FaadielH

Hi I had my system installed at the end of March 2025. Recently I came across a few posts with regards to the heat that the solar charge controllers were generating. My charge controllers were hot to the touch during the day and I decided to go down the rabbit hole of figuring out what temp's the controllers were hitting and how to reduce them. Got myself a Temperature Sensor Gun and measured my controllers at 50.5 degrees Celsius before implementing my solution to cooling them down. Parts :- 4-6 x 120mm CPU fan ( Deep Cool in my case ) 1 x 90W 12V/7.5A Adaptor ( Model Q-A265 ) 1 x 1 to 2 DC Split Cable ( used by CCTV ) 2 x 1 to 5 DC Split Cable ( had those lying around ) 4-6 x DC Female Power Connector ( CCTV ADPT MJ077 ) The heat sink of the controller is against the wall, I didn't want to interfere too much with the installation setup ( I removed the conduit cover for the middle fan to push air through ). I left the conduit cover of the second controller on to see if there was a difference and you hardly see any difference in temperature. ( second controller at the far end in the pic ). These are the measurements for today :- At 07:30 the system was running at 3.8kWh solar production Controller 1 ( 3 fans ) - 31 degrees ( Fans off ) Controller 2 ( 2 fans ) - 32.5 degrees I purposefully left the fans off so that the controller can start heating up At 09:08 the system was running at 6.8kWh solar production Controller 1 - 50 degrees Controller 2 - 50.5 degrees Fans were switched on at this stage At 09:22 the system was running at 7.3kWh solar production Controller 1 - 43 degrees Controller 2 - 43 degrees At 10:17 The temperature of both controllers have been hovering between 41 and 42 degrees with the fans on. Example of how the fan is connected I hope that this implementation will extend the life of the controllers!!!! Have a great day all.