To the OP
I wish there were - If you find anything please keep us informed
Your concern is a primary reason I stick with Morningstar Solar equipment
No moving mechanical parts aka FANS in their solar charge controllers or their small 300watt inverter. They use large oversized heat sinks, However heat is still an issue and needs to be removed ASAP. From a past life I learned every 10 degree C increase in chip core temp above normal reduces the equipment life by 50% or more.
After a 2 week camping trip in the outback of Montana we found loads of dust and dirt under our silverware container inside the drawer inside the rig - wonder where that can from? Maybe it gets into and sticks on the cooling fans inside converters / interters / etc.... MAYBE