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> On Behalf Of ch...@wbmfg.com Sent: Wednesday, February 12, 2020 5:36 PM To: 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 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 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 > *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/> > Desk: 510-868-1614 x100 > Mobile: 510-207-0000 > pkr...@unwiredltd.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