I’m thinking about adding a second battery to the p5 but I’m not sure if I need an isolator or not. I’ve never had a problem with the battery or charging system but since I switched from the 3500 lbwinch to a 5000 lb winch is does cut out under heavy use. If the radio is playing while I use the winch it all shuts down after about 5 seconds. If the radio is off the winch pulls for a while but sometimes I have to let off the button and give it a few seconds then it’s pulling again. Being that I’ve never had issues with it starting do I really need an isolator?