some guy named ron is coming over to charge my batteries now On Thu, Feb 13, 2020 at 10:20 AM Brian Webster <i...@wirelessmapping.com> wrote:
> To make sure you get the proper connectors, why else? > > > > Thank you, > > Brian Webster > > www.wirelessmapping.com > > > > *From:* AF [mailto:af-boun...@af.afmug.com] *On Behalf Of *Chuck McCown > *Sent:* Thursday, February 13, 2020 10:42 AM > *To:* AnimalFarm Microwave Users Group > *Subject:* Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? > > > > I wonder why they want to know my gender? > > Sent from my iPhone > > > > On Feb 13, 2020, at 3:22 AM, TJ Trout <t...@voltbb.com> wrote: > > > > Battery hookup.com has the modules, don't buy them all guys. They say > Daly BMS works good. Make sure you get a bms with low temp and low voltage > disconnect. > > > > On Wed, Feb 12, 2020, 6:26 PM <ch...@wbmfg.com> wrote: > > Do tell. Where do you get the batts? What BMS are you using? > > Do you want to resell? I would volunteer to be logistics and fulfillment > if you want. > > > > *From:* TJ Trout > > *Sent:* Wednesday, February 12, 2020 7:19 PM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? > > > > Guys, every chemistry of lithium battery (lifepo4, li-ion, lto, etc) are > available in 1 to 10 KW modules at less than $100 a kilowatt hour most of > them test between 70 to 99% of the rated capacity mostly removed from > electric vehicles anyways we repurpose them into storage for our equipment > you just need a 48 volt BMS to balance the cells and provide low > temperature and low voltage protection. > > > > On Wed, Feb 12, 2020, 5:50 PM Robert <i...@avantwireless.com> wrote: > > They have three problems.. 1) Cost.. Yeah they break the bank. 2) low > voltage compared to other chemistries, which means _more_ cost 3) poor > efficiency.. You put in 100 watts, you only get 80 watts out. All of > this is from listening to Will Prowse.. He has an excellent set of tubes > on them... > > https://www.youtube.com/channel/UCoj6RxIAQq8kmJme-5dnN0Q > > On 2/12/20 5:33 PM, Steve Jones wrote: > > 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 <i...@avantwireless.com> > 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 <ch...@wbmfg.com > > <mailto:ch...@wbmfg.com>> 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: af@af.afmug.com <mailto:af@af.afmug.com> > > 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 <af-boun...@af.afmug.com > > <mailto:af-boun...@af.afmug.com>> On Behalf Of ch...@wbmfg.com > > <mailto:ch...@wbmfg.com> > > > Sent: Wednesday, February 12, 2020 5:36 PM > > > To: af@af.afmug.com <mailto:af@af.afmug.com> > > > 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: af@af.afmug.com <mailto:af@af.afmug.com> > > > 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, ch...@wbmfg.com <mailto:ch...@wbmfg.com> > > 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:* af@af.afmug.com <mailto:af@af.afmug.com> > > >> *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 > > >> pkr...@unwiredltd.com <mailto:pkr...@unwiredltd.com> > > >> > > >> > > > ---------------------------------------------------------------------- > > >> -- > > >> -- > > >> AF mailing list > > >> AF@af.afmug.com <mailto:AF@af.afmug.com> > > >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > >> > > >> > > > -- > > > AF mailing list > > > AF@af.afmug.com <mailto:AF@af.afmug.com> > > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > > > > > -- > > AF mailing list > > AF@af.afmug.com <mailto:AF@af.afmug.com> > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > -- > > AF mailing list > > AF@af.afmug.com <mailto:AF@af.afmug.com> > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > ------------------------------ > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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