According to the voltage of battery, controller will adjust the charging current and decide if to supply power to the loads.
1. Generally keep the battery on full voltage condition.
2. Prevent the battery from over-charging.
3. Prevent the battery from over-discharging.
4. Prevent the battery from supplying power to solar panels during nights.
5. Overloading protection.
6. Short circuit protection.
7. Reverse current protection.
8. Reverse polarity connection protection.
9. Lighting protection.
10. Over discharging protection.
11. Over charge protection.
12.The temperature compensation.

Charge regulator	SUUNNY SLC20
Model	12V/6A,12V/10A,12V/15A, 12V/20A, 24V/6A,24V/10A,
Nominal voltage	12v or 24V
Working principle	PWM
Type of connection	parallel
High charge disconnection	14V or 28V
High charge reconnection	11.8V or 23.6V
Indicator of a battery charge	LED display
Maximum charge current	6A, 10A, 15A, 20A
Maximum discharge current	7.2A, 12A, 18A, 24A
Voltage drop between PV panel and regulator	80mV
Voltage drop between regulator and battery	200mV
Temperature compensation	-3MV/CELL·$B!n(J
Low-charge disconnection	10.5v or 21V
Low-charge reconnection	12.6v or 25.2V
Maximum own power consumption	30MA
Short-circuit protection	yes
Protection against reverse polarity	yes
Operating temperature range	-20$B!n(J~60$B!n(J
Packing size	105*55*115mm
Weight	0.14kg
Working life	8 years
Guarantee	2 years limited warranty
Certificate	CE, ISO9001