GWH vs DAIO Comparison

ESS Tech Inc is a long-duration energy storage company specializing in iron flow battery technology. It develops and manufactures long-duration energy storage systems based on iron flow battery technology. The company's batteries use earth-abundant materials, including iron, salt, and water, and are designed for high cycle life and recyclability. It operates as a single business operating segment, which includes all activities related to the design, engineering, and manufacturing of the company's long duration energy storage products. The company's revenue is derived from the sale of its energy storage products and from service contracts.

Data I/O Corp is a provider of programming, security deployment, security provisioning, and associated Intellectual Property protection and management solutions used in electronics manufacturing with flash memory, microcontrollers, and flash memory-based intelligent devices as well as secure element devices, authentication devices, and secure microcontrollers. It is engaged in focused on the design, manufacturing and sale of programming systems used by designers and manufacturers of electronic products. It has its geographic presence in the United States, Europe, and Asia and others. The company derives the majority of its revenue from Asia and others.