The Best 40Amp DC-DC battery charger 2021
This 40Amp 12V DC-DC charger from Renogy is a great helper for traveling in your RV on rainy days. It charges the battery with electricity generated by the caravan’s engine and can deliver up to 40Amps to the battery (Renogy has another version that can deliver up to 60Amps). It supports charging of multiple battery …