The REDARC 12- and 24-volt Solar Remote Monitor allows the user to monitor solar panels, battery and system information. This product is only compatible with our 10, 20 and 30A Solar Regulator (SRPA range). For use with REDARC SRPA regulators. Large, backlit 3” display. Real time system monitoring. Designed for 12- or 24-volt systems. Required for battery setting and configuration changes to SRPA regulators