Rockwill Electric Successfully Completes Factory Acceptance Testing (FAT) for Rwanda’s National Grid Upgrade Project

MOSCOW, June 9, 2026 —— Rockwill Electric today announced that its medium-voltage line automatic voltage regulator (AVR) has successfully completed over three years of field operation and validation by customers in Russia. The equipment maintained stable operation and remains in excellent condition under harsh environments reaching -45°C. This marks a substantial technical breakthrough for Rockwill in the field of power transmission and distribution equipment for ultra-cold regions. According to feedback from a Russian power grid company, since their commissioning in 2022, Rockwill's line automatic voltage regulators have been in continuous operation across multiple substations and lines in Siberia and the Far East for more than three years, enduring several winters where minimum temperatures dropped below -50°C. "The regulator's tap changer operations, voltage regulation accuracy, and control systems showed no signs of low-temperature stalling, insulation failure, or seal aging and leakage. All operating parameters remained normal, far exceeding our expectations for extreme-cold equipment," commented the customer's head of operations and maintenance. On-site Operation Photos of Rockwill RVR Series Voltage Regulators in Extreme Cold Conditions To overcome the extreme challenge of -45°C, Rockwill implemented systematic technical improvements in equipment materials, low-temperature resistant sealing, and specialized regulator structures: Upgrade of Low-Temperature Resistant Materials: Eliminating risks of cold brittleness. Advanced Low-Temperature Sealing System: Ensuring long-term sealing reliability under extreme cold. Optimization of Specialized Regulator Switch Technology. The Technical Director of Rockwill stated: "The 'excellent condition' reported by our Russian customers after more than three years of field operation is the best validation of our technical team's scientific research spirit and practical capabilities. Moving forward, we will continue to deepen our technical innovations to provide global users with even more reliable equipment."

Built on nearly 20 years of technological expertise, the new generation Rockwill medium-voltage automatic circuit recloser comes standard with smartphone connectivity and AI capabilities. It delivers smarter, more efficient, more convenient, and more reliable automatic line protection, monitoring, and control services to power asset owners worldwide. Physical photographs of automatic circuit recloser and Mobile APP field test Rockwill will launch completely free software and professional AI technical services for distribution network automation. Designed for grid engineers, protection engineers, O&M engineers, asset owners, and end users, these tools help analyze and interpret grid data, assist in operations and maintenance, and maximize power supply quality and safety! For more information, please visit:IEE Business

As the global energy transition accelerates and carbon neutrality goals gain momentum, medium-voltage distribution equipment is rapidly evolving towards SF₆-free, eco-friendly, compact, and intelligent solutions. Traditional SF₆ gas faces increasingly stringent environmental regulations due to its high Global Warming Potential (GWP), while conventional air-insulated equipment is limited by lower insulation margins and large footprints. In this context, Rockwill officially introduces its new-generation 24kV Dry Air Ring Main Unit (Pure Air / Dry Air Insulated RMU). Featuring a significantly smaller footprint, lower working pressure, and a completely green insulating medium, it provides a highly competitive SF₆-free solution for the industry. Core Product Features The Rockwill 24kV Dry Air Ring Main Unit uses pure dry air as the sole insulating medium, achieving true zero-carbon footprint. Its key design parameters and advantages are as follows: Insulating Medium: 100% dry pure air, GWP=0. Contains no fluorinated gases or gas mixtures, entirely eliminating environmental risks and handling costs associated with SF₆. Working Pressure: 0.2 MPa, lower than typical industry levels, reducing demands on sealing system design and long-term maintenance. Ultra-Compact Dimensions: Single Module Width: C/F functional unit cabinet width is only 325 mm, enabling flexible configurations. Three-Unit Compact Design Dimensions: Height: 1330 mm × Width: 975 mm × Depth: 780 mm. The overall footprint is significantly smaller compared to similar SF₆-free products, making it ideal for space-constrained installations (e.g., underground substations, urban renewal projects, compact switchrooms). High Performance: Rated voltage 24kV, rated current 630A, rated short-time withstand current 20kA/3s, mechanical endurance ≥10,000 operations, protection rating up to IP67 (gas compartment) and IP54 (cabinet). Smart Integration: Supports integrated primary-secondary intelligent monitoring and control, enabling real-time condition monitoring, rapid operation, and precise protection. Comparative Analysis with ABB SafeRing/SafePlus Air As a fellow SF₆-free dry air-insulated solution, the new Rockwill unit demonstrates clear advantages in installation footprint and working pressure: Technical Parameter Comparison: Rockwill 24kV Dry Air RMU vs ABB SafeRing/SafePlus Air 24kV Parameter Rockwill 24kV Dry Air RMU ABB SafeRing/SafePlus Air 24kV Insulating Medium Dry Pure Air Dry Air Rated Voltage 24 kV 24 kV Rated Current (Busbar) 630 A 630 A Working Pressure 0.2 MPa 0.25 MPa Dimensions (H×W×D) for Typical 3-Unit Configuration 1330 mm × 975 mm × 780 mm 1400 mm × 975 mm × 797 mm Single Module Width (Functional Unit) 325 mm 325 mm (for 12/24 kV functional units) Environmental Profile GWP=0, No fluorinated gases GWP=0   Key Features Compact design, lower working pressure, fully sealed gas compartment, smart monitoring & control Same footprint, interfaces, and operation as previous SF₆ models Key Advantage Insights More Compact Size: Rockwill's design is 70mm lower in height and 17mm less in depth, offering a smaller overall volume while maintaining the same width. This saves valuable space in substations. Lower Operating Pressure: The 0.2 MPa working pressure, compared to 0.25 MPa, reduces structural demands on the gas compartment, potentially enhancing long-term sealing reliability and lowering manufacturing complexity. Equivalent Environmental Performance: Both utilize dry air insulation with a GWP of 0, fully complying with stringent environmental regulations like the EU F-gas Regulation. Summary of Technical Advantages Green & Sustainable, Entirely Fluorine-Free: Uses pure air insulation, eliminating SF₆ or other F-gases across the entire lifecycle—from production and operation to decommissioning—thus solving challenges related to greenhouse gas regulation and handling. Space-Saving Design for Constrained Sites: Leverages optimized electric field design and solid composite insulation to ensure insulation performance while minimizing phase-to-phase and phase-to-ground clearances. Its industry-leading compact footprint is especially suitable for urban core areas, underground substations, and industrial park upgrades. High Reliability, Maintenance-Friendly Design: Fully sealed, welded stainless-steel gas compartment with long-life sealing ensures internal dryness and stability, preventing faults like condensation. The integrated operating mechanism and smart units support condition monitoring, enabling predictive maintenance. Easy Installation & Strong Compatibility: Features a standard modular design with interfaces compatible with mainstream products, supporting rapid deployment and non-stop power supply switching for efficient distribution network upgrades. Typical Application Scenarios Urban Distribution Network Upgrades: Underground substations, capacity expansion in old residential areas. Industrial Parks & Data Centers: Locations with high power supply reliability requirements and limited space. Renewable Energy Plants: Ring main units for PV or wind farm grid connection points. International Grid Projects: Particularly suited for regions with strict environmental regulations and space constraints. Conclusion The launch of the Rockwill 24kV Dry Air Ring Main Unit marks a significant step forward in the compactness and practical engineering of SF₆-free ring main units. While maintaining high performance and reliability, it offers superior space utilization and lifecycle cost benefits through its smaller size and lower operating pressure. As global demands for environmental sustainability and efficiency continue to rise, this product will provide robust support for the safe, green, and efficient operation of distribution networks.

May 11, 2026 — Rockwill Electric announced today that its full range of high-voltage electrical equipment has officially adopted g3 (Green Gas for Grid) eco-friendly insulating gas technology. This initiative marks a pivotal step for the company in replacing sulfur hexafluoride (SF6) and driving the low-carbon transformation of power grids, offering the electric power industry an innovative solution that combines superior environmental performance with reliable insulation capabilities. 99% Carbon Reduction, Stable Operation at -30°C The core of the g3 technology applied by Rockwill Electric lies in using a mixture of C4F7N (C4-fluoronitrile) and carbon dioxide (CO2) to replace traditional SF6, which has a high Global Warming Potential (GWP). This technical solution achieves a breakthrough in environmental performance with a GWP reduction of over 99%, while also being non-ozone-depleting, significantly lowering its lifecycle environmental impact. In terms of performance, Rockwill Electric's g3 equipment demonstrates three core advantages: Equivalent Insulation Performance: Maintains the same insulation level as SF6 equipment, ensuring grid operational reliability is not compromised. Extreme Cold Adaptability: Capable of stable operation at temperatures as low as -30°C, meeting diverse climatic needs across northern and southern regions. Safe and Non-Toxic Characteristics: The gas itself is non-toxic, making it more environmentally friendly and safer for operators, in line with modern power equipment safety standards. SF6-free Dead Tank Circuit Breaker for 72.5 kV Full Range of Eco-Friendly Products for Seamless Replacement Based on g3 technology, Rockwill Electric has developed a product matrix covering core high-voltage transmission scenarios, including: Gas-Insulated Switchgear (GIS) Pass-type Insulated Gas Circuit Breaker (Hybrid-GIS) Dead Tank Circuit Breaker Live Tank Circuit Breaker Maintaining Compatibility While Upgrading Sustainability These products achieve a leap forward in environmental performance while maintaining identical rated parameters and installation dimensions to existing SF6 equipment. Whether for equipment upgrades or new projects, users can directly replace legacy units without modifying existing substation layouts. This seamless compatibility significantly reduces retrofitting costs and project timelines, while allowing clients to benefit from policy incentives and tax advantages associated with carbon emission reductions. Domestic Technology Support: Fortifying Supply Chain Security The application of g3 technology by Rockwill Electric deeply integrates the independent innovation capabilities of the domestic industrial chain. The localization of C4F7N (C4-fluoronitrile), the core component of g3 gas, has achieved milestone breakthroughs: Research & Development: Since 2013, the China Electric Power Research Institute has led joint efforts to develop green and efficient synthesis processes, achieving gas purity levels of 99.9%. Field Validation: In June 2023, the nation's first 550kV eco-friendly gas-insulated metal-enclosed transmission pipeline using C4-fluoronitrile was successfully commissioned in Anhui, validating the maturity of this technology in high-end equipment applications. Rockwill Electric closely follows national strategic directives, transforming localized technologies into mature commercial products. This approach not only ensures supply chain security but also provides customers with cost-competitive green solutions. Intelligent Monitoring for Worry-Free Operation To ensure the long-term stable operation of g3 equipment, Rockwill Electric has developed a dedicated intelligent monitoring system. This system allows for real-time tracking of gas mixture ratios, humidity, and sealing status, promptly detecting and alerting operators to potential issues, thereby providing a dual layer of security for grid operations. Leading the Future of Green Grids "Rockwill Electric is always driven by technological innovation to power green development," stated the company's technical director. "The comprehensive application of g³ technology is not only a proactive response to the climate crisis but also a key practice in building a new type of power system. In the future, we will continue to deepen cooperation with industry partners to promote the standardization and large-scale implementation of eco-friendly gas technologies, contributing Chinese wisdom and solutions to the global energy transition." Choosing Rockwill Electric’s g3 products means choosing a cleaner, safer, and more sustainable energy future. Let us work together to "remove greenhouse gases from the grid" and light up a green world

Recently, Rockwill is pleased to announce the successful completion of the Factory Acceptance Test (FAT) for a significant order of containerized substations destined for a valued customer in France. This milestone marks a crucial step in the delivery of 15 units, specifically engineered to meet rigorous European standards. Project Overview and Technical Specifications The project involves the supply of 15 high-performance containerized substations. These units are designed with robust specifications to ensure reliability and efficiency within the French power distribution network. Key technical parameters include: Product Type: Containerized Substation Voltage Rating: 20/0.4kV Capacity: 2500kVA per unit Quantity: 15 Units Successful Factory Acceptance Test (FAT) The recent FAT was conducted to verify that the equipment meets all agreed-upon design specifications, safety standards, and performance criteria. The successful completion of this schedule confirms that the 15 units are fully compliant with the client's requirements and are ready for shipment. This achievement underscores Rockwill's commitment to quality assurance and its capability to deliver large-scale, customized power solutions to the international market. By adhering to strict testing protocols, Rockwill ensures that every substation operates safely and efficiently upon installation. Strengthening Global Partnerships Delivering a batch of 15 units to France represents a significant vote of confidence in Rockwill’s manufacturing capabilities and technical expertise. We look forward to the successful installation and commissioning of these substations, which will play a vital role in supporting the local infrastructure in France. About Rockwill Rockwill achieved 100% quality control by QMS Digital management and monitoring  system. Enforced quality control reach 100% warranty for power transformer, switchgear, recloser, substations, step voltage regulator, etc.  Aim to whole life care for all end-user!  We are approaching to whole life care level top class manufacturer!

Recently, Rockwill and Tanzania Electric Supply Company Limited (TANESCO) have reached a significant milestone in their collaborative 33kV distribution grid intelligent upgrade project: the 33kV line has been successfully restored to power, all supporting Automatic Voltage Regulators (AVR Step Voltage Regulators) have been energized and put into operation, and all AVR-related work has been successfully completed.   Addressing the pain points of voltage fluctuation and insufficient power supply reliability in Tanzania's local distribution grid, the project deploys Rockwill's customized 33kV AVR and Auto Recloser (AR) solutions. Through precise voltage regulation and intelligent reclosing technology, it comprehensively enhances the voltage stability and fault self-healing capability of the distribution grid. On-site, Rockwill's technical team worked collaboratively with TANESCO's construction personnel to efficiently complete equipment installation, commissioning and grid connection, ensuring stable operation of the AVRs in high-temperature outdoor environments and providing a solid guarantee for local industrial, commercial and residential power consumption.   With all AVRs put into operation, the project is entering its final phase: the installation and commissioning of Auto Reclosers (AR) on the line will be completed tomorrow, further improving the fast fault isolation and self-healing functions of the distribution grid and comprehensively enhancing regional power supply reliability.   The smooth progress of this project not only demonstrates Rockwill's technical strength and overseas project delivery capabilities in the field of medium-voltage distribution grid intelligent transformation, but also deepens the strategic cooperation with TANESCO, creating a replicable benchmark solution for distribution grid upgrades in East Africa and continuously supporting the development of local power infrastructure and economic and social progress.

Recently, Namibia Power Corporation (NamPower) announced the completion of a major power equipment procurement project. A total of 38 units of 2500kVA grounding transformers will be used for the supporting construction of multiple 20MW photovoltaic power plants across the country, providing critical support for the development of local renewable energy. As one of the countries with the richest solar resources in Africa, Namibia is actively promoting its energy transition strategy. According to Namibia's "National Integrated Resource Plan (NIRP 2022)" and the "2024 Energy Ministerial Order," the country plans to vigorously develop photovoltaic power generation projects to reduce dependence on imported electricity and enhance energy self-sufficiency. The 38 grounding transformers procured in this project will serve multiple 20MW independent power producer (IPP) photovoltaic projects. According to technical personnel from Namibia's power department, these 2500kVA grounding transformers are specifically designed for photovoltaic power plants, featuring excellent grounding protection functions and voltage stability, effectively ensuring the safe and stable operation of photovoltaic power plants. The equipment adopts advanced insulation materials and heat dissipation systems, adapting to Namibia's hot and dry climate conditions, ensuring long-term reliable operation in extreme environments. "Grounding transformers are indispensable key equipment for photovoltaic power plants. They not only provide system neutral point grounding but also effectively suppress harmonic interference and improve power quality," stated a Namibian power engineer. After the deployment of this batch of equipment, it will significantly enhance the power supply reliability and grid connection capabilities of photovoltaic power plants. This equipment procurement project is an important component of Namibia's "Renewable Energy Development Plan," with a total investment of approximately 18 million Namibian dollars. Upon implementation, the project is expected to add 760MW of photovoltaic power generation capacity to Namibia, reduce carbon dioxide emissions by approximately 1.5 million tons annually, and create more than 500 local jobs. A relevant official from Namibia's Ministry of Energy stated: "The deployment of these grounding transformers not only provides necessary equipment support for photovoltaic power plant construction but also lays a solid foundation for Namibia's energy diversification strategy. We will continue to advance renewable energy project construction to provide clean and reliable power supply for national economic development and improvement of people's livelihoods." It is reported that this batch of grounding transformers features intelligent monitoring capabilities, enabling remote fault diagnosis and condition monitoring, significantly reducing operation and maintenance costs and fault response time. With the deployment of this equipment, Namibia's renewable energy proportion is expected to increase to over 30%, providing more environmentally friendly and economical power services for local residents and enterprises, while also setting a good example for energy transition in the African region.

Recently, domestic renowned power equipment manufacturer Rockwill successfully completed an important order, delivering 145 three-phase oil-immersed distribution transformers to Pakistani customers. These products, with technical specifications of 33kV/1000kVA/25A, will be widely applied in key projects including Pakistan's urban distribution network renovation, industrial park power supply, and new energy grid connection, providing reliable power supply guarantee for the local area. The delivered transformers adopt Rockwill's latest developed high-efficiency energy-saving technology, with significant improvements in performance and reliability. The products feature 15% reduction in no-load loss and 10% reduction in load loss, significantly decreasing annual operating costs. Meanwhile, environmentally friendly insulating oil compliant with RoHS standards is adopted, and intelligent functions such as temperature monitoring and oil level detection are integrated to support remote operation and maintenance. The transformers have passed rigorous short-circuit withstand capability tests, ensuring safer and more reliable operation. These transformers will primarily serve areas including Pakistan's urban distribution network renovation, industrial park power supply, and new energy grid connection, effectively enhancing local power supply reliability and power quality, while supporting economic development and meeting people's livelihood electricity demands. With Pakistan's rapid economic development and continuously growing power demand, the market demand for distribution transformers continues to expand. Rockwill, as a leading domestic power equipment manufacturer, possesses a complete quality management system and advanced production equipment. The company's products have passed multiple international certifications and are exported to more than 30 countries and regions worldwide. This large-scale delivery not only demonstrates Rockwill's strong production capacity and technical strength but also provides crucial support for Pakistan's power grid construction. According to estimates, these transformers are expected to save approximately 1.5 million kilowatt-hours of electricity annually, reduce maintenance costs by about 30%, with equipment service life reaching over 25 years. Rockwill stated that the company will continue to increase R&D investment, launch more high-performance and intelligent power equipment products, actively expand overseas markets, and contribute to global energy transition.