Just the joy of handling lighter batts make lithium well worth it. Not to
mention all the other positive attributes.
From: castarritt
Sent: Thursday, January 4, 2024 9:27 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] -48v power plant
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.
Gino Villarini
Founder / President
@GVillarini
787.273.4143 |
Metro Office Park #18 Suite 304 Guaynabo, PR 00968
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
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
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
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
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
>> 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
>>
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