I am currently working on a new construction project where we will be interconnecting a solar system with a 480/277 1200 A service. We're planning to do a backfed breaker. According to 230.95 services over 150 V to ground and rated 1000 A or more have to have GFP on the main service and therefore our solar also has to have GFP per 705.32.

The electrician on the project is telling me they are not installing GFP with the main service breaker because it isn't required for 480/277 services rated 1200 A or less. Am I missing an exception somewhere? I'm hesitant to call the electrician out on this but also want to make sure the customer is getting a code compliant installation. The AHJ enforces 2017 NEC.