[twoodfin]

Isn’t the right place to fix this at the junction between the plants and the grid? Regulate the grid utilities into a gateway role, and require all inverter control & telemetry traffic to pass through them.

This seems likely to be more fruitful than attempting to regulate 400 Chinese panel manufacturers.

What am I missing?

[itishappy]

You're thinking about this right, just at a utility scale.

The "plants" in this context are homes and businesses. The junction points between plants and grid are the inverters sold by the panel manufacturers.