We've installed quite a few GS Nanocarbon batteries and these are available
in 24V.  5000 cycles to 70% DOD (we usually shoot for around 50% DOD).
http://www.gsbattery.com/renewable/renewable-energy-slr-series/

No problems thus far.  Not cheap but very high quality.

On Fri, Sep 27, 2019 at 3:42 AM jay <[email protected]> wrote:

> You might also look at
>
> https://www.cdtechno.com/pdf/lit/12_1137.pdf
>
> Which is using nano carbon, for 3000 cycles to 50%.
>
> Other battery companies also have carbon/lead at up to 4000+ cycles for
> VRLA, and Rolls has 4500 cycles for flooded, both at 50% DOD.
>
> The UnigyII is tried and proven tech, but low cycle life compared to the
> newer carbon LA chemistries.
>
>
> jay
>
> Peltz Power
>
>
>
>
>
>
> On Sep 26, 2019, at 2:55 PM, Jerry Shafer <[email protected]>
> wrote:
>
> Howie
> Understand but the reality is that inverter is going to fail and then it
> may be to late to make an upgrade and it will be more costly. You might
> want to consider Deka Unigyll that can be bussed in 24 volts and changed to
> 48 volts later. No it's not LI but it's a good solution.
> Jerry
>
> On Thu, Sep 26, 2019, 2:18 PM Howie Michaelson <[email protected]>
> wrote:
>
>> I get what you are saying Jerry, but this client ( a retiring teacher in
>> a very rural, low wage school district, sadly) has lived very lightly
>> off-grid (1kW solar, 24v Rolls KS21s original batteries) for 18 years years
>> and has no pressing need to upgrade his VFX3524 inverter. I'd rather find a
>> good 24volt option to compare a straight KS21 replacement to.  I know the
>> inverter could crap out at any time, but if it ain't broke...
>> Howie
>>
>> On Thu, Sep 26, 2019 at 5:03 PM Jerry Shafer <[email protected]>
>> wrote:
>>
>>> Dollars and sence, drop the 24 volt, BPI is a great battery. Once l show
>>> my customers all the benefits of a 48 volt upgrade it wins every time. I am
>>> not talking about busses, RV's and one night stands l am talking about off
>>> grid homes.
>>>
>>> On Thu, Sep 26, 2019, 1:53 PM Howie Michaelson <
>>> [email protected]> wrote:
>>>
>>>> Hi all,
>>>> I've been using BlueIon batteries recently both on- and off-grid, and
>>>> really like them so far, although I have limited time on them so not a ton
>>>> of experience yet.  I am wondering what folks are liking for 24 v LiFePO4
>>>> battery options.  I have 24 volt off-grid clients who are not ready to swap
>>>> out to 48v, but might be interested in Lithium batteries. TIA,
>>>> Howie
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-- 



Mac Lewis

*"Yo solo sé que no sé nada." -Sócrates*
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