“DC Lighting is a Key Component of Optimized Microgrid Solutions” Pacific Northwest National Laboratory
DC (Direct Current) LED lighting adds sustainable value to renewable and AC/DC hybrid-powered projects, providing benefits unattainable by traditional AC lighting systems. “Direct-Coupling” DC lighting to DC renewable power sources (solar, battery, wind) optimizes grid resilient lighting reliability, energy cost & efficiency, carbon reduction, and load management strategies. In the third of this series of posts we will further highlight the tangible and impactful benefits of DC lighting.
BENEFIT #9: Lower Installation Costs Decrease Cable and Installation Costs with Class 2 Power Low-voltage LED light fixtures (24DC to 48DC) with a Class 2 power system (up to 100W Output and 56VDC) is Class 2 rated, as defined by the National Electrical Code (NEC). Class 2 systems do not require mechanically protected cable, or conduit, reducing labor time and costs: decrease copper by 60% due to smaller gauge cables, reduce steel by 100%, eliminate labor to install conduit, and subsequently improve building aesthetics by eliminating conduit.
BENEFIT #10: Reduce Risk of Injury & Liability Traditional AC lighting systems are vulnerable to grid failures. Direct-coupling DC LED lighting to battery storage ensures a reliable and consistent lighting source, even during grid outages. This is especially crucial for critical spaces such as hospitals, emergency shelters, and remote areas where grid access is limited.
As mentioned earlier, DC lighting operates at lower voltages compared to its Alternating Current (AC) counterparts. This low-voltage characteristic provides a safer environment in hazardous settings, resulting in reduced electrical hazards and enhanced fire safety. Lower voltage reduces the risk of electrical shock and electrocution. This is crucial in industrial settings where flammable materials may be present. Workers in hazardous environments often come into close contact with lighting fixtures. DC LED lighting’s lower heat generation means that even prolonged contact with the fixtures poses a lower risk of burns or discomfort.
BENEFIT #11: Optimize Electric Load Management & Cost Control A DC lighting grid with solar & battery storage, creating a self-contained energy ecosystem that empowers optimum power load sharing among the renewable DC power sources. The direct-coupling of DC LED lighting to solar PV and battery storage represents a pivotal advancement in energy management and sustainability.
This innovative approach not only optimizes electric load management and enhances lighting reliability but also contributes to carbon reduction and power cost control. By embracing this integration, individuals, businesses, and communities can take significant steps towards a cleaner, more resilient, and cost-effective energy future.
During the day, when solar PV production is at its peak, excess energy can be used to power both lighting and charge the battery storage system. This reduces dependence on the grid and lowers the strain on energy resources
BENEFIT #12: Reduce EMI Interference DC lighting systems generate less electromagnetic interference (EMI) than AC lighting systems, making them suitable in applications where EMI interference could disrupt sensitive electronic equipment or communication systems.
