Ok, I did a cursory check of the Ford set-up which is a clean sheet of paper design with many electrical safeguards integrated into the system from the get-go (to protect costly and essential computer, etc), and the F 150 is not a diesel which requires a whole lot of starting amps to get up and going (via the two batts).
Personally, I would avoid doing that especially since you could have an inverter-battery set-up in your camper that would accomplish nearly the exact same thing (less auto-engine starting)…It just makes waaaay more sense to me to go the segregated inverter and battery in the camper route, which is what I’ve done…
Though there are several different inverter types out there (e.g. modified-sine, pure-sine, pass-through types, pass-through with built in charger and ATS, LF, HF, et al…) so much depends on your likes and what you plan to use the inverter for…
Know too that not all inverters of the same ‘advertised rating’ see certain kinds of loads (i.e. reactive loads) in quite the same way, so avoid the bargain inverters with cr#ppy electronics…
Some other considerations might be (if you choose to??…) how you plan to integrate the inverter into your camper’s electrical system (or a stand-alone inverter?), if so, which appliances you’d want to run from the inverter, battery type and capacity…
I’d also be thinking heavily about a sizable solar set-up…JMO
Phil
