then re-assemble back into a 10-cell string. I've only had to do this > a couple times. > > In general, I'm happy with these batteries, and happy to never have to deal > with sulfation again, and remember I have the worst case scenario here with a > 12v bank, undersized because of the greater DOD capability of NiFes, a > refrigerator that surges very hard, and a magnum inverter that goes wonky > with big surges at low voltages. > > I would sell Iron Edison NiFes to a client...but unless they are a special > sort of off-grid 12v person, I'd only do 48v because of the surge issue. > > > Dan Fink > Professor of Solar Energy Technology, Ecotech Institute > IREC Certified Instructor™ for: > ~ PV Installation Professional > ~ Small Wind Installer > Executive Director, Buckville Energy > NABCEP Registered Continuing Education Providers™ > NABCEP PV Associate > > 970.672.4342 > > > > >> On Wed, Nov 21, 2018 at 11:35 AM <d...@foxfire-energy.com> wrote: >> Hi Guys, I have a potential customer inquiring about installing a pre >> packaged Iron Edison system.. I recall hearing strange stories about Ni-Fe >> batteries but don't recall the specifics. I have done a few searches with >> mixed results.. And have friends advising I run like a Rabbit.. Thought I'd >> run it by you folks for an update.. >> Thanks, and Happy Turkey Day. >> >> db >> >> >> Dan Brown >> Foxfire Energy Corp. >> Renewable Energy Systems >> (802)-483-2564 >> www.Foxfire-Energy.com >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
_______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
