Portable Modular Solar Power Supply

A compact and modular solar-powered power supply designed for DIY electronics, portable energy systems, camping, prototyping, and educational projects.

This project combines a custom 3D-printed enclosure, lithium battery system, USB-C charging, adjustable solar panel mounting, and interchangeable DC-DC output modules to create a flexible portable power solution.

## Features
• Portable and compact design  
• Adjustable solar panel angle  
• USB-C charging support  
• Battery level indicator  
• Reverse current protection using 1N5819 Schottky diodes  
• Modular output voltage system  
• Fully custom 3D-printed enclosure  
• Custom-designed battery holder for secure and easy battery installation  

Depending on the selected DC-DC converter module, the system can provide different output voltages such as:
• 5V  
• 6V  
• 9V  
• 12V  

The solar charging system uses a CN3065-based solar charging module compatible with 4.5V–8V solar panel input.

In this project, I used two 3V solar panels connected in series to achieve the required voltage for the charging module.

Electronic Components 

•DD05CVSA 3.7V to 5V/6V/9V/12V DC-DC Boost Converter Module 

https://s.click.aliexpress.com/e/_c3jki9tD 

https://s.click.aliexpress.com/e/_c4dGshRH

•USB-C Female Connector ×2 

https://s.click.aliexpress.com/e/_c3QlbQan 

https://s.click.aliexpress.com/e/_c3WtvQWB 

•3V Solar Panels ×2 

https://www.aliexpress.com/item/1005005825496564.html 

•3.7V Lithium Batteries ×2 

https://s.click.aliexpress.com/e/_c4rpP2s7 
 •Battery Level Indicator Module 

https://s.click.aliexpress.com/e/_c3mNqoHd 

https://s.click.aliexpress.com/e/_c4F3fCSB

 •1N5819 Schottky Diodes ×2 

https://s.click.aliexpress.com/e/_c4sNn7Qj 

https://s.click.aliexpress.com/e/_c3rsofcX

 •ON/OFF Switch 

https://s.click.aliexpress.com/e/_c2uZn3E7 

https://s.click.aliexpress.com/e/_c3kUSDtt

 •Electrical Wires(26 AWG) 

https://s.click.aliexpress.com/e/_c4MCrCvd

 https://s.click.aliexpress.com/e/_c44Gu3cJ 

•Heat Shrink Tubing 

https://s.click.aliexpress.com/e/_c4kFO6l9 

https://s.click.aliexpress.com/e/_c42Cs04T

## Included Files
All STL files required for printing the enclosure and battery holder are included.

## Assembly
The project includes:
• Electronics wiring  
• Battery installation  
• Solar panel assembly  
• Adjustable hinge mechanism  
• USB-C input/output connections  
• Circuit overview  

You can also watch the complete assembly and wiring process on my YouTube channel.

This project is designed for makers and DIY enthusiasts who want to build a customizable portable solar power system using affordable electronic components and 3D printing.

If you build this project, feel free to share your printed version and modifications.