tytower wrote:Will it work?
Export limiting is done by the grid tied inverter measuring the current going to the grid, and adjusting it's power output so the export limit is not exceeded. With grid tied inverters, export limiting relies on a connection to the grid to be in place so the inverter can monitor the flow of current, even if the export limit is set to zero.
Typically, when PV grid tied inverters see the AC frequency rise above a specified frequency they see this as an error condition and are designed to shut down. But, some grid tied inverters are designed to ramp down their output as the AC frequency rises.
When a grid tied inverter is pushing energy that has nowhere to go, the output voltage of the inverter will rise.
If you have a battery connected off grid inverter that senses voltage rise on it's output and increases it's frequency with that voltage rise, it will control the output of a grid tied inverter that ramps down it's output with frequency rise. The off grid battery inverter has to have AC output characteristics that will operate the grid tied inverter, and not all of them do.
I would recommend you don't play around with incompatible hardware thinking you can make it work.