[RE-wrenches] Midnite AIO Battery Low/Lost Behavior

Tue Jul 15 16:44:09 PDT 2025

These are useful suggestions for how to deal with low battery conditions,
however I understand Jason's situation to be a hardware or firmware issue -
the inverter temporarily reads battery voltage or SOC as 0% and shuts off,
needing manual intervention to turn back on.  I'm not sure if i am having
the same issue on at least a couple of sites with an AIO and 1 or 2 PF16s
in closed loop, by I've seen the inverters without warning seemingly loose
the batteries (which are in a relatively high SOC  - 70-80%), see no SOC,
then shut itself off.  So far the client has gotten the inverter back to on
by shutting it down entirely and restarting it.  It fires back up and
operates fine as though nothing has happened.  Anyone else experiencing
that?
Howie
Sun Catcher

On Tue, Jul 15, 2025, 6:43 PM William Miller via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Friends:
>
> Could one set the inverter LBCO slightly above the battery LBCO?  The
> inverter is controlling the shut down and the battery does not go into
> alarm.
>
>
> William Miller
> Miller Solar.com
> 805-438-5600
> www.millersolar.com
>
>
> On Tue, Jul 15, 2025 at 2:26 PM Jay via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> I can’t agree more that auto restart is a requirement.
>> A well designed system that has the inverter shut off( shut down or not
>> sure what the correct term is) due to low battery should restart in the
>> morning.
>>
>> Now I could easily see that it will have to get to some X amount of SOC
>> or volts or watts of input before it connects the AC loads.
>>
>> Jay
>>
>>
>>
>> On Jul 15, 2025, at 3:21 PM, Chris Schaefer via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>> 
>> Mr. Bryce,
>>
>> As offgrid is our biggest piece of the pie, I too would like to have the
>> AIO power back up when voltage is at an acceptable level just as our OB's,
>> Magnum's and Xantrex's have been for years. My hope is that in the very
>> near future a firmware upgrade would make this a selectable feature.
>>
>> Much appreciated,
>> Christopher
>>
>> On Tue, Jul 15, 2025 at 4:35 PM William Bryce via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> Is this closed loop or open loop?  If closed loop the "rules" require
>>> the machine to stay shutdown until the "issue" is identified.
>>>
>>> On Tue, Jul 15, 2025 at 8:04 AM Tyrone Houck via RE-wrenches <
>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>>> That's my understanding as well. Sure would be cool if there was an
>>>> automatic reconnect mode that could be set.
>>>>
>>>>
>>>>
>>>>
>>>> On Tue, Jul 15, 2025, 7:56 AM Jason Szumlanski via RE-wrenches <
>>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>>
>>>>> With this new breed of AIO inverters, when the battery reaches low
>>>>> voltage disconnect, do they all need manual intervention to restart
>>>>> inverting?
>>>>>
>>>>> I'm having an issue with a Midnite AIO with a stack of Pytes batteries
>>>>> that reset themselves for a yet undiagnosed reason. The DC Battery voltage
>>>>> goes to zero on the inverter for a moment, and then returns. The problem
>>>>> is, it requires manual intervention to push the button to turn the inverter
>>>>> back on. It does not happen automatically. That's not good for an unmanned
>>>>> remote site.
>>>>>
>>>>> Jason Szumlanski
>>>>> Florida Solar Design Group
>>>>>
>>>>>
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>>
>> --
>>
>> Chris Schaefer’s
>>
>>
>> *Tel 585-229-2083 or Cell 585-748-1870 *
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>>
>>
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