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 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 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 manufacturers?
What are thoughts about LiFePO batteries vs the standard telcomm batteries?


--

Thanks,
 Mark                          mailto:m...@mailmt.com

Myakka Communications
www.Myakka.com


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