[RE-wrenches] Adding battery to grid tie

[david quattro]

True.  if you want to do grid, gen, and AC Couple then you need a transfer
switch or contactor.
       Likewise I haven’t touched a Powerwall, nor an Enphase battery.



On Sat, Aug 9, 2025 at 9:36 AM jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> One big issue with the AIO’s is that you can’t do grid, generator and ac
> coupling to the best of my understanding
>
> I do like the idea of just removing the old GT inverter and stuffing that
> into the AIO, elegant
>
> yes its my understanding that Tesla won’t accept generator.  While many
> are pissed off at eg4, I won’t touch tesla.
>
> and FYI you can buy the same inverter at Fortress.
>
> thanks everyone.
>
> jay
>
>
>
> On Aug 9, 2025, at 10:28 AM, Tyrone Houck via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Midnite AIO and Sol-Ark both work great for AC coupling in my experience.
> If anyone is new to "All In One" inverters I recommend having tech support
> walk you through commissioning, check firmware, etc. the first time.
>
>
>
>
> On Sat, Aug 9, 2025, 8:47 AM William Miller via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Two options:
>>
>> 1. AC couple existing inverter to a battery capable inverter.
>>
>> 2. Replace existing inverter.
>>
>> I favor option 2.
>>
>> Option 1 is only preferred if gaining access to the existing inverter for
>> replacement is difficult. An example would be a micro-inverter system.
>>
>> New AIO inverters allow true high voltage PV input so the existing
>> stringing will probably not need to be modified.
>>
>> I’m new to this so type of upgrade so I welcome any corrections to these
>> opinions.  I did replace a Sunny Boy in my shop with a Soul Ark and it’s
>> working great!
>>
>> William Miller
>> Miller Solar.com
>> 805-438-5600
>> www.millersolar.com
>>
>>
>> On Sat, Aug 9, 2025 at 8:26 AM Jay via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> Is there a consensus as to what equipment to use for adding battery
>>> backup to normal GT inverter?
>>>
>>>
>>>
>>> I’ve had a few people ask and I actually haven’t done it.
>>>
>>> Thx
>>> Jay
>>>
>>>
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