Battery Energy Storage System

<p>A Battery Energy Storage System (BESS) is a grid-connected or behind-the-meter installation of battery modules (typically lithium iron phosphate, LFP) that can charge from the grid or on-site generation and discharge to serve loads. In data centres, BESS is used for peak demand shaving, UPS replacement or extension, grid services revenue and — at larger scales — as a primary backup power source reducing reliance on diesel generation.</p><p>BESS capacity is typically measured in MWh (energy) and MW (power). A 10 MW / 20 MWh system can deliver full rated power for two hours. Unlike diesel gensets, BESS responds in milliseconds and produces no local emissions. Battery degradation (typically 20% over 10 years), thermal management, fire suppression and end-of-life recycling are key design and operational considerations.</p>