Sun YOBA Solar Charge Controller MPPT Solar Controller Tracer4210A 12V 24V Advanced Maximum Power Point Tracking (MPPT) technology, with efficiency no less than 99.5%. LCD panel display design, dynamically displaying tool's operating data and working condition. Multuple load control modes: manual mode, light ON/OFF, light On+Timer and test mode. RS485 port with industrial standard MODBUS open architecture . Fully programmable function via PC software or remote meter MT50(Not included).