Acorn Energy, Inc., through its subsidiaries, develops and markets wireless remote monitoring and control systems for various markets in the United States and internationally. It operates through two segments, Power Generation (PG) Monitoring and Cathodic Protection (CP) Monitoring. The PG segment provides wireless remote monitoring and control systems, and services for critical assets, which include stand-by power generators, compressors, pumps, pumpjacks, light towers, turbines, and other industrial equipment; and Internet of Things applications.