capacitors
 

Hi all I'm brought a hw v3.1 esc with no capaciborium soldering on
Is it necessary to have one put on .

The ESC will work without but will reduce the life of it. The capacitor smooths out voltage spikes created in the ESC that will otherwise create heat. I reversed the polarity on an HW v2.1 luckily it was only a spark before I realised and stopped myself. After it I had no punch at all and thought I'd blown the ESC, turned out there is a fuse on the HW cap board that protects the caps, replaced the board and all good again