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@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@lists.re-wrenches.org 
> <mailto:re-wrenches@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 <http://www.millersolar.com/>
>> 
>> 
>> On Sat, Aug 9, 2025 at 8:26 AM Jay via RE-wrenches 
>> <re-wrenches@lists.re-wrenches.org 
>> <mailto:re-wrenches@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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