It 100% depends on the exact on board battery charger your trailer has.Tongue weight is 400lbs at the max for the Mav. I was also looking at the replacement of the trailer battery with a Lifepo for weight and more power. The trailer dealer said that the 7 pin connector wont trickle charge the Lifepo. Not sure if he is correct.
As of 2025 even cheap entry level $15,000 17 foot campers most often come with dual mode battery chargers for lead and LiFePo. Some may have a switch you set. Many are "Auto Sensing".
There's no reason your truck can't charge a LiFePo so long as you have a dual mode charger. The same applies to when you are on grid power.
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