Built for standards. Designed for people.
EVSE tester, EV tester and BMS tester – used from the first prototype to the installed charging point.
Where in-house test benches and general-purpose instruments stop: comemso simulates the vehicle, the charger or the battery cells, records communication and electrical behaviour on one time base and checks it automatically against IEC 61851 and ISO 15118 – so you find faults before release, not in the field.
WHY NOW
ISO 15118-20 extends communication for bidirectional charging and Plug & Charge. IEC 61851-23:2023 revises DC safety tests. Megawatt charging (MCS) serves trucks, NACS expands in North America, and AFIR sets infrastructure and interoperability requirements in Europe. All of it lands inside the same product cycles.
Every vehicle meets more chargers, more firmware versions and more edge cases than any lab has tested. Teams that test with real vehicles and real stations find faults late, struggle to reproduce them and need evidence of what they fixed. The cost moves from the lab to the field.
Charging behaviour is recorded once, reproduced at will, checked automatically against the applicable standard and documented as evidence. In development, production, commissioning and calibration alike.
That is what EVCA, Easy Chester, the Battery Cell Simulator and comframe are built for. Read how we think about charging tests
Choose your next test scope, in the lab or at the charging point.
Simulate the vehicle. Test the charging station.
EVCA simulates the vehicle, provokes supported faults you define, and comframe checks the station's response against IEC 61851 and ISO 15118 automatically.
Test scope: configured interfaces, supported faults, released standard edition and test library determine coverage.
CharIN CCTS validatedBasic and Extended DC EVSE test profiles in the validated system configuration.View the validation scope ↗
Simulate the cells. Validate your BMS.
The Battery Cell Simulator sets configured cell and sensor states. From 24 to hundreds of channels, up to high-voltage HiL.
Test scope: configured interfaces, supported faults, released standard edition and test library determine coverage.
From 24 cells to two systems with 132 cell channels each. A BESS project expands its BMS testing capacity. Customer project ↗
BMS whitepaper · English ↗
Simulate the charging station. Test the vehicle.
EVCA simulates station behaviour, timing and supported faults so your EVCC meets the edge cases before customers do.
Test scope: configured interfaces, supported faults, released standard edition and test library determine coverage.
Guided test selection.Original interface before the test starts.
Commissioning · AC/DC installation tester
Easy Chester Ultimate guides AC/DC commissioning, periodic inspection and service, documenting electrical protective measures on the grid and EV sides and charging function.
EVSE checklist · English ↗Further development of the Mini-Charger-Tester.
EVSE manufacturers
Help your customers charge reliably by testing vehicle and firmware variants with EVCA ComOnly, Flex and suitable test libraries. Use comframe to identify and reproduce interoperability faults before delivery and verify the correction. Easy Chester EOL supports repeatable production tests.
Validated CharIN CCTS test profiles and the customer precharge correction show practical applications.
Request a development demoLabs and certification teams
Configure reproducible charging tests for changing devices and standards with EVCA Flex or Multi Mobile. comframe combines communication, measurements and analysis into traceable evidence for your reports. Suitable calibration completes your laboratory workflow.
Read about two 160 kW test setups in Thailand and the Czech Metrology Institute.
Discuss your laboratory setupOEM and Tier 1. EV, EVCC and BMS
Use EVCA to test vehicle charging across different station profiles. The Battery Cell Simulator provides cell and sensor states without putting real battery cells at risk. With comframe, your team can analyse edge cases and verify corrections under repeatable conditions.
See how a BESS project expanded from 24 to two systems with 132 cell channels each. Explore the Aalborg University reference.
Request a validation demoCPO, installers and service teams
Use Easy Chester Micro for commissioning and periodic inspection of AC charging points, and Ultimate for AC/DC testing and service. Calimera adds mobile calibration. Document electrical safety, charging function and energy measurements with the system that fits your task.
See PTB evidence for Calimera and the Czech Metrology Institute customer story.
15-minute Ultimate demo“Thanks to the use of your equipment, we have achieved excellent results in our validation and certification process. Their quality and performance have exceeded our expectations.”
comemso supports customers in over 52 countries. Published customer references include FlooxChargers · JOJU Solar · Aalborg University · Czech Metrology Institute
Read the published customer testimonials“Outstanding technical knowledge of comemso and customer application. High product quality and suitable for research.”
Prof. Dr. Remus Teodorescu, Aalborg University
EVCA and comframe · Automated standards analysis
EVCA and comframe analyse charging against configured standard requirements, flag supported deviations and help you plan targeted follow-up tests.
Precharge
A specialist’s comframe analysis of an EVCA recording helped the customer adjust EVSE control parameters. Retesting confirmed the correction for that charging pair.
Use Professional Simulation to vary timing, parameters and supported faults in your next test.
EVCA Charge Playback · From the field to the lab
Capture communication, timing and available measurements.
Determine the usable scope for EV or EVSE simulation.
Repeat supported behaviour in the lab.
Repeat supported charging sequences in the lab using recorded partner behaviour, without the original charging partner.
Discover Charge Playbackcomframe already supports import and analysis.
comframe
Use approved configurations for follow-up tests, recording analysis and integration. We align extensions with your existing system.
Explore integration and extensions For supported EVCA and Calimera configurations; optional control of supported BCS systems.Specialised test technology
Develop MCS, test production units, service AC charging points or investigate EMC.
MCS · Megawatt Charging
Test communication, signals and interoperability during megawatt charging system development.
Explore MCS testing
Production · End-of-Line
Integrate repeatable manufacturing tests and assign results to the tested units.
Explore production testing
AC installation tester NEW
Commission and periodically inspect AC charging stations with a compact system for electrical safety and charging function tests.
Discover Micro
EMC · Vehicle and charging station
Test charging communication under EMC exposure with optical transmission across the chamber boundary.
Explore EMC testing
Mobile calibration · Easy Chester Calimera
Compare installed AC/DC energy meters with a traceable reference, controlled load and defined operating points.
EVSE calibration
PTB certified · CalimeraProduct-specific evidence. The certification scope is authoritative.View the certification ↗Match your device, interfaces and test depth to a suitable test system.
Go to the product finder
The people behind your test technology
Use comemso hardware, software and application expertise, from selection and commissioning to training, support, calibration and maintenance.
WHAT DRIVES US
In 2009, two engineers left a vehicle manufacturer with a test task the established suppliers called too specialised. Then the financial crisis cancelled the reference project. We built prototypes anyway and talked to anyone who would listen. A year later a customer asked for an e-mobility test bench.
We are still owner-led and investor-free. We still sit in standards working groups, because you cannot test against a standard you have not understood. And we still build hardware, software and manufacturing under one roof in Ostfildern. So that the people who answer your support call can work directly with the people who designed the system.
Built for standards. Designed for people. That is the order in which we work.
Anita Athanasas and Kiriakos Athanasas founded comemso and built it into a global market leader. Their son Manuel Athanasas represents the next generation.
We never stop developing and innovating. Passion, pace and engineering expertise drive us to keep pushing testing technology forward.
Our company storyKnowledge and tools
Plan tests with guidance on temperature, simulation and wiring.
Get the whitepaper
Prepare commissioning and field tests with the EVSE checklist.
Get the checklistEstimate downtime and service costs from your own assumptions.
Open the Uptime CalculatorA customer in the USA uses Professional EVSE Simulation to vary messages and timing, then analyse how the vehicle responds.
An AC End-of-Line system combines EVCA, a bidirectional load and energy measurement with automated test sequences and reports.
A truck and bus manufacturer integrates a two-rack BMS test bench with 204 simulated cells into its existing CANoe environment.
Describe your device, interfaces and objectives to define a suitable test setup.
