these they say are good for subzero charging, thats what appeals to me and that the subzero doesnt affect discharge rate
On Wed, Feb 12, 2020 at 6:39 PM Robert Andrews <[email protected]> wrote: > Lithiums degrade with temps over 130 degrees F ( depending upon > chemistry and if you attempt to charge them below freezing. Failure can > result from trying to charge below freezing. Between those extremes > they do pretty well. The below freezing is a deal breaker for outside > solar. There are manufacturers ( BattleBorn + others ) that are coming > out with heaters to get around that. > > On 02/12/2020 04:21 PM, Mathew Howard wrote: > > I'm wondering how well lithiums hold up compared to flooded cells in a > > non-environmentally controlled area. I suspect it's worse. > > > > On Wed, Feb 12, 2020 at 6:20 PM <[email protected] > > <mailto:[email protected]>> wrote: > > > > In my 42+ years of dealing with stationary flooded cells is that you > > can > > easily get 20+ years from them if they are properly maintained and > > kept in > > an environmentally controlled area. > > > > -----Original Message----- > > From: Bill Prince > > Sent: Wednesday, February 12, 2020 5:04 PM > > To: [email protected] <mailto:[email protected]> > > Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? > > > > I think you would expect at least 2-3 times the life with lithium > > (almost all the various chemistries currently in vogue). You can also > > increase discharge tolerance to 80-90 percent instead of the usual > > lead-acid 50% (or thereabouts). > > > > I think the cost is still a bit over the top. Maybe another year or > two > > depending. > > > > > > bp > > <part15sbs{at}gmail{dot}com> > > > > On 2/12/2020 3:47 PM, Ken Hohhof wrote: > > > Life also matters. > > > > > > Half the cost but has to be replaced in half the time would not > > be a good > > > deal. With my luck, if batteries die after 3 years, I'll have a > > big power > > > outage every 37 months. And it's not just a cost calculation. > > Lugging > > > half > > > a ton of new batteries out to a tower and then hauling the old > > ones back > > > for > > > recycling sucks. So if someone has battery technology that lasts > > 10 or 20 > > > years, that's worth a bunch. > > > > > > -----Original Message----- > > > From: AF <[email protected] > > <mailto:[email protected]>> On Behalf Of [email protected] > > <mailto:[email protected]> > > > Sent: Wednesday, February 12, 2020 5:36 PM > > > To: [email protected] <mailto:[email protected]> > > > Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? > > > > > > Charging time doesn't interest me much in a grid backup > > situation. The > > > cost > > > of the battery per watt hour is normally my only consideration > for a > > > backup > > > battery. > > > > > > -----Original Message----- > > > From: Robert Andrews > > > Sent: Wednesday, February 12, 2020 4:25 PM > > > To: [email protected] <mailto:[email protected]> > > > Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? > > > > > > Nice thing about the lithium Iron is any charger that is > programmable > > > will work. And the faster you can charge them the better. You > > think > > > flooded times of 2-4 hours and with a big charger the lithium > > banks can > > > charge at 100amps and 1 hour. > > > > > > On 02/12/2020 02:06 PM, [email protected] <mailto:[email protected]> > > wrote: > > >> 21 cents per watt hour. That is not competitive with flooded > cells. > > >> And what kind of special charger would you have to have? > > >> *From:* Peter Kranz via AF > > >> *Sent:* Tuesday, February 11, 2020 5:36 PM > > >> *To:* [email protected] <mailto:[email protected]> > > >> *Cc:* Peter Kranz > > >> *Subject:* [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? > > >> > > >> Anyone successfully built a telecom UPS solution using rack mount > > >> LiFePO4 batteries sourced from china? > > >> > > >> There seems to be endless arrays of rack mount solutions there: > > >> > > >> > > > https://www.alibaba.com/product-detail/48v-100ah-200ah-lithium-ion-bat > > >> > tery_60844575234.html?spm=a2700.details.pronpeci14.6.7e40675elEWkcL > > >> > > >> Prices run about 25% the cost of locally sourced LiFePO4 > solutions. > > >> The selection is crazy however, and who knows what the gotchas > are. > > >> > > >> *Peter Kranz > > >> *www.UnwiredLtd.com <http://www.UnwiredLtd.com> > > <http://www.unwiredltd.com/> > > >> Desk: 510-868-1614 x100 > > >> Mobile: 510-207-0000 > > >> [email protected] <mailto:[email protected]> > > >> > > >> > > > ---------------------------------------------------------------------- > > >> -- > > >> -- > > >> AF mailing list > > >> [email protected] <mailto:[email protected]> > > >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > >> > > >> > > > -- > > > AF mailing list > > > [email protected] <mailto:[email protected]> > > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > > > > > -- > > AF mailing list > > [email protected] <mailto:[email protected]> > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > -- > > AF mailing list > > [email protected] <mailto:[email protected]> > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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