USA - DC Ground fault breaker (Permit -Roof mounted Solar)

Hello all - my 1st post here.

I’m looking to see if anyone has overcome the issue of installing a DC Ground fault protector for there unit to comply with NEC2017 and pass electrical inspection in the USA (I’m in Florida). I’m struggling to find a working solution that’s suitable for the portable generator market. I have an AC200 & AC300 unit that I’m installing, but when looking at a conventional DC ground fault breaker it needs one side to the battery negative which we can’t access on the bluetti products.

Are there any other solutions or products on the market that will accomplish this, or has anyone already been though this pain point and have a solution - any help appreciated !

This is my setup: