After modding the cooling arrangement on my off grid inverter, I wanted to check that the new fan was doing its job. The inverter case is kept warm, not hot, when my air conditioner is on. This is a good sign.
The thermal image shows hot spots where the power semiconductors are located.
The seek thermal xr camera was used for this inspection.
Step 1: The Fan.
The DC brushless fan draws air through the inverter and then exhausts it. The hot spot temperature is 97C which is pretty high but I have a ready supply of spares when it fails.