My A/C unit is also installed in that compartment and the charger was hidden by some of the ducting.
Unit failed so we replaced with a very similar (but slightly higher capacity) unit but installed new unit in compartment under port settee...very close to batteries. Had to install new (and bigger due to larger capacity) wires so was easier to install in new location rather than try to run wires back to original location.
Before we went with the the bigger unit we considered moving new unit (same capacity) to the back side of the access door in the rear berth compartment. Wires were right there, it would have fit just fine and would have much easier access to it (no A/C ducting in the way).
Very happy with the new set up.
Cheers,
Jim