Originally Posted by
simplechamp
Most, if not all, car ESC's have caps across the + and - battery inputs. Some are internal inside the ESC case, others are external on leads like yours. It doesn't matter if you solder the BEC input at the same point as the caps, or at a different point on the battery input wires, or at the battery connector. In terms of the circuit it's all the same point. So that would not be the cause.
It's very possible that it was just a fluke occurrence, a bad component or connection in the BEC. But Castle should take care of it for you no problem.
I would have thought so too. I can really think of nothing wrong with the set up.
However I might just bite the bullet and snag an EZRun SC8 esc. If I plan on running 4s in the buggy then I probably should get a beefier esc.