China, as usual, sends the wrong electronics. This fan allowed the second set of 5kW controllers with 3kW motor not to catch fire like the first set of 3kW motor did. I had to shorten the wiring to accommodate the over current from X2 and connect the motor through the 3kW motor wiring for cooling as well as venting. The motor is now running at half temperature and the cable insulation has not melted. Success! BIG SQUIRREN CAGE BLOWER again! I added a Tecumseh Turf engine air filter and it fits perfectly and clean air flows into the engine I was trying to protect.