Tim P

I am amazed by how well this hack works!
I installed this the cheap and nasty way.
Bought 4 x 12cm Ø cooling fans on bid or buy . co . za for R50 each.
Cable tied them together
Used an old 12v 2000mAh CCTV power supply and connected the 4 fans together.
I'm seeing approximately 15 degrees lower temperatures!
My inverter is installed inside a cupboard so I plan to use another 2 fans to push hot air vertically through the top of the cupboard. There is a ±30mm gap on the bottom of the cupboard so it should pull cool air in from the bottom and hot "exhaust" air to go out the top. Thus cooling it even further.

I am amazed by how well this hack works!
I installed this the cheap and nasty way.
Bought 4 x 12cm Ø cooling fans on bid or buy . co . za for R50 each.
Cable tied them together
Used an old 12v 2000mAh CCTV power supply and connected the 4 fans together.
I'm seeing approximately 15 degrees lower temperatures!
My inverter is installed inside a cupboard so I plan to use another 2 fans to push hot air vertically through the top of the cupboard. There is a ±30mm gap on the bottom of the cupboard so it should pull cool air in from the bottom and hot "exhaust" air to go out the top. Thus cooling it even further.

Hi Everyone,
Thought I'd share this because I have noticed a few people concerned or frustrated with the fan noise from the 8kw Sunsynk inverter. I couldn't install my inverter in the garage because I do a lot of woodwork in there and I know the dust would cause issues in the fans and heatsinks. So its mounted at the end of our passage where it meets with the garage through the door. The noise at night was really an issue for me. During load shedding the fans would usually kick in. Specially when the aircons where running. This is obviously when the inverter was doing a lot of work and required cooling. Then also after load shedding when the batteries were charging the fans would come on intermittently. Bloody irritating when trying to sleep.
The following pics is what I came up with. 5 decent quality 92mm PC fans on the vent side to constantly pull air through. Now these fans don't have the CFM or static pressure rating of the built in fans. But they are dead quite and they keep a constant steady flow of air over the heatsinks. On average, they keep the inverter 10-15 degrees cooler according to solar assistant. I have only had them in for 5 days now and the temperature has never gone over 55 degrees which is the trigger point for the built in fans. I ran all 4 aircons plus the air fryer for 30 mins and the inverter got up to 49 degrees. But when idle, it sits at 35-40 degrees. I am still waiting for a full sun day with load shedding where the MPPT's and the inverter are under a decent constant load to see what happens. Today the MPPT's where hitting around 8kw peaks while charging, and about 4kw on the inverter and it never went over 41 degrees.
I have mounted the fans about 10mm of the exit vent so none of the holes get blocked. The idea is that when the internal fans kick in, that air can just blow through my external fans. For now, I have just hot glued the fans to the wall and hot glued a piece of trunking cover to side(proper life hack style =D). I am busy designing a decent 3D printed bracket to hold all 5 fans and clips onto the vent hole at 4 points. No alterations have been done to the inverter at all so no future warranty issues. The fans run off an external 12v supply. I have wired it through a sonoff switch with the idea to control them through home assistant based on inverter load and temps.