BQ24650 18V 8A Solar Lithium Battery Charging Board Charger Module MPPT Module With Heat Sink

BQ24650 18V 8A Solar Lithium Battery Charging Board Charger Module MPPT Module With Heat Sink

Advantages:
- High-power tube for ON Semiconductor as MOS
- Input anti-surge Tvs
- Original brand new inductor for TDK
- Designed with heat sink
- Better and more stable performance

Circuit Characteristics:
- Maximum power point tracking of solar cells, its output current is greater than solar panel current, truly ultra-high efficiency MPPT, supports 5V-28V, solar panels within 120W (for more current charging, it is recommended that each solar panel is equipped with this module)
- Output voltage can be adjusted arbitrarily, CC-CW automatic control (supports single or multi-cell lithium batteries or lithium iron phosphate or lead-acid batteries, high-power LEDs, etc.)
- Ideal diode at the input to prevent backflow, with low loss
- Synchronous rectifier and step-down circuit, high efficiency and low heat generation
- Complete battery charge management, full charge stop, not always trickle, effectively avoid electrolyte drying up
- High precision ±0.5% cut-off voltage
- Maximum support solar power: 120W
- PWM switching frequency: 600KHz, high frequency, low resistance and high efficiency
- Constant current charging current is set by external resistor (preset 5000mA)
- Trick charge the deeply discharged battery
- Double indication of charging status and charging end status (charging red light on/full light on/off no battery or no input)
- Soft start function
- Battery terminal overvoltage protection
- When not using solar energy, it also serves as a notebook 9-28V adapter at the same time, which is multi-purpose
- 7pcs large-volume filter capacitor MLCC for Murata, copper tape inductor for SUMIDA, more stable work and larger current output

Parameters:
- Volume: 50 x 25 x 11mm/2 x 1 x 0.4", 11g/ lb. Ultra-thin and ultra-small, there is no pressure in the solar control box
- Input voltage: 5-28V (the absolute maximum value is 28V, it is recommended to use it below 24V. The input must be greater than the output voltage)
- Output voltage: 4.2V-28V plus or minus 0.5% precision potentiometer adjustment, can only step down, the output must be lower than the input
- Output current: default 5.6A
- Precharge current: default 0.8A, 0.1 times output current
- Termination current: default 0.8A, 0.1 times the output current
- Charging efficiency: 96% at 16V input, 12V 8A output
- Leakage when not charging: about 200uA

Package Included:
- 1 x MPPT Module

Note:
- MPPT and basic electrician knowledge are highly recommended.
- All the modules have passed tests before delivery.
- Batteries are not included in the package.

Precautions:
- Please closely monitor your battery voltage during the first charge to prevent overcharging! Do not charge the lithium battery without protection board!
- When using in vehicles, please connect a capacitor of about 1000uF in parallel at the input end, parallel a one-way TVS of about 16V and a capacitor of about 1000uF at the output end, and then connect a 10A fuse in series to the car battery. Otherwise it is very easy to burn out due to car interference!
- This circuit can only be used for lithium ion, lithium iron phosphate, lead-acid batteries with protection for direct charging of solar cells.
- We are not responsible for any accidents caused by battery explosions and other injuries!
- Reverse connection is not allowed. It will burn out if connected reversely! Do not connect the positive and negative poles wrong!
- Indicator status: off=no input or no battery connected, red=charging, blue=full, red flashing=fault (such as high temperature, battery overvoltage).

Use Adjustable Power Supply to Adjust:
1: Adjust an adjustable power supply to the solar MPPT voltage (nominal 18V solar is generally 15-16V) and connect it to the input of the module.
2: Use the voltage mode of a multimeter to measure the output voltage of the module. First adjust the mppt potentiometer clockwise until there is no output voltage, and then slowly adjust the mppt potentiometer counterclockwise until there is just an output.
3: Increase the adjustable power supply voltage by 1V to ensure stable work. Use a multimeter to measure the output voltage of the module and fine-tune the CV potentiometer. At this time, the output voltage fluctuates (because your battery is not connected). The highest value of fluctuation is the final stop charging voltage. If the voltage fluctuates from 8.0-8.4V, then 8.4V is the final stop charging voltage. If you need to reduce fluctuations, you can connect a large-capacity electrolytic capacitor to the output.
4: Connect a solar panel and a battery for actual measurement. Please pay close attention to whether the output voltage is correct during the first charge to prevent overcharging!

Use Solar Panel to Adjust:
1: Connect a solar panel to the input end of the module.
2: Use the voltage mode of a multimeter to measure the output voltage of the module. First adjust the mppt potentiometer clockwise until there is no output voltage, and then adjust the mppt potentiometer counterclockwise until there is just an output, and then turn it counterclockwise for a half turn.
3: Fine-tune the CV potentiometer. At this time, the output voltage is fluctuating (because the battery is not connected). The highest value of the fluctuation is the final stop voltage. For example, if 8.0-8.4V fluctuates, then 8.4V is the final stop charging voltage. If you need to reduce fluctuations, you can connect a large-capacity electrolytic capacitor to the output.
4: The output is connected to a basically dead battery, a string ammeter is used to measure the charging current, and the MPPT potentiometer is fine-tuned to maximize the charging current (make sure to adjust when it is in direct sunlight on a sunny day). Please pay close attention to whether the output voltage is correct for the first charge to prevent overcharging!

Various Battery Reference Voltages:
* 3.7V lithium battery--4.2V. 2-string 8.4V, 3-string 12.6V, 4-string 16.8V
* 3.2V lithium iron phosphate battery--3.6V. 2-string 7.2V, 3 -string 10.8V, 4-string 14.4V
* 6V lead-acid battery--6.8V
* 12V lead-acid battery-13.6V
* It is not recommended to charge Ni-MH or Ni-Cd battery packs