Developers can now configure, run, and evaluate standardized communication tests for alternating-current and direct-current charging stations (AC and DC) directly in comframe. Additional test libraries are planned.

A Proven Foundation, Extensively Tested

The previous libraries ran on a different software platform but were already developed entirely by comemso. The implementation in comframe was also developed in-house and builds on the previous CharIN-validated comemso implementation. CharIN (Charging Interface Initiative) is an international industry association that promotes reliable interoperability between electric vehicles and charging stations from different manufacturers.

To verify the implementation, test cases were run repeatedly on two charging stations using both comframe and the previous software platform, and the results were compared. One of these stations was the exact same unit used for the original CharIN validation.

In addition, comemso checked every test case against its own charging station simulation in comframe. Correct and faulty communication sequences were deliberately introduced to verify that both passing behavior (PASS) and deviations from the requirements (FAIL) were correctly identified.

“We have carefully transferred our many years of testing expertise into comframe. A key priority was to compare the results with the proven implementation and specifically check every test case for correct PASS and FAIL detection,” says Kiriakos Athanasas, CEO of comemso.

From Configuration to Test Report

comframe controls comemso’s EVCA (EV Charging Analyzer/Simulator) family of test systems. These systems analyze charging processes and can simulate an electric vehicle or a charging station. In the charging station tests described here, the test system takes the role of the vehicle and checks whether the connected charging station follows the specified communication rules.

The test configuration takes into account which functions the charging station supports and which technical details are required for testing. Standardized PICS and PIXIT information is used for this purpose.

Test selection, execution, and evaluation all take place within the same software. A separate test report can be generated for each executed test case, supporting documentation and repeat testing after software changes.

Existing EVCA systems can also be upgraded with comframe and the corresponding libraries. comemso advises customers on suitable upgrade options.

Built for standards. Designed for people.

comemso electronics GmbH introduces Easy Chester Ultimate, a new generation of mobile test systems for EV charging infrastructure. The system combines functional testing of AC, DC CCS, and CHAdeMO charging stations with charging communication analysis and electrical safety testing on both the grid side and the vehicle-facing interface.

Easy Chester Ultimate brings together testing tasks that previously often required several test instruments, different operating concepts, and separate documentation processes.

An integrated 10.1-inch touchscreen guides users systematically through each test. Measurements, communication sequences, and test results are documented in a shared, configurable pdf test report.

Despite its expanded range of functions, Easy Chester Ultimate weighs only 15.7 kilograms, making it significantly lighter than its predecessor. The mobile system was developed for commissioning, maintenance, repair, and periodic inspection directly at the charging station.

“Standards define what charging infrastructure must deliver. Our customers define how testing should feel. Easy Chester Ultimate brings both together. Built for standards. Designed for people,” says Dr.-Ing. Kiriakos Athanasas, CEO of comemso electronics GmbH.

Three Levels of Testing in One System

A charging station may communicate correctly while still presenting an electrical safety issue. It may be installed correctly but still fail to start or stop a charging session reliably. A sound assessment therefore requires functionality, communication, and electrical safety to be examined together.

Depending on its configuration, Easy Chester Ultimate supports:

• Functional testing of AC, DC CCS, and CHAdeMO charging stations
• Testing of Control Pilot and Proximity Pilot
• Testing of PLC communication, including SLAC
• Analysis of digital charging communication according to DIN 70121, ISO 15118-2, and ISO 15118-3
• Simulation of defined faults on CP, PP, and PE lines
• Verification of the charging station’s response to insulation faults
• Electrical safety testing on the grid side and vehicle-facing interface
• Voltage and current measurements

Depending on the test direction and system configuration, electrical safety testing includes protective conductor resistance, insulation resistance, residual voltage, residual current devices, insulation monitoring, and loop impedance.

The system therefore evaluates charging infrastructure from three perspectives: the grid side, the vehicle-facing interface, and the complete charging process.

Guided Testing and Clear Documentation

Easy Chester Ultimate guides users step by step through the selected test process. Status indicators, measurement values, and instructions clearly show which test is active and how its result has been assessed.

The test process follows four structured steps:

1. Connect the system to the charging station (and the grid side).
2. Select the charging standard and test process.
3. Perform safety, functional, and communication tests.
4. Analyze deviations and document the results.

The systematic user guidance supports repeatable testing and makes results easier to interpret. Measurements and test results are automatically transferred into configurable PDF reports. “Passed” or “Failed” assessments refer to the individual test steps that were performed.

Reports can be sent by email directly from the system. Wireless firmware updates, integrated device checks, and optional remote support further simplify field use.

For Commissioning, Service, and Periodic Inspection

Easy Chester Ultimate supports installation, service, and inspection teams throughout the charging station lifecycle. Typical applications include:

• Initial testing and commissioning of new charging points
• Functional checks following maintenance or repair
• Diagnosis of charging and communication problems
• Verification of electrical protection functions
• Periodic inspections
• Testing following firmware or configuration changes

By combining all three testing levels, the system helps users identify whether a deviation originates from the electrical installation, charging communication, protection functions, or general charging behavior.

International Charging Standards and Flexible Extensions

Depending on its configuration, Easy Chester Ultimate supports AC Type 1 and Type 2, CCS Combo 1 and CCS Combo 2, NACS according to SAE J3400, and CHAdeMO.

Supported standards and communication protocols include IEC 61851-1, DIN 70121, ISO 15118-2, and ISO 15118-3. The relevant interfaces are tested directly within the selected system configuration.

Optional extensions are available for additional applications. A Long Duration Unit enables longer charging cycles and the analysis of time-dependent faults. External DC loads allow for testing with higher charging power over a longer period of time.

Ten Years of Easy Chester

The Easy Chester product family has been on the market since 2016. Since then, it has supported manufacturers, operators, installers, testing organizations, and service technicians worldwide in testing and troubleshooting charging infrastructure.

Easy Chester Ultimate represents the next stage in this development. It combines a significantly expanded testing scope with lower weight, systematic user guidance, and integrated documentation.

Product Information

A product video shows Easy Chester Ultimate and its guided testing process in practical use:

https://www.youtube.com/watch?v=mNd1JJHLuNw

Product demonstrations and system configurations are available from comemso.

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