Morningstar Sun Light 20L-24v Charge Controller
Morningstars advanced SunLight solar lighting controller combines the SunSaver design with a microcontroller for automatic lighting control functions.
This Technology Provides: 
Proven Reliability 
Precise Lighting Control 
PWM Battery Charging 
Operation:
Rotary digital switch to select among 10 lighting options (see back) 
Test button flashes red LED to confirm correct rotary switch selection 
Test button turns lights on for 5 minutes (in LVD limited to 3 times) 
LVD overrides lighting timer 
Sunrise overrides lighting timer 
Timer accuracy is within 2 seconds 
Sunlight 20-24V Charge Controller