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:[email protected] 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> [email protected] PKvA> -----Original Message----- PKvA> From: AF <[email protected]> On Behalf Of Ken Hohhof PKvA> Sent: Wednesday, January 03, 2024 4:57 PM PKvA> To: 'AnimalFarm Microwave Users Group' <[email protected]> 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 <[email protected]> On Behalf Of Peter Kranz via AF PKvA> Sent: Wednesday, January 3, 2024 5:31 PM PKvA> To: 'AnimalFarm Microwave Users Group' <[email protected]> PKvA> Cc: Peter Kranz <[email protected]> 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> [email protected] PKvA> -----Original Message----- PKvA> From: AF <[email protected]> On Behalf Of Ken Hohhof PKvA> Sent: Wednesday, January 03, 2024 2:57 PM PKvA> To: 'AnimalFarm Microwave Users Group' <[email protected]> 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 <[email protected]> On Behalf Of Bill Prince PKvA> Sent: Wednesday, January 3, 2024 4:42 PM PKvA> To: [email protected] 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 >> [email protected] >> >> -----Original Message----- >> From: AF <[email protected]> On Behalf Of Ken Hohhof >> Sent: Wednesday, January 03, 2024 12:21 PM >> To: [email protected] >> 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: [email protected] >> Sent: 1/3/2024 1:25:16 PM >> To: "'AnimalFarm Microwave Users Group'" <[email protected]> >> 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 <[email protected]> On Behalf Of Mark - Myakka >> Technologies >> Sent: Wednesday, January 03, 2024 1:45 PM >> To: AnimalFarm Microwave Users Group <[email protected]> >> 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:[email protected] >> >> Myakka Communications >> www.Myakka.com >> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> PKvA> -- PKvA> AF mailing list PKvA> [email protected] PKvA> http://af.afmug.com/mailman/listinfo/af_af.afmug.com PKvA> -- PKvA> AF mailing list PKvA> [email protected] PKvA> http://af.afmug.com/mailman/listinfo/af_af.afmug.com PKvA> -- PKvA> AF mailing list PKvA> [email protected] PKvA> http://af.afmug.com/mailman/listinfo/af_af.afmug.com PKvA> -- PKvA> AF mailing list PKvA> [email protected] PKvA> 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
