Note: This module has three input voltages 6V 9V 12V, corresponding to the working voltage (nominal voltage) of solar panels 6V 9V 12V
This is a solar charger for maximum power point tracking ( MPPT ) of a single lithium battery . This MPPT solar charger enables you to take as much power as possible from a solar panel or other photovoltaic device and put it into a rechargeable lithium battery. It’s so easy to use, just plug the solar panel into one side of the solar charger, then plug the battery into the other, and you’re ready to go!
Solar maximum power point tracking ( MPPT ) is to ensure that the light intensity changes and the photovoltaic cells output the maximum power to make full use of the solar energy. Typically, a switch-mode DC-DC converter is required to implement the MPPT function, keeping the product of the output voltage and charging current maximized (output).
The output of the solar charger is designed to charge a single polymer Li-ion battery. The load should be connected in parallel with the battery. Each solar charger is equipped with a CN3791 power tracking battery charging circuit and pre-installed with four 2 -pin JST/PH2.0 connectors.
By default, we set a hold voltage for MPPT . So we have 3 versions, the input voltage is 6V , 9V , 12V (corresponding to the working voltage of solar panels 6V / 9V / 12V ), which is very suitable for applications with a large voltage difference between the input voltage and the battery voltage.
When the current output capability of the input power supply decreases, the internal circuit of CN3791 can automatically track the maximum power point of the solar panel, and the user does not need to consider the worst case, and can maximize the use of the output power of the solar panel, which is very suitable for applications powered by solar panels .
Note: If the CN3791 MPPT solar charger is a 9V version, you must use a solar panel whose operating voltage is 9V .
Input voltage: Select the corresponding module ( 6V/9V/12V ) according to the nominal voltage of the solar panel Output
voltage: Nominal 3.7V is fully charged and the end voltage is 4.2V Lithium battery Single string lithium battery charge management
Interface: 2pin PH2.0/JST
Solar panel maximum power point tracking function
Complete charge management for single-cell Li-ion batteries
Charging current up to 2A
PWM switching frequency: 300KHz
Constant voltage charging voltage: 4.2V ± 1%
Constant charge current set by external resistor
Trickle charge a deeply discharged battery
Automatic recharge function
Charging status and charging end status indication
soft start function
Battery terminal overvoltage protection
Working environment temperature: – 40 ℃ to + 85 ℃