ACEM GreenCore Series
ArmCoil launched the GreenCore Series in 2026 following extensive research and development to meet the evolving demands of renewable energy and energy storage infrastructure across Africa.
The GreenCore Series is purpose-built for solar PV, battery energy storage systems (BESS) and grid-connected renewable projects. Drawing on ArmCoil’s proven transformer engineering expertise, GreenCore combines efficiency, reliability and sustainability in a locally engineered solution.
- Design, Manufacturing & Local Expertise -
All GreenCore products are proudly designed and manufactured in South Africa at ArmCoil’s Roodepoort facility. Engineering, fabrication, assembly and testing are conducted in-house, ensuring full quality control, compliance with international standards, and consistent product performance.
The GreenCore Series is developed to integrate seamlessly into renewable energy environments while supporting project-specific technical and operational requirements.
- Renewable-Focused Engineering -
Renewable energy systems introduce variable loading, harmonic distortion and demanding thermal conditions.
The GreenCore Series has been specifically engineered to operate reliably under these conditions, delivering stable performance and long service life.
Key engineering considerations include:
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Optimised low-loss transformer designs
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Thermal performance suitable for cyclic and variable renewable loading
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Compatibility with inverter-based generation systems
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Robust construction for harsh operating environments
GreenCore Product Offers
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GreenCore 3400 Series
Rated Power:3.4 MVA
Voltage
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LV Input: 690 V
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MV Output: 6.6 kV – 36 kV
Application
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Small to mid-scale solar PV plant
Key Features
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Compact containerized design
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ONAN oil-immersed transformer
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Factory prewired and pretested
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Plug-and-play installation
GreenCore 6800 Series
Rated Power:6.8 MVA
Voltage
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LV Input: 690 V
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MV Output: 6.6 kV – 36 kV
Application
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Utility-scale solar PV projects
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Medium to large BESS installations
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Grid-connected renewable plants
Key Features
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Modular containerised substation
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Designed for variable renewable loading
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Enhanced thermal performance
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Integrated MV and LV protection
GreenCore 9000 Series
Rated Power:9MVA
Voltage
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LV Input: 690 V
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MV Output: 6.6 kV – 36 kV
Application
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Large-scale solar PV power plants
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High-capacity energy storage system
Key Features
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High-capacity containerized solution
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Optimized low-loss transformer design
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Robust construction for harsh environments
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Suitable for continuous and cyclic loading
Common Technical Characteristics (All Models)
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Frequency: 50 Hz / 60 Hz
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Cooling: ONAN (ONAF optional on request)
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Transformer Type: Oil-immersed, copper windings
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Insulation Fluid: Mineral oil (ester oil optional)
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Protection Degree: IP54 (MV & LV rooms)
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Standards: IEC 60076, IEC 62271, IEC 61439, SANS standards
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Monitoring & Communication: Available on request
Optional Add-Ons (Across the Range)
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Smart transformer monitoring (OWTI / Modbus)
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Remote monitoring and SCADA integration
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MV surge arresters
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Custom voltage, rating or environmental configurations
Quality, Testing & Compliance
Each GreenCore unit undergoes comprehensive testing prior to delivery, including routine testing and factory acceptance testing where required.
ArmCoil operates in accordance with recognized quality, environmental and occupational health and safety management systems, ensuring every GreenCore product meets stringent performance and safety standards.
Support & Lifecycle Services
ArmCoil provides full lifecycle support for all GreenCore installations, including:
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Technical consultation and design assistance
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Factory acceptance testing (FAT)
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Installation and commissioning support
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Preventative maintenance, refurbishment and upgrades
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Ongoing after-sales and technical support
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