I use a 24v to 12v converter that is powering a temp sensor with a relay on it that will turn on a 12v 120mm computer fan when the controller gets over 30C (I can set it what i want). I got the fan angled so it hits the back heatsink when it runs (which is rare) in sure it will run more as i add panels. I also made a custom lenght eithernet cable that extends the USB adapter to about 40 feet to my server.
![20191028_223107[1].jpg 20191028_223107[1].jpg](https://diysolarforum.com/data/attachments/1/1501-2a80dbd7b1968e28eea17bdad8931936.jpg)
![20191028_223107[1].jpg 20191028_223107[1].jpg](https://diysolarforum.com/data/attachments/1/1501-2a80dbd7b1968e28eea17bdad8931936.jpg)