DIY Solar Powered Charger Using Solar Panel & Battery
A DIY Solar Powered Charger is a simple and practical electronics project that converts sunlight into usable electrical energy for charging USB devices. This project uses a solar panel, TP4056 battery charging module, 18650 Li-ion battery, voltage booster module, and an SPDT switch to create a portable Solar charging system.
The charger stores solar energy in a rechargeable battery and then boosts the battery voltage to a stable 5V USB output, making it suitable for charging smartphones, Bluetooth devices, mini fans, USB lights, and other low-power gadgets.
Components Requirement
- 6V Solar Panel – https://amzn.to/4uija5e
- TP4056 Charging Module – https://amzn.to/3PI8lLS
- 18650 Li-ion Battery (3.7V) – https://amzn.to/4fq4DAQ
- DC-DC Voltage Booster Module – https://amzn.to/3Q5K1Dx
- 1N4007 Diode – https://amzn.to/4e2LXoj
- Switch
- USB Output Module
- Connecting Wires
Wiring Connections
this is the circuit diagram of solar powered charger –
Circuit Working
1: Solar Energy Collection
The solar panel converts sunlight into DC electricity. During daytime, the panel generates voltage which is sent to the charging circuit.
2: Reverse Current Protection
A 1N4007 diode is connected between the solar panel and TP4056 module. The diode prevents reverse current flow from the battery back into the solar panel during low-light conditions or at night.
3: Battery Charging
The TP4056 charging module safely charges the 18650 lithium-ion battery. This module prevents overcharging and provides controlled charging current.
4: Energy Storage
The 18650 battery stores solar energy collected during the day. Stored energy can later be used even when sunlight is unavailable.
5: Voltage Boosting
Since the battery provides approximately 3.7V, a voltage booster module increases the voltage to a stable 5V output required by USB devices.
6: Output Control
The SPDT switch controls the power flow to the voltage booster, allowing the charger to be turned ON or OFF when required.
USB Charging
The boosted 5V output is available through the USB port, enabling charging of mobile phones and other USB-powered devices.
Advantages
- Uses free renewable solar energy
- Reduces electricity consumption
- Useful during power outages
- Eco-friendly charging solution
- Low-cost DIY project
- Easy to build with basic electronics knowledge
Applications
- Mobile phone charging
- Emergency backup charger
- Camping and outdoor activities
- USB LED lighting systems
- Educational renewable energy projects
- Science exhibitions and demonstrations
Conclusion
This DIY Solar Powered Charger is an excellent beginner-friendly renewable energy project. By combining a solar panel, TP4056 charging module, 18650 battery, and voltage booster, you can build a compact portable charger capable of storing solar energy and delivering a stable 5V USB output. The project demonstrates practical energy harvesting, battery management, and voltage conversion concepts while providing a useful everyday charging solution.
