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 <[email protected]
<mailto:[email protected]>> 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: [email protected] <mailto:[email protected]>
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 <[email protected]
<mailto:[email protected]>> On Behalf Of [email protected]
<mailto:[email protected]>
> Sent: Wednesday, February 12, 2020 5:36 PM
> To: [email protected] <mailto:[email protected]>
> 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: [email protected] <mailto:[email protected]>
> 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, [email protected] <mailto:[email protected]>
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:* [email protected] <mailto:[email protected]>
>> *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
>> [email protected] <mailto:[email protected]>
>>
>>
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