Any advice on how to install a battery isolator on a 2022 F150? Need to run a second isolated battery to power work equipment in the back but I can't figure out how to install the isolator as the factory cable coming off the alternator seems heavily integrated with other circuits in the positive battery cable. Appreciate any help.

 

This is what I installed in my 2014. Only difference is I upgraded the supply line to a 2/0 gauge to supply the second battery mounted under the bed. Works like a charm in my case.


AK4wheeler

 

Your choice
Use a relay on the charge line to the aux battery. Then the start battery will be isolated from the aux with the key off.
OR
Install a dc-dc charger between the start battery and the aux battery so the aux battery will get power from the start battery when the motor is on. Or just leave them connected when the key in on and have the aux batter charge slower.

 

Great question I don't have the answer to but to let it be known the Battery control on 2018 and later is quite complex.
The truck Battery has a Sensor on the neg lead post that reads many parameters it will not be able to do on a remote mounted battery.
The Alternator output is controlled by a Body Control Module according the these parameters and engine loads, measured.
The Current for both Charging the Battery and Discharge load use is measured as a voltage drop, by the Sensor across a >special< short cable to chassis ground. This signal is sent back to the BCM dictates how the Alternator is to function, when, how much and how long over control leads to the Alternator and the Diagnostic faults that may happen that is able to set at least three codes.
It will be interesting to see how this all works out because it's not like an old systems where Isolators were the norm and nothing but the Alternator regulator was in play.
Connecting into a complex system is tricky at best.
Good luck.