Module parameters:
Module name: 5A step-down constant voltage constant current MPPT
Module nature: Non isolated buck module (BUCK)
Input voltage: 6-36V
Output voltage: 1.25-32V continuously adjustable, (default output 5V, if you need other voltages, please explain to the shopkeeper.)
1.25-32V fixed output (for Pi quantity customers), default shipment is adjustable output
MPPT voltage setting range: 6-36V
Output constant current range: 0.05-5A (default output constant current is 3A, if you need other current values, please explain to the shopkeeper)
Output lamp range: 0.01-5A (default lamp current is 0.3A, if other current values are required, please explain to the shopkeeper) There may be some error in the current range due to differences in part parameters.
Working temperature: -40~+85 degrees Celsius
Working frequency: 180KHz
Conversion efficiency: 95% higher (efficiency is related to input and output voltage, current, and voltage difference)
Short circuit protection: Yes (limit the current to the set constant current value)
Overtemperature protection: Yes (automatic shutdown output after overtemperature)
Input reverse protection: None, (if necessary, please input a diode in series)
Output anti backflow protection: None. When connecting the output to the battery, be sure to add anti backflow diodes, otherwise the module will be burned out! Remember! (There is a reserved location for anti backflow diodes, which can be added on your own. Please refer to the instructions below for the method.) Alternatively, you can choose the ideal diode from our store, which has lower losses and higher utilization of solar panels.
Charging indicator: The red light is on when charging, and the green light is on when fully charged. The detection method for rotating lights is current. When using solar panels for power supply, the charging current during solar hours is also very small, lower than the turning light current, and the green light will also light up, but it is not fully charged at this time. Please pay attention to distinguishing. Using a charged meter will provide a more direct view of the charging current.
Installation method: 4 3mm screws
Wiring method: Wiring terminal (soldered output when equipped with a shell) IN is the input, OUT is the output
Module size: 60mm long, 31mm wide, and 22mm high (excluding the meter head)
Attention: The current detection of the module is a low-end detection. Please do not short circuit the input negative pole and output negative pole directly with wires!
If the module has no output voltage, please first turn the MPPT setting potentiometer clockwise until there is voltage output.
1. Set output voltage: Adjust the constant voltage potentiometer (CV) according to the float charging voltage value of the battery you want to charge, or the voltage value of the LED after series or parallel connection, and set the output voltage to the desired voltage. (without load connection)
2. Set the current indicator for turning the light: After setting the output voltage, turn the CC potentiometer counterclockwise for about 20 turns, use a multimeter to short circuit the 20A current output, adjust the CC potentiometer to the current you need to turn the light, and then adjust the turning light potentiometer until the green light is just on.
3. Set a constant current value: After adjusting the lamp current, the 20A current range of the multimeter still has a short circuit output. (A direct wire short circuit output with a voltage and current meter can be used) Adjust the CC potentiometer to the current value you need to set. When setting the output current using the short-circuit method, the actual charging current will be smaller than the short-circuit setting current, which should be that the battery has residual voltage. If you want to set an accurate charging current, please connect the discharged battery to the output and then set the output current
Attention: When setting the constant current, the voltage should be higher than 1.25V, otherwise the constant current function will fail.
4. Set MPPT voltage value:
A. The method of using adjustable regulated power supply setting: Adjust the adjustable regulated power supply to the desired voltage value (such as 18V), output without load, and when the module has output voltage, counterclockwise adjust the MPPT setting potentiometer to the critical point where the output voltage just decreases.
B. The method of directly setting with a solar panel: Connect the input directly to the solar panel, set the output voltage according to the load, block some of the light shining on the solar panel, and connect the output to the load. Measure the output voltage of the solar panel with a multimeter (switch to the input voltage display with a voltmeter), and adjust the MPPT potentiometer until the solar panel voltage reaches the high-power point voltage. (The actual voltage at high-power points of solar panels is lower than the nominal voltage, such as 18V solar panels. The high-power point will be around 17.5V.)
You can also adjust the MPPT value by measuring the output current and serializing the current range of the multimeter between the output and the load (with a meter head that can be switched to current display) to adjust the MPPT potentiometer to the maximum output current.
Attention: When using a solar panel to directly adjust the MPPT value, if the power emitted by the solar panel is greater than the load power, please first block some of the light shining on the solar panel to reduce the power of the solar panel, so as to adjust the MPPT value accurately.
The MPPT value is adjusted to the solar panel. The charging current at high power point is 1.651A, which nearly doubles the charging current, and the effect is quite significant.
Application scope:
1. DIY is a regulated power supply with constant current function, which is not afraid of short circuits during use and can protect the load.
2. Power your electronic devices.
3. Charge various batteries, set the charging voltage and current according to different voltages and capacities of batteries, and have a charging indicator function for easy observation of charging status.
4. Using solar panels to charge various batteries, equipped with MPPT function, can increase the charging current by more than twice. Equipped with constant current function, it can prevent battery overcharging and effectively protect the battery.
5. Drive high-power LED, which can be freely combined in series and parallel,
6. As a car power supply, it can power your phone or various digital products.
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