[RE-wrenches] Absurd battery question

[Todd Cory]

Why not use flooded lead calcium batteries. They last 30 years and have 
basically no maintenance needs... And the equipment is designed for this 
type of battery architecture.

On December 22, 2025 20:50:22 Chris Daum via RE-wrenches 
<re-wrenches at lists.re-wrenches.org> wrote:
> RE:  Closed loop communications…  I have a customer who needs to replace 
> his old AGMs; he’s looking at getting something like 2500ah @ 24V and wants 
> LFPs.  This is a battery based, grid tie system.  His equipment is a pair 
> of XW4024s (Schneider – and he has NO interest in replacing his inverters) 
> and three Classic (Midnite) charge controllers.  I’m concerned with 
> integrating the LFPs with his old inverter, but his Classics, I believe, 
> can be reprogrammed to accommodate the LFPs.  This system was installed 
> around 2015 so the equipment is not new – but it’s basically been humming 
> along until a couple of weeks ago, when there was a week of 60 to 90 MPH 
> winds that killed the power for a while.  This is near Boulder, CO (at 9000 
> ft elevation).  His system worked fine til his old AGMs gave out.  Their 
> power was out for ~3 days, then came on for 2 days, then went out again for 
> a couple of days.  So he realized how undersized and old his batteries were.
>
> If he gets some new LFPs, do you think they’ll work with this vintage 
> equipment?  Any of your wonderful advice to pass along!?   I’m thinking the 
> Classics can dial in the settings he needs.
>
> Thanks, y’all!
>
> Chris Daum
> Oasis Montana Inc.
> 406-777-4309 or 4321
> 406-777-4309 fax
>
>
>
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