In dual battery setup, a DC DC charger allows you to charge an auxiliary battery from the alternator whilst driving. With the DC DC charger, the main battery remains unaffected and always ready to start the car. And the DC DC charger can activate lower input voltage operation to suit vehicles with smart alternators. This 12V DC DC battery charger can utilize a solar panel or a starting battery linked to the alternator, while giving the priority to a solar input to place less load on the alternat
