Sometimes for free. Telcos routinely replace batts that are perfectly fine and
need a place for the old ones.
From: Mathew Howard
Sent: Friday, February 14, 2020 11:41 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs?
Right, I suspect one can get pre-owned lead-acid quite a bit cheaper.
On Fri, Feb 14, 2020 at 12:40 PM Adam Moffett <dmmoff...@gmail.com> wrote:
We're also comparing new lead-acid to pre-owned li-ion.
On 2/14/2020 1:32 PM, ch...@wbmfg.com wrote:
I repost the list.
You can get a front post telecom batt for 16 cents per watt hour. But
yeah, 20 cents is more like it.
If solar flooded cells are OK, those can be had in the 7 cent range.
From: TJ Trout
Sent: Friday, February 14, 2020 11:20 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery packs?
I don't know what you guys are smoking :) but SLA/VRLA batteries are $200+
kh/w unless we are talking walmart boat batteries which are ~$100kw/h, I just
posted two sites with li-ion batteries with many options for 70-100$ per kw/h ??
On Fri, Feb 14, 2020 at 8:46 AM Robert <i...@avantwireless.com> wrote:
I think you nailed it. And until commercial Li batteries reduce price
by 1/2 or more they aren't competitive except in special use cases. (RV and
such)... with 1/2 price drop and 2x the performance it's effectively a 4x
difference in requirements and then they equal the utility of wet deep cycle.
They really need to be less than 1/2 the price to be a no-brainer...
On 2/14/20 8:03 AM, Mathew Howard wrote:
As I see it, for backup or solar applications, all that really matters
is $/kWH, lifespan, and temperature tolerance (and that generally doesn't even
matter if they're not outside). Are there any realistic advantages from
lithiums other than size/weight? That's obviously important for a cell phone or
an electric car, but it's pretty much irrelevant for what we're talking about
doing.
On Fri, Feb 14, 2020 at 9:18 AM Chuck McCown <ch...@wbmfg.com> wrote:
I only care about $/kWH
Sent from my iPhone
On Feb 13, 2020, at 5:05 PM, TJ Trout <t...@voltbb.com> wrote:
Chuck, if you are after high kw/h and don't mind low density, the
Leaf packs are really awesome, the modules are basically made to be modularly
packed, you can use all-thread. Several off the shelf PCB's available to make
them into 8s, 16s packs with all of the cell voltages already pinned out,
basically a diy kit is available to make them into packs and they are sub
$100/kwh
On Thu, Feb 13, 2020 at 1:05 PM TJ Trout <t...@voltbb.com> wrote:
all of the batteries batteryhookup.com and bigbattery.com are
_used_ or new old stock, nothing new.
On Thu, Feb 13, 2020 at 1:02 PM TJ Trout <t...@voltbb.com> wrote:
you get what you pay for, all of these guys guarantee the
models to discharge to the specs they provide or money back
On Thu, Feb 13, 2020 at 11:17 AM Robert
<i...@avantwireless.com> wrote:
You should be aware, that bigbattery.com is selling _used_
batteries. For example the 24v "powerwall" 3KWh unit for $699 is a used unit
per Will Prowse. His testing showed 67% degradation from new. What the cycle
life of a 67% depleted battery array is unknown..
On 2/13/20 10:54 AM, ch...@wbmfg.com wrote:
Hoboy does she have some nice batteries...
From: Brian Webster
Sent: Thursday, February 13, 2020 11:49 AM
To: 'AnimalFarm Microwave Users Group'
Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery
packs?
Same here……
Thank you,
Brian Webster
www.wirelessmapping.com
From: AF [mailto:af-boun...@af.afmug.com] On Behalf Of
Mathew Howard
Sent: Thursday, February 13, 2020 12:41 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah battery
packs?
I'm afraid to click on that link...
On Thu, Feb 13, 2020 at 10:50 AM TJ Trout <t...@voltbb.com>
wrote:
Also bigbattery.com is another good source
On Thu, Feb 13, 2020, 8:46 AM Steve Jones
<thatoneguyst...@gmail.com> wrote:
some guy named ron is coming over to charge my
batteries now
On Thu, Feb 13, 2020 at 10:20 AM Brian Webster
<i...@wirelessmapping.com> wrote:
To make sure you get the proper connectors, why else?
Thank you,
Brian Webster
www.wirelessmapping.com
From: AF [mailto:af-boun...@af.afmug.com] On Behalf
Of Chuck McCown
Sent: Thursday, February 13, 2020 10:42 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah
battery packs?
I wonder why they want to know my gender?
Sent from my iPhone
On Feb 13, 2020, at 3:22 AM, TJ Trout
<t...@voltbb.com> wrote:
Battery hookup.com has the modules, don't buy them
all guys. They say Daly BMS works good. Make sure you get a bms with low temp
and low voltage disconnect.
On Wed, Feb 12, 2020, 6:26 PM <ch...@wbmfg.com>
wrote:
Do tell. Where do you get the batts? What BMS
are you using?
Do you want to resell? I would volunteer to be
logistics and fulfillment if you want.
From: TJ Trout
Sent: Wednesday, February 12, 2020 7:19 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Alibaba LiFePO4 48V 200Ah
battery packs?
Guys, every chemistry of lithium battery
(lifepo4, li-ion, lto, etc) are available in 1 to 10 KW modules at less than
$100 a kilowatt hour most of them test between 70 to 99% of the rated capacity
mostly removed from electric vehicles anyways we repurpose them into storage
for our equipment you just need a 48 volt BMS to balance the cells and provide
low temperature and low voltage protection.
On Wed, Feb 12, 2020, 5:50 PM Robert
<i...@avantwireless.com> wrote:
They have three problems.. 1) Cost.. Yeah
they break the bank. 2) low voltage compared to other chemistries, which means
_more_ cost 3) poor efficiency.. You put in 100 watts, you only get 80 watts
out. All of this is from listening to Will Prowse.. He has an excellent set
of tubes on them...
https://www.youtube.com/channel/UCoj6RxIAQq8kmJme-5dnN0Q
On 2/12/20 5:33 PM, Steve Jones wrote:
these they say are good for subzero charging,
thats what appeals to me and that the subzero doesnt affect discharge rate
On Wed, Feb 12, 2020 at 6:39 PM Robert Andrews
<i...@avantwireless.com> wrote:
Lithiums degrade with temps over 130 degrees F
( depending upon
chemistry and if you attempt to charge them
below freezing. Failure can
result from trying to charge below freezing.
Between those extremes
they do pretty well. The below freezing is a
deal breaker for outside
solar. There are manufacturers ( BattleBorn +
others ) that are coming
out with heaters to get around that.
On 02/12/2020 04:21 PM, Mathew Howard wrote:
> I'm wondering how well lithiums hold up
compared to flooded cells in a
> non-environmentally controlled area. I
suspect it's worse.
>
> On Wed, Feb 12, 2020 at 6:20 PM
<ch...@wbmfg.com
> <mailto:ch...@wbmfg.com>> wrote:
>
> In my 42+ years of dealing with
stationary flooded cells is that you
> can
> easily get 20+ years from them if they
are properly maintained and
> kept in
> an environmentally controlled area.
>
> -----Original Message-----
> From: Bill Prince
> Sent: Wednesday, February 12, 2020 5:04 PM
> To: af@af.afmug.com
<mailto:af@af.afmug.com>
> Subject: Re: [AFMUG] Alibaba LiFePO4 48V
200Ah battery packs?
>
> I think you would expect at least 2-3
times the life with lithium
> (almost all the various chemistries
currently in vogue). You can also
> increase discharge tolerance to 80-90
percent instead of the usual
> lead-acid 50% (or thereabouts).
>
> I think the cost is still a bit over the
top. Maybe another year or two
> depending.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 2/12/2020 3:47 PM, Ken Hohhof wrote:
> > Life also matters.
> >
> > Half the cost but has to be replaced
in half the time would not
> be a good
> > deal. With my luck, if batteries die
after 3 years, I'll have a
> big power
> > outage every 37 months. And it's not
just a cost calculation.
> Lugging
> > half
> > a ton of new batteries out to a tower
and then hauling the old
> ones back
> > for
> > recycling sucks. So if someone has
battery technology that lasts
> 10 or 20
> > years, that's worth a bunch.
> >
> > -----Original Message-----
> > From: AF <af-boun...@af.afmug.com
> <mailto:af-boun...@af.afmug.com>> On
Behalf Of ch...@wbmfg.com
> <mailto:ch...@wbmfg.com>
> > Sent: Wednesday, February 12, 2020
5:36 PM
> > To: af@af.afmug.com
<mailto:af@af.afmug.com>
> > Subject: Re: [AFMUG] Alibaba LiFePO4
48V 200Ah battery packs?
> >
> > Charging time doesn't interest me much
in a grid backup
> situation. The
> > cost
> > of the battery per watt hour is
normally my only consideration for a
> > backup
> > battery.
> >
> > -----Original Message-----
> > From: Robert Andrews
> > Sent: Wednesday, February 12, 2020
4:25 PM
> > To: af@af.afmug.com
<mailto:af@af.afmug.com>
> > Subject: Re: [AFMUG] Alibaba LiFePO4
48V 200Ah battery packs?
> >
> > Nice thing about the lithium Iron is
any charger that is programmable
> > will work. And the faster you can
charge them the better. You
> think
> > flooded times of 2-4 hours and with a
big charger the lithium
> banks can
> > charge at 100amps and 1 hour.
> >
> > On 02/12/2020 02:06 PM,
ch...@wbmfg.com <mailto:ch...@wbmfg.com>
> wrote:
> >> 21 cents per watt hour. That is not
competitive with flooded cells.
> >> And what kind of special charger
would you have to have?
> >> *From:* Peter Kranz via AF
> >> *Sent:* Tuesday, February 11, 2020
5:36 PM
> >> *To:* af@af.afmug.com
<mailto:af@af.afmug.com>
> >> *Cc:* Peter Kranz
> >> *Subject:* [AFMUG] Alibaba LiFePO4
48V 200Ah battery packs?
> >>
> >> Anyone successfully built a telecom
UPS solution using rack mount
> >> LiFePO4 batteries sourced from china?
> >>
> >> There seems to be endless arrays of
rack mount solutions there:
> >>
> >>
>
https://www.alibaba.com/product-detail/48v-100ah-200ah-lithium-ion-bat
> >>
tery_60844575234.html?spm=a2700.details.pronpeci14.6.7e40675elEWkcL
> >>
> >> Prices run about 25% the cost of
locally sourced LiFePO4 solutions.
> >> The selection is crazy however, and
who knows what the gotchas are.
> >>
> >> *Peter Kranz
> >> *www.UnwiredLtd.com
<http://www.UnwiredLtd.com>
> <http://www.unwiredltd.com/>
> >> Desk: 510-868-1614 x100
> >> Mobile: 510-207-0000
> >> pkr...@unwiredltd.com
<mailto:pkr...@unwiredltd.com>
> >>
> >>
>
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