By investing in the Easy Chester Calimera, CMI is strengthening its capabilities for mobile calibration of AC and DC charging stations directly in the field. As the national metrology authority of the Czech Republic, CMI plays a key role in ensuring measurement accuracy, compliance and trust in calibration- and metrology-related applications.

With the Calimera solution integrated into its service vehicle, CMI can verify charging stations directly where the energy actually flows: at the charging point itself. This supports precise and traceable verification of delivered energy and contributes to accurate billing, regulatory compliance and trust in public charging infrastructure.

From live demonstration to mobile calibration vehicle

The project was implemented in close cooperation between CMI and comemso. In December 2025, the comemso team visited CMI in Prague to demonstrate the Easy Chester Calimera using the comemso demo vehicle. During the visit, additional CMI experts and international partners had the opportunity to experience the system live in operation.

Following the demonstration, CMI provided its own service vehicle, into which comemso professionally integrated the Calimera solution. In February 2026, the fully equipped vehicle was handed over at comemso. The handover also included joint system training before CMI drove the vehicle back to Prague on the same day.

“This project clearly demonstrates the importance of practical and mobile calibration solutions for the further development of charging infrastructure,” says Dipl.-Ing (FH) Anita Athanasas, Chief Commercial Officer (CCO). “We are very pleased that CMI is already actively using the Easy Chester Calimera and that our technology can contribute to reliable measurement technology in the field of e-mobility.”

Mobile calibration under real-world conditions

The Easy Chester Calimera is a mobile in-field calibration system for charging infrastructure. It enables precise and traceable measurements on AC and DC charging stations and is designed for use under real-world conditions. The system supports calibration-compliant testing processes in accordance with ISO/IEC 17025 and is suitable for applications in the field of legal metrology.

Key features include a wide voltage and current range for modern high-power charging applications, high-precision energy measurement for AC and DC charging systems, automated workflows, and support for common charging standards such as CCS1, CCS2, CHAdeMO, NACS and AC Type 1 / Type 2.

For operators, testing organizations and authorities, the correct measurement of charged energy is becoming increasingly important. Only when charging stations measure accurately can end users trust that they are billed for exactly the amount of energy they actually receive.

A strong signal for the market

CMI’s active use of the Easy Chester Calimera underlines the growing demand for reliable, mobile and field-ready calibration solutions for charging infrastructure. As public and commercial charging networks continue to expand, measurement accuracy, traceability and regulatory confidence are becoming increasingly important.

comemso sees the project with CMI as an important example of how national metrology institutes are actively shaping the quality and transparency of e-mobility infrastructure.

With CCTS validation, CharIN confirms that the comemso EVCA provides reliable, reproducible and comparable test results, regardless of the laboratory configuration. This makes an important contribution to ensuring interoperability and quality within the global CharIN ecosystem.

Validation includes verifying system performance and ensuring the correct implementation of relevant test cases, in accordance with the scope defined by CharIN. Supported standards include key norms such as IEC 61851-1, IEC 61851-23 and DIN 70121, as well as ISO 15118-2 and ISO 15118-3. Additionally, the test system covers the official CharIN test cases specified in the CharIN Umbrella Documents for DC EVSE (Basic and Extended).

The documents can be downloaded here:

CharIN Umbrella Document for Charging System Basic DC EVSE (Download via CharIN)

CharIN Umbrella Document for Charging System Extended DC EVSE (Download via CharIN)

„Reliable conformance testing is the foundation for interoperable and future-proof charging infrastructure,” comemso explains. “The CCTS validation by CharIN highlights our dedication to offering manufacturers and testing laboratories around the globe a robust and widely recognised testing system for DC charging systems.”

The official CharIN statement on the CCTS validation of the comemso EVCA can be found on the comemso website and downloaded via the following link:

CharIN Official Statement for comemso electronics GmbH as a CharIN CCTS (Charging Conformance Test System) (Download via comemso)

In addition to compliance test libraries, comemso offers solutions and fully automated functions for advanced interoperability testing. These enable efficient analysis, error localization, and verification directly in development, commissioning, and field service.

Together with its customers, comemso translates standards, test cases, and real-world application scenarios into reliable systems, thereby making a measurable contribution to quality assurance, market interoperability, and the sustainable building of trust in electromobility.

Technical highlights and use cases:

• Comprehensive AC & DC (CCS) tests incl. Fault simulation according to IEC 61851-23 – indispensable for EVSE tests in terms of performance, safety and robustness
• Two 160 kW battery emulators (Gustav Klein) for realistic EV simulation
• EMC Link Integration for EMC Chamber Testing
• Training on the comframe software for intuitive, automated test sequences

With the upgrade, the laboratory is optimally equipped for high-performance EV and charging infrastructure testing: from development to validation to end-of-line testing (EOL). The modular architecture and flexibility of comframe make the system future-proof and scalable – suitable for EVSE tester requirements in laboratory, production and EMC environments.

The customer has been relying  on e-mobility test solutions from comemso  since 2018 and has  now expanded and modernized its setup due to its many years of satisfaction.

Learn more: comemso EV Charging Analyzer (EVCA)

The Easy Chester is a mobile functional test device for AC and DC charging stations that fully simulates the communication of an electric vehicle – without the need for a real vehicle. It supports all relevant communication protocols: DIN 70121, ISO 15118, IEC 61851-1 for CCS and NACS charging standards as well as CHAdeMO up to and including version 2.0.

Typical application scenarios range from initial commissioning and recurring tests as part of quality assurance to maintenance, troubleshooting and technical support or the repair of charging stations. With the Easy Chester, the function, communication and safety behavior of a charging station can be tested easily and safely – wherever it matters.

With the new Easy Chester Gen. 2, comemso now presents a more powerful, even more flexible system with numerous extensions:

• A revised, more intuitive user interface ensures even easier operation.
• In addition to 400 V systems, 800 V charging systems can now also be tested – a crucial step for testing modern high-power chargers.
• The Pro version allows DC load simulation with up to 60 kW.
• Proven features are retained: extensive long-term tests and targeted fault simulations – e.g. communication faults or insulation faults (AC/DC).
• With the optional comISO module (available from Q4/2025), additional VDE-compliant tests can also be carried out.

Three equipment variants – Basic, Extended and Pro – and a modular hardware architecture with interchangeable electronic cassettes enable flexible adaptation to a wide range of requirements. Thanks to software upgrades, functions can be specifically expanded. Intelligent features such as automatic detection of the connected plug type and connected DC loads as well as the new, improved PDF report function complete the system.

The official sales launch of Easy Chester Gen. 2 begins today.

With this further development, comemso is consistently continuing its course of innovation – and remains true to its own claim: First on the market. First on innovation.

Without a structured approach, these tasks can quickly become error-prone, putting your certification, reputation, and even your business at risk. comemso got a solution for you!

We are excited to offer our free "Quick Guide for Inspecting Charging Stations"—a comprehensive, ready-to-use checklist designed to help you perform thorough inspections with ease and confidence.

What You’ll Get with This Checklist:

• Visual Inspection (1.0): Step-by-step guidance to evaluate the physical condition of your charging stations.
• Inspection of the Electrical System (2.0): Ensure the safety and functionality of the electrical systems powering your chargers.
• Repetition of Measurements and Tests (3.0): Procedures aligned with IEC 60364-6 to guarantee compliance with international standards.
  • Electrical Safety Testing (3.1): Ensuring all systems meet required safety standards for optimal performance.
  • Calibration Validity (3.2): Verifying calibration status for stations under calibration law.
• Test Case Failure Simulation: Simulate potential failure scenarios to improve system robustness.
• Step-by-Step Instructions: Clear, actionable steps that make inspections easy to perform.

Why You Need This Checklist:

• Ensure Compliance: Stay in line with industry standards like IEC 60364-6, preventing costly compliance issues.
• Save Time: Avoid confusion and reduce inspection times with a clear, actionable checklist.
• Increase Reliability: Proactively identify issues and ensure your charging stations perform at their best.
• Stay Informed: Keep up with evolving safety regulations and industry practices.

Don’t wait for problems to arise—download your free checklist today and start improving your testing and inspection process.

https://comemso.com/quick-guide-inspecting-evse/

Who Is This Checklist For?

• Service Technicians maintaining and repairing EV charging stations
• Charge Point Operators (CPOs) overseeing the safety and functionality of charging infrastructure
• EVSE Test Engineers ensuring proper testing of charging equipment
• Quality Assurance Professionals ensuring compliance with safety standards

Get started today and streamline your EVSE testing!

For more information about the Easy Chester, please contact:

comemso electronics GmbH
Dipl.-Ing. (FH) Anita Athanasas
Chief Commercial Officer, CCO
Email: sales@comemso.de
Website: www.comemso.de

A New Standard in Calibration Technology

The Easy Chester Calimera is more than just a calibration device – it is an advanced tool engineered for efficiency, accuracy, and mobility. With a DC voltage range of 150 V to 1000 V and a current of up to 500 A, it supports a wide range of charging scenarios, including 400 V and 800 V fast-charging systems.

Unlike traditional solutions, the Easy Chester Calimera utilizes a battery emulation combined with resistive loads for exceptional measurement stability and repeatability, ensuring compliance with international regulations.

Comprehensive Compatibility for Global Standards

The system is fully compatible with the world’s leading EV charging protocols, including:

• CCS (DIN 70121, ISO 15118-2, ISO 15118-3)
• CHAdeMO (Versions 0.9 – 2.0)
• NACS (SAE J3400)
• AC Testing (IEC 61851-1 & SAE J1772, with 1-phase AC (80 A) and 3-phase AC (32 A)).

This broad compatibility ensures seamless integration with current and future charging technologies.

Optimized for Field Operation

The Easy Chester Calimera is built for mobility, making on-site calibration more efficient and accessible:

• Independent power supply – Operates up to 8 hours autonomously with integrated battery and solar options.
• Compact and transportable – Easily mounted in vans or trailers, enabling multi-station calibration in a single day.
• Minimized downtime – Modular design and quick setup reduce service interruptions.

Advanced Software for Maximum Control

Equipped with comframe software, the Easy Chester Calimera provides:

• Real-time voltage and current monitoring
• Customizable test configurations
• Automated diagnostics and event logging
• ISO 9001 & ISO 17025-compliant calibration PDF-reports

These features allow users to optimize testing workflows, ensure compliance, and streamline reporting.

Robust Design for Challenging Conditions

The Easy Chester Calimera is engineered for demanding environments, with:

• Advanced cooling technology for continuous high-performance operation
• IP21 (active) and IP65 (inactive) protection, enabling reliable operation in temperatures from 0°C to 40°C

Shaping the Future of EVSE Calibration

With its precision, mobility, and scalability, the Easy Chester Calimera sets a new benchmark in EVSE calibration technology. It ensures that charging stations meet the highest quality and compliance standards – while also complying with calibration law, contributing to a more reliable and efficient e-mobility infrastructure.

For more information about the Easy Chester Calimera, or to discuss your requirements, please contact:

comemso electronics GmbH
Dipl.-Ing. (FH) Anita Athanasas
Chief Commercial Officer, CCO
Email: sales@comemso.de
Website: www.comemso.de

“Megawatt charging is more than just high power—it requires addressing new sets of challenges, from cooling mechanisms to cable design, and from specialized infrastructure to precise data measurement,” says Dr.-Ing. Kiriakos Athanasas, CEO at comemso. “Our team has worked closely with suppliers and dedicated intensive workshop sessions to master these complexities, ensuring our solution will deliver reliable results under real-world conditions.”

High-Power Compatibility, Future-Focused Architecture

• Multi-Standard Readiness: The system already supports worldwide high-power charging standards (CCS, NACS, CHAdeMO, GB/T DC, and AC) for seamless compatibility.
• Cooled Cable: Engineered for continuous high-power EVSE and EV testing, addressing the critical thermal challenges of megawatt-level charging.
• Scalable Design: With space reserved for the upcoming MCS communication core, the platform is future-proof, ready to adapt as new protocols and requirements emerge.

Meeting the Complexities of Megawatt Charging

When charging rates reach megawatt levels, multiple variables come into play—thermal management, system architectures, safety protocols, and more. Working in partnership with suppliers, comemso has fine-tuned its approach to cooling and cabling for high-current operation. This adaptability provides testing labs and OEMs with flexible solutions that cater to customer-specific requirements and climate chamber applications alike.

Laying the Foundation for What’s Next

This new MCS-ready project marks the start of a broader roadmap toward megawatt-capable charging solutions. By leveraging the insights gained, comemso continues to drive innovations that match the rapidly evolving demands of the e-mobility industry.

“This isn’t just a single project—it’s the groundwork for a new era in EV charging, and we’re excited to enable our customers to ride this wave of innovation,” adds Anita Athanasas, CCO.

Join the Journey to Megawatt Capabilities

As part of its commitment to advancing EV technology, comemso invites industry partners, research institutions, and EV/EVSE manufacturers to explore how its MCS-ready platform can be tailored to individual testing and validation needs.

For more information, or to discuss your requirements, please contact:

comemso electronics GmbH
Dipl.-Ing. (FH) Anita Athanasas
Chief Commercial Officer, CCO
Email: sales@comemso.de
Website: www.comemso.de

"Our aim was to design the essential features in a way that allows both beginners to start testing and analyzing right away, and provides experts with detailed measurement and analysis capabilities," explains Anita Athanasas, CCO of comemso. "With comframe, we have succeeded in creating a solution that allows beginners to use extensive, pre-configured settings while enabling experts to perform analyses down to the bit level of communication."

Improved User Experience Through Graphical Interfaces

• Intuitive configuration cockpits for EV, EVSE, and Man-in-the-Middle tests allow a quick visual understanding of progress, currently for AC and DC-CCS charging.
• Clear visualization of communication and power path sequences simplifies comprehension of complex processes.
• Graphical analysis tools provide immediate in-depth analyses of error cases and other relevant events.
• Enhanced performance by focusing on truly necessary functionalities.
• Customizable user profiles for beginners and experts ensure an optimal user experience.

Comprehensive Range of Functions

• Testing and analysis of EV and EVSE charging interfaces according to IEC 61851-1, DIN 70121, ISO 15118-2/3, and ISO 15118-20.
• Man-in-the-Middle tests and data analysis for comprehensive interoperability examinations.
• Support for the new EVCA-Flex systems as well as older comemso hardware generations.
• comemso CCS protocol stack for all applications and as the basis for upcoming DIN and ISO test libraries.

Optimized Application Architecture

With comframe, a seamless integration of all comemso products is now achieved.

• Simplified installation and execution by eliminating the need for PC software from other providers.
• Cost advantages through the use of comemso licenses for the comframe modules and the corresponding test libraries.

Looking Ahead

Our developers are currently working on Extended and Professional simulations with user-friendly yet highly detailed configuration options for the experienced user. Additionally, we are migrating our extensive compliance test libraries into the comframe software environment,
refined for further user benefits. The test cases and all functionalities will be available via a REST API interface, enabling seamless integration of our tools into existing test environments.

"It is important for us to emphasize that comframe will become THE interface for all our product families—whether for EVCA and Easy Chester in the charging analysis area (including calibration law applications) or for our BZS product family for battery management testing—and also the combination of these product families," adds Athanasas. "Innovative interfaces, intuitive operation, and optimized performance will thus enrich our entire product portfolio."

At the same time, comemso ensures that their systems remain compatible with well-known third-party environments to meet the requirements of existing projects.

Availability

comframe is available immediately! Our technical sales team is happy to answer any questions or provide a live demonstration. Schedule an appointment via our website or contact us directly at sales@comemso.de.

Discover how we can simplify your transition to advanced EV charging solutions.

Key Features

• Signal Quality Measurement: Continuously monitor communication signal standards.
• Protocol Analysis: Detailed insights into AC, CCS, and NACS protocols with automatic conformity checks.
• Comprehensive Simulation: Supports IEC 61851-1, DIN 70121, ISO 15118-2/3/20, and NACS protocols.
• Standards Compliance: CharIN-validated test system for DIN 70122 and ISO 15118-4/5.
• ChargePlayback: Replay recorded communication protocols for in-lab simulation.

The EVCA ComOnly is flexible and future-proof, easily upgradeable to a full-power EVCA Flex system, ensuring precision and compliance for charging protocols.

Application Examples

• Developers and Testers of EVCC: Analyze and simulate communication protocols for electric vehicle communication controllers, ensuring standards compliance and system reliability.
• Developers and Testers of SECC: Test and validate communication protocols for supply equipment communication controllers, enhancing interoperability and meeting industry standards.
• Service Providers / Engineering Companies: Offer advanced testing and simulation services to ensure client systems are compliant and reliable.
• Universities and Research Institutions: Conduct research and development on communication protocols in electromobility, contributing to advancements in EV and EVSE technologies.

Glossary

• EVCA: Electric Vehicle Charging Analyzer/Simulator
• EVCC: Electric Vehicle Communication Controller
• SECC: Supply Equipment Communication Controller
• CCS: Combined Charging System
• NACS: North American Charging Standard
• IEC 61851-1: Standard for electric vehicle conductive charging systems (CCS low-level communication and AC)
• DIN 70121: German standard for DC charging with electric vehicles (CCS high-level communication for DC)
• ISO 15118: Standard for vehicle-to-grid communication interface (CCS high-level communication for AC and DC)
• CharIN: Charging Interface Initiative promoting CCS standard
• CCTS: CharIN CCS Test System

Technical Specifications

Feature /Description
Model Number : 116-2-015 (CCS Core for ComOnly)
                        116-2-016 (CCS Core for ComOnly, with PLC-Sniffer)
                        116-1-011 (CCS ComOnly Case)
Dimensions: 18.6 x 15.8 x 32.6 (Width x Height x Depth in cm)
Weight: ca. 3kg
Connections: Insulated Banana Sockets, CAN SUB-D9, 24V DC power In
Protocol Support: AC, CCS, NACS
Simulation Capabilities: IEC 61851-1, DIN 70121, ISO 15118-2/3/20
Compliance Testing: CharIN-validated, DIN 70122, ISO 15118-4/5
Functions: Signal Quality Measurement, Protocol Analysis, ChargePlayback of recorded/modified protocol behavior

Acknowledgements

"We extend our gratitude to CharIN and the companies involved in the validation team for the CCTS, as well as all the pioneers in the e-mobility sector. Their contributions drive innovation in electromobility, establishing a future founded on quality, safety, and reliability." – Anita Athanasas, co-founder and CCO of comemso electronics GmbH.
comemso EVCA is “CharIN conformance approved” as CCTS.