I've bought a dual battery system a while ago but havnt got it fitted up properly yet. I bought it just before xmas and as the power cable i got with the kit wouldnt reach the battery in the boot i just sat it on the backseat floor for the trip. I got back and bought a longer cord but without measuring how much i need and guessing the new cord i bough pulled up short as well.

So i was gona use the 2 cords to span the difference. But i still cant have the electronic battery controller mounted in the engine bay . Will it be alright if i mount it in the cabin probably within reach of the drivers seat at all? That way i can reach the battery in the boot plus i can reach the button on the electronic controller to jump start the car if i get a flat from in the car. Will this work. Was probably gona mount it on the side of the centre console or will it need to be higher. Biggest problem i can see having it there is if the car fills with water it will be swamped.

Question 2 is the other problem i got is the 2 cords i got are different sizes. One is a 14oammp power cord and the other is a 215amp power cord. Will this cause any problems and if not will it matter which way i run the cords. Like am i better having the 215amp or 140amp from battery to controller and then from controller to second battery.