RING MAIN UNITS (RMUS) High-voltage switching solutions for renewable energy projects. GreenBox provides engineered electrical solutions for high-voltage and renewable energy applications, with configurations developed around project requirements. Discuss Your Project Download Datasheet PRODUCT OVERVIEW Engineered for Project Requirements RMU requirements can vary depending on the project, network and application.GreenBox can work with project requirements to determine the appropriate solution and configuration. Key capabilities High-voltage applications Project-specific configuration Engineering support Request a Quote