That's a great point, and I do believe even the GT inverter I mentioned follows UL-1741 as the video for it shows the slow ramp up of power to the grid (following the UL-1741 spec). BUT.... I also think it goes by sequence of how you power everything on. For instance:
Portable power station...
I was wondering about that. But there are grid-tie inverters that only supply power needed by the load. As an example:
https://www.amazon.com/gp/product/B07L5R4486/ref=ewc_pr_img_7?smid=A2L4N2PKBD1J75&th=1
In this situation, I could see the power station start supplying the current. The GT...
Current limit (10A) will be the same at whatever voltage you put in. If you upscale the voltage from your battery to 48V, you will get a much faster charge time. Limit is 500W input, so 48V is a good voltage to upscale it to. In exchange for speed, you will lose some efficiency, but not much...
Lets say you hook a 700W solar grid tie inverter into a powerstrip and then plug it into the AC output of a 600 W portable power station (Such as a BlueETTI EB3A). The 700W solar grid tie inverter has island protection, but detects the AC voltage of the 600 W portable power station...