3 12V Battery Parallel Quick Connect SystemThe Connect-Ease RCE312VRV allows connecting three 12-volt batteries in parallel to increase users&'; runtime when away from any wired, plug-in power source. The Connect-Ease (3) 12V parallel system was specifically designed with RV and off-grid enthusiasts in mind whose power requirements may also require a "solar" connection. The RCE312VRV is compatible with other solar products, and does provide a direct Heat Shrinkable accessory splice connection that can be used to input to a solar panel; other additional, third-party low amperage accessories can be added.Features: Plug & Play Connections Solar connection designed to recharge all 3 12V batteries. Handles 60 to 240 amps of DC power. Lithium Compatible