Green Energy Solutions for Bus Stop Passenger Information Displays

As urban transit systems continue to expand, cities are seeking sustainable ways to reduce energy consumption while maintaining real-time passenger information services. One effective approach is to deploy green energy-powered PIDs (Passenger Information Displays) at bus stops. This article outlines how to design and implement such a system using solar panels, Lithium Iron Phosphate (LiFePO₄) batteries, and low-power LED technologies.

☀️ Solar Power from Bus Shelter Roofs

Most modern bus stops feature a shelter with a canopy that provides ample surface area and exposure to sunlight. By installing solar panels on the rooftop of the shelter, we can efficiently harvest solar energy during the day. The panels are connected to a charge controller that regulates the voltage and current to safely charge a battery bank.

🔋 LiFePO₄ Battery for Energy Storage

To store the energy generated by solar panels, the system uses LiFePO₄ batteries, known for their high cycle life, thermal stability, and deep discharge capability. These batteries provide reliable energy to the PID system even at night or during cloudy weather.

💡 Low-Power LED Display Design

To minimize power usage, the PID screen is designed using high-brightness, single-color LEDs (amber or white). Compared to full-color displays, these LEDs significantly reduce power consumption while maintaining excellent visibility in outdoor environments.

🧠 Smart Power Management & Remote Control

A smart controller manages dual power input (solar + AC 110–230V), battery charge/discharge, and output to the PID. The controller also connects to a 4G router, enabling remote monitoring and management from a central system via the mobile network.

✅ Benefits

• Off-grid operation using renewable energy

• Lower carbon footprint and energy bills

• Improved sustainability and deployment flexibility

• Reliable information delivery even in power outages

🚏 Conclusion

Implementing solar-powered, low-consumption PIDs at bus stops is a cost-effective and eco-friendly solution for modern cities. With solar panels, LiFePO₄ batteries, and energy-efficient LED displays, public transportation can operate smarter, greener, and more independently than ever.