I noticed that my MPPTs were getting fairly warm this summer so I made some 10mm deep aluminium spacers to go between the MPPT and the mounting board. I was surprised at the effect it had on improving the convection cooling of the units.
I hope some people my find this little hack useful. 
Very good. Do you have any comparative figures?
I did have a stick on thermometer on the heatsink of the 100/50A MPPT and with a air temperature of 26 Celsius the heatsink thermometer was reading 37 Celsius, after I fitted the spacers the highest temperature I noticed was 31 Celsius with an air temperature of 25 Celsius.
I also connected an additional 2 x 120 watt PV panels to the MPPT after I fitted the spacers. So the MPPT was working harder after the spacers were fitted.
I would add that I don’t know how accurate the stick on thermometer is, but there has been a noticeable improvement in the heatsink temperature when PV panels are in full sun.
Sounds efficient. I will try it though I don’t have an issue. Electronics can’t be too cold in summer.
I couldn’t agree more, keeping electronic equipment as cool as possible in the summer is a good thing. It also helps improve the lifespan and reliability of the equipment.
Undoubtedly Victron have designed their range of MPPTs to run at fairly high temperatures, anything that helps improve heat dissipation is a good thing.
