The lvx6048 should be arriving late July, and looks to be exactly what you are looking for, and can even do grid tie, with a 450v pv input!
https://watts247.com/product/lvx-6048-hybrid-solar-inverter-split-phase-120v-240v/
I bought a used 6500ex, I got the wifi to connect to my router, but can't use the app as the previous owner has the wifi module linked to his account. Is there a way for him to deactivate his account, so I can activate the unit with an account for myself?
When wiring up, you could use any color wire you wish. Try to avoid using the same color for all the wires, as it can make it harder should you ever have to troubleshoot issues with the trailer lights in the future