The MPPT Controller adjust the battery charging current and voltage, which makes the output voltage of the solar panel always near the maximum power output point, so as to ensure that the system can obtain the maximum output power from solar cells. 
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<br />On the one hand, it can greatly improve the utilization efficiency of solar panels, on the other hand, it can effectively protect the battery.
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<br />Protection:
<br />1.  PV Reverse Polarity Protection
<br />2.  Battery Reverse Polarity Protection
<br />3.  Battery Over Charge Protection
<br />4.  Battery Over Discharge Protection
<br />5.  Output Over Current and Short Circuit Protection
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<br />Specification:
<br />Model:CPT-LA05
<br />Type of battery:lead-acid battery
<br />Max. charge current: 5A
<br />Max. discharge current: 10A
<br />Rated voltage: 12V/24V auto work
<br />Max. charge voltage: 14.7V/29.4V
<br />Cut-off discharge voltage : 10.5V/21.0V
<br />Over discharge recovery voltage: 12V/24V
<br />DC output: Quadruple DC 12V output, total load capacity is 6A,with over current protection
<br />USB output: Dual USB 5V output, total load capacity is 3A,with over current protection
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<br />User instruction
<br />1.  PV charging status indicator
<br />When the system connection is correct, and the solar panel has abundant sunshine, the charging indicator ?? (green light) is constant ON, it means the charge function of the system is normal and it can charge.
<br />2.  Load startup conditions
<br />The load is allowed to start only when the battery is in the state of 50% ??100% , but once started. Once the load has open, it can work until the Battery 25% indicator ?? (flashing). When the battery further decline to the cut off discharge voltage, the Battery 25% indicator ?? (red light ON), the load forced to cut off the output in order to protect the battery.
<br />3.  The start of the output over current and short circuit protection
<br />When the load output is normal, the load output indicator constant ON.
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<br />When the output current is higher than rated current or the short circuit occurs, the system output and the extensional output will enter into the protection state, then the load output indicator ?? flickers. The controller would automatically cut-off all the output. After 10 seconds the controller will automatically return to work, if the troubleshooting has finished.
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<br />Package Includes:
<br />1x Solar charge controller
<br />4x DC 12V Cable
<br />1x English instruction manual