FWIW I avoided the "bleeding edge" battery technology and went with the tried and true batteries. They just sit there and work. I only typically need a couple of minutes of run time before the LP generator but I have 24 hours of run time (with all 7 shelves in another few years).
On Thu, Jan 4, 2024 at 10:38 AM Mark - Myakka Technologies <m...@mailmt.com> wrote: > I'm starting to get flashbacks for the last time I did this. It wasn't a > pleasant experience. Felt I was oversold un-needed over priced options. > Trying to be more careful this time. > > Looking at the LifePO4 stuff and finding a bunch of rack mount batteries, > but they all seem to be China made. Can anyone recommend a brand they are > using. Also, can't find any rack mount chargers to to charge these guys. > Has anyone here actually setup a LifePO4 plant. I may have to stay with > the Lead Acid stuff, rather not be doing a DIY system or be on the bleeding > edge. > > > -- > Best regards, > Mark mailto:m...@mailmt.com > > Myakka Communications > www.Myakka.com > > ------ > > Wednesday, January 3, 2024, 8:02:33 PM, you wrote: > > PKvA> Something to think about is that LiFePO4 is good to 100% DOD, > whereas we > PKvA> should all be keeping lead-acids above 50% DOD if we want lifespan.. > So > PKvA> 460Ah lifepo4 = 920Ah lead-acid in my mind.. > > PKvA> Peter Kranz > PKvA> www.UnwiredLtd.com > PKvA> Desk: 510-868-1614 x100 > PKvA> Mobile: 510-207-0000 > PKvA> pkr...@unwiredltd.com > > PKvA> -----Original Message----- > PKvA> From: AF <af-boun...@af.afmug.com> On Behalf Of Ken Hohhof > PKvA> Sent: Wednesday, January 03, 2024 4:57 PM > PKvA> To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> > PKvA> Subject: Re: [AFMUG] -48v power plant > > PKvA> Of course the algorithms will be showing us all ads for LiFePO4 > batts now. > PKvA> I got one the other day for this one: > PKvA> > https://www.epochbatteries.com/products/12v-460ah-lifepo4-battery-ip67-heate > PKvA> d-bluetooth-victron-comms > > PKvA> 12V 460Ah in an 8D size. What some people call a "truck battery". > That's a > PKvA> lot of Ah. We have some 10+ year old old 8D AGMs I think they are > rated 225 > PKvA> Ah. Heavy suckers. Just hauling them to the recycler at EOL is a > chore. > > > PKvA> -----Original Message----- > PKvA> From: AF <af-boun...@af.afmug.com> On Behalf Of Peter Kranz via AF > PKvA> Sent: Wednesday, January 3, 2024 5:31 PM > PKvA> To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> > PKvA> Cc: Peter Kranz <pkr...@unwiredltd.com> > PKvA> Subject: Re: [AFMUG] -48v power plant > > PKvA> Yes you poll each unit. Each battery in the string has a Battery ID > set by > PKvA> dip switches. If you have a compatible inverter/charger it polls each > PKvA> battery to pull data points of interest. Take a look at this > battery, it > PKvA> supports CANBUS, RS-485, and chaining batteries with battery ID's > set by dip > PKvA> switch. > > PKvA> https://signaturesolar.com/eg4-ll-s-48v-100ah-server-rack-battery/ > > PKvA> Peter Kranz > PKvA> www.UnwiredLtd.com > PKvA> Desk: 510-868-1614 x100 > PKvA> Mobile: 510-207-0000 > PKvA> pkr...@unwiredltd.com > > PKvA> -----Original Message----- > PKvA> From: AF <af-boun...@af.afmug.com> On Behalf Of Ken Hohhof > PKvA> Sent: Wednesday, January 03, 2024 2:57 PM > PKvA> To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> > PKvA> Subject: Re: [AFMUG] -48v power plant > > PKvA> It's kind of an awkward situation. Suppose you have 4 batteries > total, each > PKvA> with their own internal BMS. Do you want to monitor each battery? > Maybe. > PKvA> My first impression is no. But perhaps knowing that battery #3 has a > PKvA> problem would be a good thing, like your car telling you all the > tires are > PKvA> at 34 psi except front right is at 26 psi. Chuck's forklift > probably just > PKvA> has one battery (and no SNMP). > > PKvA> -----Original Message----- > PKvA> From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince > PKvA> Sent: Wednesday, January 3, 2024 4:42 PM > PKvA> To: af@af.afmug.com > PKvA> Subject: Re: [AFMUG] -48v power plant > > PKvA> Somebody could make a bluetooth to SNMP adapter/converter or > something. > PKvA> Nah, that would be too hard. > > > PKvA> bp > PKvA> <part15sbs{at}gmail{dot}com> > > PKvA> On 1/3/2024 2:37 PM, Peter Kranz via AF wrote: > >> There are rack mount LiFePO4 batteries with other options than > Bluetooth. > >> RS232, RS485, and HTTP/SNMP are available with LiFEPO4 batteries built > >> in BMS systems.. The HTTP/SNMP ones are the hardest to find, pretty > >> much all support RS232/CANBUS. Some inverter/rectifier shelf vendors > >> now support > >> RS485 monitoring of your battery strings natively. > >> > >> Peter Kranz > >> www.UnwiredLtd.com > >> Desk: 510-868-1614 x100 > >> Mobile: 510-207-0000 > >> pkr...@unwiredltd.com > >> > >> -----Original Message----- > >> From: AF <af-boun...@af.afmug.com> On Behalf Of Ken Hohhof > >> Sent: Wednesday, January 03, 2024 12:21 PM > >> To: af@af.afmug.com > >> Subject: Re: [AFMUG] -48v power plant > >> > >> Conservatism and institutional momentum, well said. Same here. > >> > >> One issue apparently is can't charge them below 0 degrees C. But I'm > >> seeing ads claiming internal heaters and temperature controls. Can't > >> speak from experience, I just put in a bunch more AGMs. > >> > >> I also see from specs a lot about Bluetooth. I'm used to lots of > >> controls and stats via web and SNMP from some of the high end charge > >> controllers like Alpha, Eltek, ICT. How do you access the battery > >> control module at a remote site if it's Bluetooth? Or is that just for > PKvA> initial commissioning? > >> > >> ---- Original Message ---- > >> From: dmmoff...@gmail.com > >> Sent: 1/3/2024 1:25:16 PM > >> To: "'AnimalFarm Microwave Users Group'" <af@af.afmug.com> > >> Subject: Re: [AFMUG] -48v power plant > >> > >> We're still building with VRLA batteries...but that's just the > >> combination of conservatism and institutional momentum. I'd look > PKvA> seriously at LiFePo4. > >> For compatibility with existing rectifiers you'd look for battery > >> packs with a charge controller and management built in. You can then > >> disable the temperature comp, equalization, or whatever other > >> smart/fancy stuff the rectifier would do and just let it serve as a > >> power supply and distribution device. > >> > >> There's a devil on my shoulder telling me that with Lithium drop in > >> replacements with integrated controllers I can eliminate the rectifier > >> and just get a beefy 48V power supply and a PDU. But there's that > >> institutional momentum thing again. > >> > >> -Adam > >> > >> > >> -----Original Message----- > >> From: AF <af-boun...@af.afmug.com> On Behalf Of Mark - Myakka > >> Technologies > >> Sent: Wednesday, January 03, 2024 1:45 PM > >> To: AnimalFarm Microwave Users Group <af@af.afmug.com> > >> Subject: [AFMUG] -48v power plant > >> > >> Happy New Year > >> > >> I need to build a new -48v power plant. Last one I did was about 7 > >> years ago. I know things have changed. Any recommendations on > PKvA> manufacturers? > >> What are thoughts about LiFePO batteries vs the standard telcomm > PKvA> batteries? > >> > >> > >> -- > >> > >> Thanks, > >> Mark mailto:m...@mailmt.com > >> > >> Myakka Communications > >> www.Myakka.com > >> > >> > >> -- > >> AF mailing list > >> AF@af.afmug.com > >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > >> > >> > > PKvA> -- > PKvA> AF mailing list > PKvA> AF@af.afmug.com > PKvA> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > PKvA> -- > PKvA> AF mailing list > PKvA> AF@af.afmug.com > PKvA> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > PKvA> -- > PKvA> AF mailing list > PKvA> AF@af.afmug.com > PKvA> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > PKvA> -- > PKvA> AF mailing list > PKvA> AF@af.afmug.com > PKvA> 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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