The Phoenix IP43 smart charger says this about mounting
5.1. Mounting
The Smart IP43 Charger … c. Install the charger on a non-flammable substrate and ensure there are no heat-sensitive items in the immediate vicinity; it is normal for the charger to become hot during operation.
I connected this charger and it worked flawlessly just by following instructions. It does get hot, my thermo laser device says 135 F and my finger test indicates that is probably correct when I touched it.
My entire Victron system is mounted on plywood which is flammable. The unit has good space for airflow and is not close to other components. What is needed? Something between the IP43 mounting bracket and the plywood? I suppose many solar charge controllers are constructed the same way - namely the mounting bracket is a heatsink with notches for screws. Unless you are building on bricks or cinder blocks, almost everything is flammable.
I would appreciate some suggestions