The Connect Ease RCE412VRV Parallel Quick-Connect System allows for connecting four 12-volt batteries together in parallel to provide users increased run time when away from any wired, plug-in power source. The Connect Ease Four 12V Parallel System was specifically designed with RV and off-grid enthusiasts in mind who may require long-term power. The RCE412VRV is compatible with Lead Acid, AGM, and Lithium batteries and can be used with 24V, 36V, 48V, batteries in a parallel configuration. Specifically designed with RV and off-grid enthusiasts in mind Compatible with lead acid, AGM, and lithium batteries | Connect Ease Four 12V Battery Parallel Quick-Connect System for RV / Off Grid