How Are E Shelf Labels Powered?

E shelf labels (ESLs) have transformed retail operations by enabling instantaneous price updates, streamlining inventory management, and reducing human error. A pivotal factor in their performance is their power supply, which must prioritize efficiency, durability, and adaptability. This article delves into the diverse power mechanisms driving ESLs, highlighting cutting-edge technologies and the innovative features of HIGHLIGHT’s HSM213 model.

Wired Power Systems

One traditional approach to powering ESLs involves wired solutions like powerline communication (PLC) or Power over Ethernet (PoE). PLC systems, such as those integrated into PTL’s e shelf labels, utilize existing electrical wiring to transmit both data and power. This method eliminates the need for separate communication cables, simplifying installation and lowering costs. For instance, PTL labels operate on a 12V-24V power supply with a 30mA current (at 12V), ensuring stable performance across distances of up to 1 kilometer while supporting hundreds of devices on a single network. Similarly, PoE technology, adopted by systems like  cloud-based ESLs, delivers power and data through Ethernet cables, offering seamless integration and consistent reliability in bustling retail environments.

Battery-Driven Efficiency

Battery-powered ESLs remain popular for their flexibility, particularly in spaces where wiring is impractical. Most devices rely on button-cell batteries or rechargeable alternatives, designed to last for years through low-power hardware and energy-efficient protocols. Innovations like Wi-Fi HaLow, which operates in sub-1GHz frequencies, minimize power consumption by incorporating smart sleep modes. This allows ESLs to function on small batteries for extended periods, even in large-scale deployments. Additionally, energy-efficient displays, such as electronic ink (e-ink), further extend battery life by consuming power only during updates.

Wireless and Energy-Harvesting Innovations

Emerging technologies like energy harvesting are redefining ESL power solutions by eliminating batteries entirely. Powercast’s RFID tags, for example, harvest energy from RFID readers using RF-DC conversion, enabling wireless updates for electronic paper displays. This eco-friendly approach reduces maintenance costs and labor associated with battery replacement, making it ideal for retailers requiring frequent price adjustments. These systems can operate at distances up to 10 meters with fixed readers, combining convenience with sustainability.

HIGHLIGHT HSM213: A Power-Conscious Design

HIGHLIGHT’s HSM213 e shelf label sets a benchmark in power efficiency and reliability. The model integrates powerline communication to deliver stable power and data transmission through existing electrical infrastructure, ensuring consistent performance in high-traffic stores. This design not only simplifies installation but also reduces dependency on external batteries. For environments where wired solutions are impractical, the HSM213 incorporates low-power components and energy-saving protocols inspired by Wi-Fi HaLow, optimizing battery life without compromising functionality. The result is a durable, versatile ESL that supports real-time updates while maintaining operational continuity.