If you use  solar  lights, you should be regulating the panel current charge  in accordance with the battery voltage, and this 12V/24V 20A solar controller, with LED  indicator lights and digital display, is just the tool for the job.

Benefits:

 
• PWM charge mode [SOC]
 
• Fully automatic operation
 
• Electronic protection
 
• Suitable for all 12V & 24V lights
 
• Microcontroller for digital accuracy
 
• Manual test capability
 
• Detects day/night by using PV array
 
• Single digital LED display
 
• Temperature compensation
 
• 16 field adjustable lighting and timer control options

The solar controller is brand new  and boxed and comes with wiring diagrams and instructions

Specifications:

 
• Voltage: 12V/24V
 
• Charge current: 20A
 
• Load current: 20A
 
• 25% current overload: 1 min.
 
• Load disconnect: 11.1V or 22.2V [depending on 12V or 24V voltage]
 
• Load reconnect: 12.6V or 25.20V [depending on 12V or 24V voltage]
 
• Equalization voltage [10 mins]: 14.6V or 29.2V [depending on 12V or 24V voltage]
 
• Boost voltage [10 mins]: 14.4V or 28.2V [depending on 12V or 24V voltage]
 
• Float voltage: 13.6V or 27.2V [depending on 12V or 24V voltage]
 
• Temperature compensation [mV/?C]: -30mV or -60mV [depending on 12V or 24V voltage]
 
• Operating temperature: -35 ~ +55?C
 
• Dimensions: 140 x 95 x 32mm
 
• Weight: 190g

V1.0