It’s got generator input terminals. 
Why not use them for the generator?

> On Jul 3, 2025, at 5:05 AM, Jason Szumlanski via RE-wrenches 
> <[email protected]> wrote:
> 
> 
> The attached wiring diagram from the manual shows both a generator and grid 
> connected to the Sol-Ark Grid input with a transfer switch to select between 
> grid and generator. 
> 
> Question: If you program the inverter for GEN on Grid Input and allow Grid 
> Sell, how would the inverter know what the input source is and prevent 
> selling to the generator inadvertently?
> 
> I suppose if it is an automatic transfer switch and the two wire start is 
> called for, the inverter might stop grid selling when calling for the 
> generator (but I'm not sure if that's the case). In any case, that's not a 
> failsafe solution because the generator could be started and selected 
> manually with the transfer switch and the inverter would not know it.
> 
> I have someone insisting that Sol-Ark supports this configuration with Grid 
> Sell enabled. I can't imagine that is the case. At a minimum, it would be bad 
> practice. 
> 
> In my opinion, the interface should disallow Grid Sell altogether when GEN on 
> Grid Input is selected. Maybe it's already doing that internally, but it 
> isn't clear at all from the interface or the manual. 
> 
> Of course, the Off-Grid section of the manual does tell you to not use the 
> Grid Sell option.
> 
> 
> Jason Szumlanski 
> Florida Solar Design Group 
> 
> 
> <Screenshot_20250703_063315_Drive.jpg>
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