NOTE: The price mentioned is excluding shipping charges.

The rapid growth of electric vehicles has created a strong demand for clean, cost-effective, and energy-efficient transportation. However, traditional electric bicycles depend only on grid charging, which limits their range and causes downtime during recharging. To overcome these limitations, the Solar Bicycle with Automatic Battery Changeover introduces a renewable and uninterrupted power solution by integrating a solar charging system and dual-battery configuration. In this project, a solar panel is used as the primary energy source to charge two batteries through an MPPT (Maximum Power Point Tracking) charger, which maximizes energy harvesting from sunlight. A PIC microcontroller forms the intelligent control unit that continuously monitors the voltage levels of both batteries. When the running battery becomes weak, the controller automatically shifts the motor load to the second battery without stopping the bicycle. At the same time, the discharged battery is connected back to solar charging, allowing the vehicle to keep moving while charging in the background. The system uses relays, voltage sensors, gate-switch motor control, PMDC motor drive, throttle input for acceleration, and brake signals for motor cut-off. An LCD display provides the rider with real-time information on both battery voltages and system status. This bicycle greatly enhances riding range, reliability, and energy efficiency, promoting eco-friendly transportation powered by solar energy.    

Objectives:

 To design a solar-powered bicycle using an MPPT charger for maximum solar energy utilization.

 To implement dual rechargeable batteries for extended driving range.

 To monitor battery voltages continuously using a PIC microcontroller.

 To achieve automatic battery changeover during the ride without interrupting motor power.

 To enable automatic solar charging of the low-voltage battery.

 To display real-time voltage levels of both batteries on an LCD.

 To ensure safe and smooth motor operation using throttle and brake inputs.

 To promote renewable, pollution-free, and cost-efficient transportation.      

The major building blocks of this project are:  

• Solar.
• MPPT module.
• Two 2-chanel relay boards.
• 2 Batteries.
• Throttle.
• Brake.
• PIC microcontroller.
• LCD display.
• Two Voltage sensors.
• PMDC motor.

    Software’s used:  

• PIC-C compiler for Embedded C programming.
• PIC kit 2 programmer for dumping code into Micro controller.
• Express SCH for Circuit design.

     

video: