The REDARC BCDC1220-IGN is a 12/24 Volt 20 Amp DC DC charger featuring technology designed to fully charge a lead acid auxiliary battery. It’s suitable for vehicles fitted with an ECU-controlled variable voltage alternator and fully potted to survive and thrive against heat, water, dust and vibration.The BCDC1220-IGN features a lower voltage setting so it can continue to operate with a low input voltage from the alternator.The BCDC dual battery charger will work with a wide operating range (9 – 32V) giving the option of charging from both 12V and 24V vehicle systems.By providing a unique charging profile to each specific battery type, the BCDC charger is able to achieve and maintain an optimal charge in auxiliary batteries whilst on the move. It will allow you to charge an auxiliary battery that is a different characteristic to the start battery.