Reviews: Painless Wiring 250 AMP Dual Battery Control - 40102

Installation was easy enough, be prepared for the expense of 2ga wire, it was about 100$ with all the ends for my application(one battery on each side of the engine bay.) Finding the hot wire in the cranking and run position was the most difficult part.just make sure to have a good test light. But to be able to change both batteries and separate them is awesome and when you connect the 2 batteries together you can feel the power when you start the truck. I can't wait to drain my primary battery and get to use the secondary to start up, with just the flick of a toggle. crazy I know! Price is okay for the overall kit and a top name in the field. A good solenoid is just expensive. I looked for a long time before deciding on this kit. it's Best one I could get I feel.