Choosing the right battery backup unit (BBU) simplifies the design, extends battery life, and reduces costs. Mechanical simulations enhance heat management and increase reliability. Optimized firmware ensures smooth BBU operation. This article describes the system requirements for the BBU of the Open Compute Project Open Rack Version 3 (OCP ORV3). It emphasizes the importance of an efficient and intelligent BBU that can deliver power during power outages. Additionally, it presents the analog, digital, electrical, and mechanical design solutions and their architectures to meet the specifications. Download this whitepaper to learn more about: The OCP ORV3 performance architecture - Design requirements and hardware implementation - Performance data and results - Solutions from Analog Devices