[onegreenev]

The radiator should be fine as the coolant won't likely get near as hot as it would in an automobile and not boil out. It just pulls some heat away from the controller so it can't over heat. Do you have a picture of the transmission cooler you purchased? Something like this would more than likely be more than enough for cooling the controller.

 

[remy_martian]

Sounds good, though you can get inverter radiators for fairly cheap on eBay.

Air gap at top of reservoir is ok. In fact, you probably need it for expansion.

You'll need to vacuum fill the system - it's air in the inverter that'll kill it.

Put a thermal switch on the outlet stream of the inverter and light an idiot light if it goes over a certain temperature (I don't have it handy). Temp gauge better.

Use Nissan's coolant recommendation.

 

[Tristan]

Thanks guys I appreciate it.
Got stuff mocked up and plumbing it right now. Here’s pic of reservoir and cooler.

 

[remy_martian]

Eyeball engineering - you might need a second cooler/fan, which is another good reason to monitor the inverter's outlet temperature.