SolarEdge Inverter Active Cooling Mod

thingiverse

This is a quick and dirty design I did for my SolarEdge inverter (SE11400H-US). Although it's mounted in my garage, I'm in Arizona so it definitely gets hot - my first one died after a bit under a year, and measuring the heatsink on the back it can easily get over 140f - so I decided to put some 120mm ducted fans on the top (to pull the air through the heatsink), as well as have them temperature controlled (the device in the picture is a PID-based PWM fan controller). In my application, I set the target temp to 95f, and on most days it's able to achieve this, and when the ambient temperature rises too high I still generally stay under 105f, so a win in my book. ;) It's designed to be printed upright without supports, and everything turns out ok except the part where you screw in the fans, but it's not terrible just a bit ugly (but thankfully not visible). Because my I3 mk3 doesn't have a large enough volume, I printed 3 of these and hot-glued them together, and put some foam insulation on the left and right side to bridge the gap between the slightly lower fins on the outer edges. In my case, this fits perfectly between the wall and the unit, covering 100% of the heatsink. The exact fans I used are these - but any 120mm should work fine: https://www.amazon.com/dp/B0912TTCB9?psc=1&linkCode=sl1&tag=ana024-20&linkId=25e0498169bdbaa15d68d1c16a0f185d&language=en_US&ref_=as_li_ss_tl And you'll need to drill out the holes to screw them into - I tried modeling them in but it was more of a pain than it was worth, so I just broke the part apart in prusa slicer and set the infill to 100% for the mounts.