The Rack-Mounted Lithium Battery Energy Storage System is a modular and scalable solution designed for efficient energy storage and management. Utilizing advanced lithium-ion technology, typically LiFePO4 for superior safety and longevity, it seamlessly integrates with solar inverters to store excess solar energy for use during peak demand periods, at night, or during grid outages. Its standardized rack-mounted design allows for easy installation and expansion within server cabinets, saving space and simplifying system scaling. Equipped with a sophisticated Battery Management System (BMS), it ensures optimal performance, safety, and cycle life. This system is ideal for residential, commercial, and industrial applications seeking energy independence and cost savings.