Powerbank with solar pannel

Other Hardware General Electronics
1

Hello, I want to build a powerbank with solar pannels. Momentanly I have 2 solar pannels 5VDC 400mA, 18650 batteries and LED Dual USB 5V 2.4A Micro/Type-C USB Mobile Power Bank 18650 Charging Module Lithium Battery Charger Board Circuit Protection. ( https://shorturl.at/aoTV8)

Now I would need a scheme or help to be able to achieve this project. From what I understand the solar panels need to be connected to a zenner diode but I don't know exactly which one all I have at the moment is a 4.7v diode which I don't know if it's ok to put in the circuit.

So if you could help me with a scheme or any help is welcome.

2

Post an annotated schematic of your planned system. Be sure to show all parts, connections, power sources and loads.

1 Like
3

Adafruit carries well designed solar charge modules. I recommend that you consider using them, or at least carefully study the design principles. All the details of the designs are published.

5

Depends of what you really have. Just plain panels or panels with usb connector?
Most panels 5V/400ma are with usb and have circuit already inside. So don't start playing with diodes, it this is the case.
Show what you have.

6

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.