Solar Charge Controller for managing battery charging which helps to increase a batteries lifetime by preventing overcharging and over discharging. Controller includes priority charging function to set between 10% and 90% of solar panel power to battery one or two. Battery should be 12V or 24V Microcontroller digital accuracy. State of charge (SOC) showing battery condition Pulse Width Modulation with four stages of charging. Controller charges battery types: Lead Acid, AGM and Gel Electronic Protection Against. Short circuit. Reverse current. Reverse polarity. Lightning-protection. Overcharge protection. Over discharge protection Type: Solar Charge Controller Maximum Input Volts: 41V Maximum Input Watts: 260W for 12V batteries, 520W for 24V batteries Boost Voltage: 14.6V Bulk Voltage: 14.5V Float Voltage: 13.8V Model Number: 20A Solar Charge Controller Application: Charger Controller colour:Black Material:Metal + plastic Package Contents: 1 x Solar Charge Controller Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.