My sunsynk inverter is super quiet by default as it is the 5.5 model with no external fans.
These inverters come with massive heat-sinks which is supposed to keep their temperatures within spec and eliminate the need for fans.

But, they still get too hot for my liking The cooler you can keep power electronics the longer they should last

I have added a set of 2X 12 volt high flow rate fans that are controlled by an esp8266 and node red with mqtt.
Currently have just connected the one fan to see if I programmed it correctly and how well it works with keeping the temps down.

So far I am quite impressed the temps are now way down from the past 30 days average and the fan is just idling along at under 2000 rpm's
Will see if I can add the second fan next week and then the temps should stay this low no matter how hard the inverter works.

Yip, Fan-less electronics in South Africa is not clever. A friend with a Deye 5.5 kW fan-less unit made a frame for 3x 80mm 12V fans, and lets them run 24/7. He says the "Fan-less" unit now runs cooler than his old unit with built in fan. 😀

I think many more people will follow your example.

45 minutes ago, TimCam said:

Yip, Fan-less electronics in South Africa is not clever. A friend with a Deye 5.5 kW fan-less unit made a frame for 3x 80mm 12V fans, and lets them run 24/7. He says the "Fan-less" unit now runs cooler than his old unit with built in fan. 😀

I think many more people will follow your example.

Example of a heat sink that does not use a fan. Fins are 50mm deep. 

 

Edited March 18, 20231 yr by Scorp007

When running electronics in the +70 deg temp range with high ambient air temp the life expectancy will be negatively impacted. Anything to bring temperatures down will help with extending the units serviceable life span. 👍

On 2023/03/18 at 6:45 PM, WannabeSolarSparky said:

My sunsynk inverter is super quiet by default as it is the 5.5 model with no external fans.
These inverters come with massive heat-sinks which is supposed to keep their temperatures within spec and eliminate the need for fans.

But, they still get too hot for my liking The cooler you can keep power electronics the longer they should last

I have added a set of 2X 12 volt high flow rate fans that are controlled by an esp8266 and node red with mqtt.
Currently have just connected the one fan to see if I programmed it correctly and how well it works with keeping the temps down.

So far I am quite impressed the temps are now way down from the past 30 days average and the fan is just idling along at under 2000 rpm's
Will see if I can add the second fan next week and then the temps should stay this low no matter how hard the inverter works.

Very cool. I also have a sunsynk 5kW. I would love to see where you placed the fans!

Sincerely

Jason