[RE-wrenches] battery questions.

Mon Feb 3 16:32:03 PST 2025

Jay, great questions.
One of the few good things about the OutBack Skybox (I think it was that
one) was the lifting holes on the upper back corners so that a bar or pipe
could be run through making it much easier for a lift into place. Maybe for
the 300 lb batteries lifting eyes on all four top corners so that 2 bars
across the front and back could be used by 4 people to lift would be good.
Of course a mechanical lift will also do the job. I've always thought that
a battery that sits on the floor would be preferable unless subject to
flooding.
I've used different cable sizes and lengths to the extreme on my own
system, and there is a slight difference in charge between batteries but it
never gets too far out of balance. I do have one battery that gets slightly
more cycling, but that is actually what I prefer in this instance.
Remember the Aquion battery with the #12 cables and Amphenol PV connectors?

Brad

On Mon, Feb 3, 2025 at 2:34 PM jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi All
>
> Im wondering about a few things as we are talking batteries.
>
> 1. how do people feel about the amphenol battery connector vs lugs? A lot
> of batteries are going that way.  Lots to like about them.
>
> 2. battery cable lengths.  I see both things said, that they have to be
> the same length or doesn’t matter.
> I did a large fortress system that they wouldn’t warranty unless equal
> lengths.  Mind you, it would have added about 200’ of 4/0.  I convinced
> them by using different wire sizes to make the % VD the same and they
> agreed.
>
> 3. battery lifting attachment points.  300# is really heavy and is it
> actually more than 2 people can do via OSHA?
> What about some threaded holes for lifting rings, or places for straps on
> the side?
>
> Thanks
>
> jay
>
>
>
> On Feb 3, 2025, at 10:27 AM, Maverick Brown via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Bill
>
> So far I have installed eight of the midnight power flow 16 batteries.
>
> The most recent was three on an Outback Radian.
>
> I documented that process here, even with settings.
>
> [image: maxresdefault.jpg]
>
> Outback Radian GS8048A upgraded to MidNite Powerflo16 48kWh!
> <https://youtu.be/AwoaTZtHMjU?feature=shared>
> youtu.be <https://youtu.be/AwoaTZtHMjU?feature=shared>
> <https://youtu.be/AwoaTZtHMjU?feature=shared>
>
>
>  I also connected the Powerflo16 to XW system and the Polyon Tech
> compatibility shows the details of the BMS nicely.
>
> Documented here.
>
> [image: maxresdefault.jpg]
>
> Connecting the MidNite Powerflo16 to Schneider XW Series Inverters
> <https://youtu.be/bfWgmGNrIuE?feature=shared>
> youtu.be <https://youtu.be/bfWgmGNrIuE?feature=shared>
> <https://youtu.be/bfWgmGNrIuE?feature=shared>
>
>
> I have also made a chart of LiFePO4 settings and would like some feedback,
> if possible. I basically treat all 16s LiFePO4 batteries the same, Absorb
> at 3.45 per cell and everything trickles down from their.
>
> [image: Battery SOC State of Charge Map 2025-01-22.pdf]
>
> Thank you,
>
> Maverick
>
> Maverick Brown
> Off-Grid Solar Commander since 2006
> Maverick Solar Enterprises, Inc.
>  • Solar Commander Remote Power
>  • SunFlow Systems Cathodic Protection
> maverick at mavericksolar.com
> 512-460-9825
>
>
>
> On Feb 2, 2025, at 10:52 PM, Bill Battagin via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Have any off-gridders done a system with Powerflo16's to power pre-LFP
> OB/FX inverters?  The FM80's LFP settings in this system are compatible
> with LFP but I'm looking for options other than using the Aux in the CC's
> wired to a NC relay and from there to the inverter on/off landings in the
> green terminal of the OB/FX for the LBCO and reconnect function.
>
>             I've been down this road before, though a different
> equipment.  I've used the Aux from a Classic for inverter LBCO and
> reconnect though its never been fully "tested", although I read "open" and
> closed" at the un-wired aux landing when I forced it with a high LBCO
> setting.  Just thinking about the highest reliability.
>
>         Thanks in advance.
>
> Bill
>
> Feather River Solar Electric
> Bill Battagin, owner
> 4291 Nelson St. (Shipping)
> 5575 Genesee Rd. (USPS, UPS)
> Taylorsville, CA  95983
> 530-284-7849, 258-1641(cell)
> CA. C10 Lic # 874049
> Solar Powered since 1982
> Home of the Sunny Side Up
>
>
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> <Battery SOC State of Charge Map 2025-01-22.pdf><maxresdefault.jpg>
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