My RadRunner that I purchased in Nov '19 stopped working. It keeps blowing the 40A fuse located in the battery. I checked everything per Help articles on RadPower site but no help. Finally, I decided to take a look at the controller itself. I opened the box and found a lot of junk from moisture inside. I never ride the bike when it is wet, but I have run through small puddles if I could not avoid it. The controller is not water tight at all. There are no seals and the cover does not fit tightly so no wonder water got there. Anyway, I also found one of leads from the (large) capacitor corroded away. That is bad design! I wrote to RadPower Support to see what they have to say.
I attached a pic of the controller and the missing wire is circled.