CTEK’s 140A OFF ROAD CHARGING SYSTEM combines the D250SA 20A charger with the SMARTPASS 120 power management unit for the ultimate off-road charging system. It makes sure your vehicle and your onboard equipment have full power, right when they need it, so you can stay off road for even longer. For complete peace of mind, you can see at a glance how much charge you’ve got left and the length of time till your batteries are discharged.