Chuck, if you are after high kw/h and don't mind low density, the Leaf packs are really awesome, the modules are basically made to be modularly packed, you can use all-thread. Several off the shelf PCB's available to make them into 8s, 16s packs with all of the cell voltages already pinned out, basically a diy kit is available to make them into packs and they are sub $100/kwh
On Thu, Feb 13, 2020 at 1:05 PM TJ Trout <t...@voltbb.com> wrote: > all of the batteries batteryhookup.com and bigbattery.com are _used_ or > new old stock, nothing new. > > On Thu, Feb 13, 2020 at 1:02 PM TJ Trout <t...@voltbb.com> wrote: > >> you get what you pay for, all of these guys guarantee the models to >> discharge to the specs they provide or money back >> >> On Thu, Feb 13, 2020 at 11:17 AM Robert <i...@avantwireless.com> wrote: >> >>> You should be aware, that bigbattery.com is selling _used_ batteries. >>> For example the 24v "powerwall" 3KWh unit for $699 is a used unit per Will >>> Prowse. His testing showed 67% degradation from new. What the cycle life >>> of a 67% depleted battery array is unknown.. >>> >>> On 2/13/20 10:54 AM, ch...@wbmfg.com wrote: >>> >>> Hoboy does she have some nice batteries... >>> >>> *From:* Brian Webster >>> *Sent:* Thursday, February 13, 2020 11:49 AM >>> *To:* 'AnimalFarm Microwave Users Group' >>> *Subject:* Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? >>> >>> >>> Same here…… >>> >>> >>> >>> Thank you, >>> >>> Brian Webster >>> >>> www.wirelessmapping.com >>> >>> >>> >>> *From:* AF [mailto:af-boun...@af.afmug.com <af-boun...@af.afmug.com>] *On >>> Behalf Of *Mathew Howard >>> *Sent:* Thursday, February 13, 2020 12:41 PM >>> *To:* AnimalFarm Microwave Users Group >>> *Subject:* Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs? >>> >>> >>> >>> I'm afraid to click on that link... >>> >>> >>> >>> On Thu, Feb 13, 2020 at 10:50 AM TJ Trout <t...@voltbb.com> wrote: >>> >>> Also bigbattery.com is another good source >>> >>> >>> >>> On Thu, Feb 13, 2020, 8:46 AM Steve Jones <thatoneguyst...@gmail.com> >>> wrote: >>> >>> 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 >>> >>> -- >>> 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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