I wonder why they want to know my gender? Sent from my iPhone
> On Feb 13, 2020, at 3:22 AM, TJ Trout <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[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 >>>> >>> >>> -- >>> AF mailing list >>> [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 >> -- >> AF mailing list >> [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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