The Pulse
Width Modulation (PWM) battery charging can greatly increase the lifetime
of battery. It has various unique functions and quite easy to use, such as: 
12/24V automatic recognition
High efficient Series PWM charging, increase the battery lifetime and 
improve the solar system performance.
Use MOSFET as electronic switch, without any mechanical switch
Widely used, automatically recognize day/night.
Digital LED menu, only one key solve all setting simply
Intelligent timer function with 1-15 hours option
Unique dual timer function, enhance the flexibility of street light system.
Gel, Sealed and Flooded battery type option.
Adopt  temperature  compensation,  correct  the  charging  and  discharging 
parameters automatically and improve the battery lifetime.
Electronic   protection:   Overheating,   over   charging,   over   discharging, 
overload, and short circuit.
Reverse protection: any combination of solar module and battery. 
The controller is for off-grid solar system, especially in solar light system,
and protects the battery from being over charged by the solar module and
over discharged by the loads. The charging process has been optimized for
long battery life and improved system performance. The comprehensive
self-diagnostics and electronic protection functions can prevent damage from 
installation mistakes or system faults.
Though the controller is easy to operate and use, please take your time to
read this manual and become familiar with it. This will help you make full 
use of all the functions and improve your solar PV system.