comemso
Find the right system
Talk to application engineering
Start with the decisionApplications
Vehicle and charging station
EV TestingVehicle, EVCC and charging-release validation.EVSE TestingCharging-station development through field operation.InteroperabilityReal EV and EVSE in one synchronized test record.
Battery and advanced charging
BMS TestingCells, sensors, balancing and controlled faults.BMS + EVCC + OBCValidate the interaction of battery, charging controller and on-board charger.MCS TestingCommunication, signals, cooling and megawatt power.EV Charging EMCKeep charging communication observable under EMC stress.
Production and field
EVSE End-of-LineRepeatable acceptance and unit-level results.Commissioning & Field ServiceCommission, diagnose and verify installed chargers.Calibration & MetrologyTraceable energy verification at the charging point.
Start with the decisionProducts & PlatformsFind the right system
EVCA
EVCA PlatformCommunication, interoperability, high-power, MCS and EMC paths.EVCA ComOnlyFocused charging communication testing.EVCA Multi MobilePortable laboratory and field analysis.EVCA InteropAnalyse interoperability between a real EV and EVSE.EVCA FlexModular high-power testing and controlled faults.EVCA MCSMegawatt charging communication, low-level signals and system testing.
Easy Chester
Easy Chester PlatformEVSE production, commissioning, service and calibration.Easy Chester MicroAC EVSE installation testerEasy Chester UltimateAC and DC EVSE installation testerEasy Chester CalimeraAC and DC EVSE calibration systemEasy Chester EOL / EOL HPCEVSE end-of-line production tester
Battery, software and EMC
Battery Cell SimulatorBMS testing from compact bench to high-voltage HiL.comframeConfiguration, synchronized analysis and automation.EMC LinkOptical charging communication through the chamber boundary.
Start with the decisionSoftware Capabilities
Understand and challenge
Automated Standards AnalysisMeasured behaviour, normative context and highlighted deviations.Professional SimulationConfigure nominal, boundary and non-conform behaviour.Manipulating GatewayTest a live correction hypothesis between real partners.
Reproduce and automate
Charge PlaybackReproduce the charging partner for the DUT.Charge Cycle AutomationTurn saved configurations into repeatable campaigns.Conformance Test LibrariesVersioned executable standards-based test logic.
Software and integration
Capabilities HubConnect the capability model across EV, EVSE and BMS testing.EVCA Capability HubExplore the detailed EV charging capability stack.comframeThe shared test-intelligence environment.Integration & APIsREST, Python, CI/CD and laboratory orchestration.Protocol & Domain ModulesSelect released domain depth.
Start with the decisionStandards & Knowledge
Standards and test logic
Charging, Safety & EMCCharging behaviour, field safety, editions and test boundaries.Conformance Test LibrariesReleased executable test logic, verdicts and evidence.AFIR for EV ChargingRegulation, responsibility and verifiable evidence.
Methods and terminology
Knowledge CenterTechnical explanations, methods and application guidance.GlossaryStable charging and BMS test terminology.EVSE Calibration MethodsCompare controlled real load and reference measurement.Battery Cell SimulationCells, balancing, faults, precision and BMS HiL.
Documents and tools
Resources LibraryCurrent brochures, webinars, guides and checklists.Charger Uptime CalculatorEstimate downtime and field-service impact.EVSE Inspection GuidePractical commissioning and inspection workflow.BMS testing whitepaperTemperature, environment, simulation and test wiring.Technical newsletterChoose product updates and events relevant to your tests.
Start with the decisionCompany
Company
About comemsoEngineering purpose, history and operating companies.Development & manufacturingShort paths from development to system testingQuality & CertificationsManagement systems, validation and calibration evidence.Customer ProofNamed stories, endorsements and published configurations.SustainabilityEnvironmental management and measured progress.
People and network
Customer Care TeamDelivery, commissioning, training and support.Sales PartnersRegional commercial and service access.CareersWork on deep e-mobility testing.
Updates and contact
News & EventsProjects, releases, webinars and company updates.Request a technical demoDiscuss your test task with the comemso team.ContactSales, support and locations in one place.Legal documentsImprint, privacy, GTC, EULA and WEEE.
Made in Germany

EV Charging Testers & BMS Testers

Test a real charging station with a simulated vehicle. Reproduce charging behaviour and investigate unexpected responses.

Explore EVSE Testing →
Charging station connected to a simulated vehicle

For charging-station developers and manufacturers

Your charging station evolves. Your test bench needs to keep up.

Combine automated analysis, targeted simulation and electrical fault tests. Evaluate the software, test depth and engineering support with your own charging station.

comframe: selection and configuration of ISO 15118-5 SECC test cases.

Understand charging behaviour. Test it deliberately.

  • Automated analysisCompare measurements with configured expectations. Highlight deviations.
  • Professional SimulationClearly configure supported message values, timing and sequences.
  • SECC TestLibs in comframeISO 15118-4/-5: available now. Run tests and document results.

Share workspaces with colleagues. Keep live and logging controls within reach.

Explore comframe →
Two comemso employees working with an EVSE test setup in the laboratory.

Create critical faults. Examine the EVSE response.

Investigate how your charging station reacts to deliberately introduced communication and electrical faults. Match the fault cases and operating range to your test setup.

Demonstrated on a customer’s DUT

Full test scope for IEC 61851-23 Annex CC.7.5 test cases in the matching system configuration.

Explore electrical test depth →
A comemso employee in front of the company building.

New requirements. Short paths to implementation.

Development, electronics manufacturing, assembly, wiring and system testing work together at comemso. Requirements and feedback can be discussed directly at the system.

See the capabilities at our site

Our own manufacturing and test facilities connect development with implementation.

Meet the people. Explore the facilities. →

From a customer decision: EVCA Multi Mobile, EVCA Flex with IEC 61851-23 and EVCA MCS. Usability, demonstrated test depth and confidence in the partner were decisive.

Available functions and test scope depend on the hardware, software release and agreed configuration. Together, we define a demonstration for your test task.

Discuss your test task and demonstrationExplore EVSE testing →

For commissioning, maintenance and service

Does your charging station charge? Good. Now test it.

A successful charging session alone does not show how a station responds to faults. Test specific functions and keep a record of the results.

  • Test function
  • Investigate protective functions
  • Document results
Explore the test workflowCompare Micro and Ultimate →

Micro: AC. Ultimate: AC/DC, depending on configuration.

Easy Chester Ultimate
Easy Chester UltimateDone means tested.
Battery Cell Simulator in use at comemso.

For BMS developers

Defined cell states. Repeatable BMS tests.

Set cell voltages and sensor signals. Investigate normal operation, boundary conditions and fault responses of your BMS.

In practice: BESS development

From 24 simulated cells to two systems with 132 channels each.

Read the customer story →
Find your BMS test setup

More test tasks. Matching solutions.

Calibrate at the charging point

Check the energy measurement of AC and DC charging stations on site with Calimera.

Explore Calimera →

Extend your laboratory’s test capabilities

Configure systems for conformance testing, electrical tests and charging communication during EMC investigations.

Explore EMC testing →

Reproduce vehicle charging behaviour

Test vehicles and charging controllers with defined EVSE simulations and targeted test cases.

Explore EV testing →

Customer success stories

From a testing challenge to usable evidence.

EVCA field analysis

Charging diagnosis

The timing looked right. The voltage response did not.

Synchronized communication and electrical measurements help investigate the real EV–EVSE interaction.

Read the customer story →
Engineers working with a Battery Cell Simulator

BMS validation

A shared BMS testing platform for two teams.

See how a battery energy storage project connects controller testing and the teams working on it.

Read the customer story →
Czech Metrology Institute with the mobile calibration system

Field calibration

CMI brings charging-station calibration into the field.

The Czech Metrology Institute uses Easy Chester Calimera in a service vehicle for traceable AC and DC charging-station verification.

Read the customer story →

All customer success stories →

System of the Month

Explore delivered test systems and the engineering tasks behind them.

Explore System of the Month

Developed, manufactured and tested at comemso

Short paths for new test tasks.

E-mobility demands innovation and speed. That is why development, manufacturing, assembly, wiring and system testing work closely together at our site.

Direct feedback at the system. Our own manufacturing and test facilities.

Meet the people behind your test system
Two comemso colleagues working on an open electronic test system.

Frequently asked questions

Find the right starting point for your test.

Should I start with an application or a product?

Start with an application when you need to define the test scope. Compare products when the DUT, charging role and required interfaces are already clear.

Explore testing applications · Compare product families

Which system tests charging communication?

EVCA ComOnly tests EVCC or SECC controllers against a simulated communication partner. Other EVCA configurations add real-pair analysis, mobile testing or the electrical scope needed for a complete system test.

Explore EVCA ComOnly · Review the EVCA platform

How does a Battery Cell Simulator support BMS testing?

It supplies controlled cell voltages and sensor signals to a real BMS. Engineers can repeat nominal, boundary and configured fault conditions and check the controller response.

Explore the Battery Cell Simulator

Can I integrate a system into our laboratory automation?

Supported interfaces depend on the product, software release and configuration. Define the required commands, measurements, test results and equipment ownership before selecting the integration scope.

Review integration and APIs

Can I test MCS or EVCC/SECC controllers?

Start with MCS testing for megawatt charging or EVCA ComOnly for controller communication. The required interfaces, protocol editions and electrical scope determine the system configuration.

Technical updates from comemso

Stay informed about the testing topics that matter to you.

Product and software updates, practical testing insights, and invitations to comemso events. Choose your interests before you subscribe.

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A customer support representative wearing a headset at her desk.

Tell us what you need to test.

Describe your test task and share your contact details so our team can respond. Add technical detail when you have it.

Talk to application engineeringConfigure your test system