@@mehmetyuksel9465 It is a kind of fake MPPT. It controls how hard the solar panel is loaded and keeps it at 18V. That is around where most solar panels have their MPP at full sunlight, but a true MPPT would try different loads and find the optimum load with the highest output power. If there are clouds or the sun is setting, the Maximum power point shifts down to 16V or lower. This cheap MPPT just stops regulating when the solar panel output is below 18V and acts like a resistor and wastes power in low light, but still can tickle charge, so it is still better than PWM that just loads the solar panel at battery voltage, but it is not a true MPPT.
Could you test the mpp of your panel? I have a similar charging module but it seems that my 10 W panel has a maximum power point at 13 V instead of 17 V, and I'm trying to understand if it is a problem of the cn3722 or the panel itself.
Those are not true MPPT, there's no tracking involved, it works with a Vmp set by a resistor, the default for that board is either 12 or 18V iirc, refer to the datasheet, alternatively, buy the variant of the CN3722 with the 2 multiturn precision pots if you don't want to replace SMD resistors as they let you adjust them
Thank you for this video! This is exactly what I needed to know.
Glad it was helpful!
This module can be used with bms integrated batteries?
Cool CASIO calculator.
can it be modified to have more charging current? it seem have 1A at max
Hi! What package is the resistot? Thanks
32K =14.15V! Works perfectly in my car.
This pcb mppt or pwm
@@mehmetyuksel9465 It is a kind of fake MPPT. It controls how hard the solar panel is loaded and keeps it at 18V. That is around where most solar panels have their MPP at full sunlight, but a true MPPT would try different loads and find the optimum load with the highest output power. If there are clouds or the sun is setting, the Maximum power point shifts down to 16V or lower. This cheap MPPT just stops regulating when the solar panel output is below 18V and acts like a resistor and wastes power in low light, but still can tickle charge, so it is still better than PWM that just loads the solar panel at battery voltage, but it is not a true MPPT.
Could you test the mpp of your panel? I have a similar charging module but it seems that my 10 W panel has a maximum power point at 13 V instead of 17 V, and I'm trying to understand if it is a problem of the cn3722 or the panel itself.
Those are not true MPPT, there's no tracking involved, it works with a Vmp set by a resistor, the default for that board is either 12 or 18V iirc, refer to the datasheet, alternatively, buy the variant of the CN3722 with the 2 multiturn precision pots if you don't want to replace SMD resistors as they let you adjust them
Use a potentiometer to adjust it