Does anyone know what the power output is for the 7-pin with the factory tow package? I just wanna make sure that my JLR with the tow package will properly charge the battery in the teardrop that I have on order.
We recently got a camper so I just went through this with our 2019 3.6. In practice, the power actually available through the 7-pin of the factory tow package is pretty feeble. The wire gauge used on the jeep side of the 7-pin connector isn't anywhere near enough to pull 30 amps through and maintain 12V, let alone a charging voltage. It's also hampered by the 'smart' alternator which isn't smart enough to know that a trailer is attached.
If you just need to trickle charge an already full battery then the 7-pin power is probably fine.
I ended up running 8 gauge from the aux 1 wire in the engine bay to an Anderson SB50 plug by the 7-pin, then running 8 gauge on the trailer side to the DC-DC charger. Even with most of the run being 8 gauge, the voltage at the trailer end can still be less than 12V when pulling 30+ amps. I might change to using one of the lower rated aux switches and use a relay instead since I'm really close to the 40 amp limit on aux 1.