Acorn Energy, Inc., through its subsidiaries, provides technology driven solutions for energy infrastructure asset management worldwide. It operates through three segments: Energy & Security Sonar Solutions, Smart Grid Distribution Automation, and Machine-to-Machine Critical Asset Monitoring & Control. The Energy & Security Sonar Solutions segment provides sonar and acoustic related solutions for energy, defense, and commercial markets with a focus on underwater site security for strategic energy installations and other advanced acoustic systems. It also develops and produces real-time embedded hardware and software products. The Smart Grid Distribution Automation segment develops, markets, and sells remote monitoring and control systems to electric utilities and industrial facilities, which are used in various utility applications, including outage management, power quality monitoring, system planning, trouble shooting and proactive maintenance, and condition monitoring; and provides transmission and distribution network operators with the intelligence to conduct grid operations. The Machine-to-Machine Critical Asset Monitoring & Control segment develops and markets machine-to-machine wireless remote monitoring and control systems and services for critical assets, as well as Internet of Things applications and corrosion protection in the pipeline industry. Acorn Energy, Inc. was founded in 1986 and is based in Wilmington, Delaware.