82-0123-01 Auxiliary Battery Charger，Intelligent Dual Battery Charger, 12V System Adapter，Be Suitable for Xantrex 82-0123-01 Echo Charge，Suitable for RV, Marine and Solar EquipmentCompatible with Xantrex 82 0123 01 Freedom Echo Charge Automatically adjusts for 12 or 24 volt battery banks Automatic Charging SwitchFeatures intelligent switching, prioritizing charging for the main battery and automatically charging the auxiliary battery once the main battery is full, offering fully automated operation without manual intervention. Versatile CompatibilityWidely applicable for RVs, boats, and solar systems, making it ideal for long