Battery Back-Up Systems (Wholesale) is a subdivision of the Electrical Apparatus and Equipment Wiring Supplies, and Construction Materials (Wholesale) industry. This industry involves the wholesale distribution of battery back-up systems, which are used to provide emergency power to critical equipment in the event of a power outage. These systems are commonly used in a variety of settings, including data centers, hospitals, and telecommunications facilities. Battery back-up systems typically consist of a battery bank, a charger, and an inverter. The battery bank stores energy from the grid or from renewable sources, such as solar panels or wind turbines. The charger ensures that the battery is always fully charged and ready to provide power when needed. The inverter converts the DC power stored in the battery into AC power that can be used to power critical equipment. The Battery Back-Up Systems (Wholesale) industry is highly competitive, with a range of companies offering a variety of products and services. Companies in this industry must stay up-to-date with the latest technological advancements in battery technology and power management systems in order to remain competitive.