Merging Unit Market

The report "Merging Unit Market By Type (Standalone, Integrated), Voltage (Low, Medium, High), Configuration (With Relay, Without Relay), End User (Utilities, Industrial, Commercial, Data Centers, Renewable Energy, Transportation, Others), Region - Forecast to 2030" The merging unit market is projected to reach USD 367.4 million in 2025 and USD 477.7 million by 2030, registering a CAGR of 5.4% from 2025 to 2030.

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A merging unit (MU) is the main instrument in digital substations that changes the analog signals from the current transformers and voltage transformers into digital sampled values. It uses either IEC 61850-9-2 or IEC 61869-9 standards. Thus, it can make measurements accurate and time-synchronized, and it also sends data to the protection relays, bay control units, and SCADA systems via fiber-optic communication. The merging unit market is growing as utilities and industries are moving from copper-wired secondary systems to digital architectures, which increase reliability and decrease engineering complexity. Standalone MUs provide the means for modular upgrades and retrofits. Meanwhile, integrated MUs facilitate compact designs of new substations. The adoption of MUs is mainly in medium-voltage networks due to the extensive digitalization of distribution substations. However, MUs are also used in high-voltage grids for advanced protection and long-distance reliability. Merging units are the main elements that support the interoperability, efficiency, and future-ready grid automation of digital substations.

Utilities segment is expected to dominate the merging unit market during the forecast period

Utilities are likely to drive the demand for merging units as they lead nationwide efforts to modernize aging grids, improve operational reliability, and comply with industry standards, including IEC 61850. Utilities, as the owner and operator of transmission and distribution infrastructure, require merging units to digitize analog signals, enable process bus communications, and support advanced protection and control schemes in digital substations. High-voltage upgrades, seamless integration of renewables, remote monitoring needs, and regulatory mandates collectively boost adoption among utilities, making them primary buyers in the merging unit market.

Renewable energy segment is anticipated to register the highest CAGR from 2025 to 2030

The renewable energy segment is the fastest-growing in the merging unit market due to the rapid deployment of solar, wind, and distributed energy resources requiring advanced grid integration. Digital substations equipped with merging units enable accurate sampling, protection, and communication for complex renewable installations. Regulatory pushes for green energy and grid modernization fuel the demand for IEC-compliant merging units, allowing real-time control and scalability. This surge in renewables drives accelerated adoption and growth for merging unit suppliers in the segment.?

North America is expected to be the fastest-growing region between 2025 and 2030

North America is growing rapidly in the merging unit market, due to ambitious grid modernization programs, substantial large-scale renewable deployment, and increasing investment in substation automation technologies. Due to a strong focus on digital upgrades, especially in the US and Canada, the IEC 61850-compliant merging units are widely integrated for data quality, operational efficiency, and real-time protection capabilities. The regional effort to expand wind, solar, and energy storage projects increases the need for sophisticated process bus architectures, which consequently augments the demand for merging units. The transition to intelligent substations is powered by the encouragement of federal and state governments, in addition to the regulatory mandates for grid reliability and cybersecurity. The utilities, OEMs, and technology providers’ collaborations are speeding up pilot projects, retrofits, and greenfield deployments. The demand is elevated by the requirement for a decentralized, resilient grid as well as advanced automation.

Some major players in the merging unit market are GE Vernova, Hitachi Energy, Arteche, Schweitzer Engineering Laboratories, Inc., and Ingeteam. Major strategies adopted by these players include acquisitions, product launches, investments, partnerships, and expansions.  

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