This document discusses how big data and cloud technologies can support energy efficiency through real-time analytics. It notes that batch processing on historical data using technologies like Hadoop and Amazon EC2 is useful, but to truly enable energy efficiency companies need to leverage in-memory databases and real-time analytics. This allows analyzing data as it streams in and reacting quickly to energy needs and demands, shrinking the demand/response window and gaining greater efficiency and savings. Trends include pushing computations toward data in real-time to enable previously impossible innovations and solutions that help end users react quickly based on current conditions.