I am using the Power hat to operate a Pi 2 in my travel trailer. The Pi 2 is being used because it can operate closer to 60C compared to my Pi3 and Pi4. I am still sorting out ventilation and cooling so hopefully this numbers will come down.
Note the CPU temperature in the picture. The ambient is approximately 10C lower.
I had to remove the unit from the trailer for maintenance and pressing the clips on J4 caused J4 to disintegrate. The clips did not break off when I first installed it so I assume that the clips broke due to extended (1 week) operation at high temperatures (30-60C) as I live in Arizona and this gets full sun on the outside of the trailer.
I have ordered replacement connectors (SparkFun poke home) but I am likely to solder in a pigtail with a 2.1mm barrel receptacle to simplify connection to my power system.
Comments are welcome along with ideas to reduce the temperature in my trailer while keeping it sealed to the elements while in storage.