[Product features]
1. The use of high-quality materials, durable
2. All use screwdriver-free potentiometer, can be directly manually adjusted
3. Chip to strengthen heat dissipation, reliable and stable, high power
4. MPPT adjustment voltage real-time display, clear at a glance
5. Wide range of use, solar charging, battery lithium battery charging, LED
Constant current driver, voltage stabilization power supply
[Parameters]
Input voltage range: DC7-80V
Output voltage range: DC1.4-79V
Voltage display range: 1.40-80.00V ( accuracy +0.1V or so )
Output current adjustment range: 0-20A
Current display range: 0.00A-20.00A (precision +0.03A or so)
Adjustment knob: MPPT voltage adjustment, output voltage adjustment, output
Current limit adjustment
MPPT function: Yes
Anti-backflow: battery backflow does not burn, when the sun is not enough without charging current
There will be 0.5-40mA backflow current, it is recommended to connect the diode when charging.
Constant current (current limit): Yes
Over power protection: 300W, beyond the power will shut down the output, display 0PP
Size: 108x64x48mm
[Solar cell charging steps]
1. Measure the solar panel no-load voltage ( sunny), calculate the MPPT voltage =
0.75 * no-load voltage, or directly look at the manufacturer's panel Vmp parameter values.
Note that the positive and negative poles should not be connected backwards.
2. Solar panel access to the module power supply, switch to the display MPPT voltage interface, adjust
Turn the MPPT potentiometer and adjust the value to Vmp voltage.
3. Rotate the CV potentiometer to adjust the output voltage (the size of the floating charge of the battery being charged).
voltage).
4. Short the output positive and negative terminals, rotate the CC potentiometer to adjust the limit current size (the size is the allowable charge voltage of the battery being charged).
The size is the allowable charging current of the battery to be charged).
If the solar panel power is too small, the MPPT lamp will light up when short-circuiting, in order to maintain a constant input voltage, the output current will be
To maintain a constant input voltage, the output current will be limited, and the current can only be adjusted downward.
The current can only be adjusted downward, and the current value seen when the MPPT light is off is meaningful.
It is recommended that the current be adjusted when there is sufficient sunlight or when a constant voltage source is used as the input.
5. Connect the battery to charge (be careful not to reverse the positive and negative poles). MPPT can be properly adjusted
Potentiometer, so that the module has been in the maximum power point output.
It is recommended to connect the diode to completely prevent backflow.
[Attention and reminders]
1. input positive and negative polarity can not be reversed, otherwise it will burn.
2. When the output is connected to the battery, the positive and negative terminals can not be reversed, otherwise it will burn.
3. The maximum output current of 20A is limited to the time when the input voltage and output voltage difference is small.
And the output power does not exceed 300W.
The larger the input and output voltage difference, the lower the conversion efficiency and the more serious the heat.
When the heat is too serious, please reduce the power to use, or add 5V fan by yourself (with reserved
interface, fan current is less than 300mA) to assist in heat dissipation.
4. MPPT voltage - generally set to 0.75 times the open circuit voltage of the solar panel, also
You can look at the nameplate or consult the solar panel manufacturer for the Vmp voltage value, Vmp voltage
value is the MPPT voltage we want to set. The display can show the set voltage.
It is very convenient to adjust at a glance.
The output current limit (CC) value is the allowable charging current of the rechargeable battery.
The method of setting the current is: short circuit the output directly with the wire, look at the current display value
Adjust the CC potentiometer, the displayed value is the current limit value (maximum output current value).