Inverter Mounting Near Battery Box?

SpencerRB wrote:
Appreciate the opinions, on both sides.

To clarify, the inverter I plan is use is the new MSH3012M. 3k watts, 12v.

Additionally, the proposed location would be above the battery/generator box (unable to see in picture). I have not measured the compartment temperature while the gen is running but it would be a good exercise. The gen box is fully sealed from the rest of the compartment, and I could easily add some insulation if the heat transfer is too much (if it doesn't overheat the inside of the gen box).

Regarding ventilation, there are a couple 3" drain holes on the floor of the compartment. I could easily punch an exhaust hole in the side with a cpu fan if needed.

"The MSH-M series combines both the energy from the AC input and the batteries to power the inverter loads. Often referred to as a boost system. This feature gives the inverter the ability to recharge the battery bank when there is surplus power, or to deliver more power to the loads if they require more than the AC input can supply."
Having said that, It is possible for both the generator and the inverter to run at the same time. Thats when the ventilation system will be the most critical in your installation.
The generator vents out the bottom of the compartment, along with the exhaust. If the intake vent for the inverter is picking up these hot fumes and feeding them into the inverter, at the very least it will shut down the inverter on over temp, or possibly the gas fumes will destroy the circuitry.
The MSH-M series inverters have two internal fans capable of 100 CFM.
The statement made by an uninformed poster about the generator and inverter never running at the same time is not correct, it is designed to do just that when the load demand requires it or battery charging is taking place, and does so automatically.
Hopefully you have downloaded the installation and owners manual and will study it carefully.