I've also thought about trying just some basic Meanwell
AC/DC supplies with LFP packs instead of a fancy ICT or
other charger. As long as I am using a power supply that
will sag voltage instead of trip offline when max current is
reached, the max current doesn't exceed the LFP pack's rated
charge current, and I can set the supply's voltage to the
appropriate value, I don't see why I need anything more.
The LFP pack's BMS already has LVD, and we aren't using
fancy multi stage charge profiles with boost voltage on
lithium packs. Am I missing something here? So far,
bossman has preferred just playing it safe and paying for
the ICT shelves we know work, so I haven't got to try it yet.
On Thu, Jan 4, 2024 at 10:17 AM castarritt
<castarr...@gmail.com> wrote:
We also use ICT and have been running them with both ISP
Supplies and Power Storage Solutions LFP packs without
any problems. The only downside is that the ICT shelf
can't read the state of charge or give your an estimated
runtime remaining with lithium batteries. I understand
they won't have a super accurate reading on those
parameters without communicating with the BMS, but I
wish they could at least calculate AH in and out vs set
AH capacity to give a rough estimate.
On Thu, Jan 4, 2024 at 9:49 AM Gino A. Villarini
<g...@aeronetpr.com> wrote:
We are having great success with signature solar
units and ICT rectifiers.
<https://aeronetpr.com> *Gino Villarini*
Founder / President
@GVillarini
787.273.4143 |
<https://www.inc.com/profile/aeronet>
<https://www.facebook.com/aeronetpr>
<https://www.instagram.com/aeronetpr/>
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AeroNet-dula-network-access.jpg
<https://store.homefi.pr/>
*From: *AF <af-boun...@af.afmug.com> on behalf of
Mark - Myakka Technologies <m...@mailmt.com>
*Date: *Thursday, January 4, 2024 at 11:38 AM
*To: *AnimalFarm Microwave Users Group <af@af.afmug.com>
*Subject: *Re: [AFMUG] -48v power plant
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 <mailto:m...@mailmt.com>
Myakka Communications
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------
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>
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.unwiredltd.com%2F&data=05%7C02%7Cgav%40aeronetpr.com%7C3433113bdfe540761c1b08dc0d3b2785%7C786321c8ea74460e81c62d3479dd1728%7C0%7C0%7C638399794931390821%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=t9Hy5%2BztcKAjRibHx1pcXUM8vciPDMeGmf5JRA2%2BN3U%3D&reserved=0
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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://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.epochbatteries.com%2Fproducts%2F12v-460ah-lifepo4-battery-ip67-heate&data=05%7C02%7Cgav%40aeronetpr.com%7C3433113bdfe540761c1b08dc0d3b2785%7C786321c8ea74460e81c62d3479dd1728%7C0%7C0%7C638399794931390821%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=PKVNWn62PB%2Fp2ghr%2FCJDFp%2B9lKmlqyHk19SiqbLWBNI%3D&reserved=0
<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://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsignaturesolar.com%2Feg4-ll-s-48v-100ah-server-rack-battery%2F&data=05%7C02%7Cgav%40aeronetpr.com%7C3433113bdfe540761c1b08dc0d3b2785%7C786321c8ea74460e81c62d3479dd1728%7C0%7C0%7C638399794931390821%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=BksZawSZCzqdhwhfGqQ3uUWLAHjXnFuDunkKZDVu8dY%3D&reserved=0
<https://signaturesolar.com/eg4-ll-s-48v-100ah-server-rack-battery/>
PKvA> Peter Kranz
PKvA>
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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
>>
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.unwiredltd.com%2F&data=05%7C02%7Cgav%40aeronetpr.com%7C3433113bdfe540761c1b08dc0d3b2785%7C786321c8ea74460e81c62d3479dd1728%7C0%7C0%7C638399794931547004%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=M7gx5YcVZFjwYmViVPgp3eab%2BrffEAxBLfeg4QwNL14%3D&reserved=0
<http://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 <mailto:m...@mailmt.com>
>>
>> Myakka Communications
>>
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