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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, MCS and EMC
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, commissioning and calibration
EVSE End-of-LineRepeatable acceptance and unit-level results.Commissioning & Field ServiceCommission, diagnose and verify installed chargers with an EV charger tester.Calibration & MetrologyTraceable energy verification at the charging point.
Products
Start with the decisionProducts & PlatformsProduct Finder
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 MicroWallbox tester for AC chargersEasy Chester UltimateDC fast charger tester (AC/DC)Easy 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.SmartCal calibration (accessory)Automated calibration and adjustment of the Battery Cell Simulator.EMC LinkOptical charging communication through the chamber boundary.
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Start with the decisionSoftware Capabilities
comframe and integration
comframeThe test software for every comemso system.Integration & APIsREST, Python, CI/CD and laboratory orchestration.Protocol & Domain ModulesSelect released domain depth.Capabilities HubConnect the capability model across EV, EVSE and BMS testing.EVCA Capability HubExplore the detailed EV charging capability stack.
Analyse and test
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.
Knowledge
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.NACS (SAE J3400)Charging communication tests for the North American Charging Standard.UL standards & EVSE field safetyUL requirements and electrical safety checks at installed charge points.
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.Testing a wallboxProcedure, standards, limits and test report for electricians.ISO 15118 explainedParts, -2 vs -20, Plug & Charge and AFIR dates.Battery Cell SimulationCells, balancing, faults, precision and BMS HiL.
Documents and tools
Resources LibraryCurrent brochures, webinars, guides and checklists.BMS testing whitepaperTemperature, environment, simulation and test wiring.EVSE Inspection GuidePractical commissioning and inspection workflow.Charger Uptime CalculatorEstimate downtime and field-service impact.Technical newsletterChoose product updates and events relevant to your tests.
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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.
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Customer Care TeamDelivery, commissioning, training and support.Sales PartnersRegional commercial and service access.CareersWork on deep e-mobility testing.
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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.
Engineer testing a charging station with comemso EV simulation and high-power laboratory equipment

EVSE testing

Know how your charger behaves before a vehicle shows you.

Every firmware update can break a charging session that worked yesterday. EVCA simulates the vehicle and repeats the same sessions after each update. You see how the charger responds and what changed – without waiting for field reports.1

CharIN CCTS validated: Basic and Extended DC EVSE test profiles.

Request a 15-minute demo Find your test system
Development and conformanceProtocol, signals, power and difficult behaviour under control
Production and traceabilityTransfer requirements into repeatable line workflows
Commissioning and serviceEasy Chester verifies installation, safety, function and repairs
Real-pair interoperabilityInterop investigates one specific EV–EVSE pair
In 30 seconds
What for
Charger developers who ship firmware updates.
What it does
EVCA simulates the vehicle and repeats the same charging sessions after every update; CharIN CCTS validated for the Basic and Extended DC EVSE test profiles.
Not for
Replacing formal certification – the test results prepare it.

A charger that fails with one vehicle model after an update turns a release into a field campaign.

EVSE testing: controller, complete charging station and real EV–EVSE pair

We define vehicle behaviour, electrical fault cases and reports for the next project. Then check how the test setup can support new charging functions and higher power, and select the system configuration.

Seeing both partners on one timeline shows where a session breaks. EVCA then simulates the partner, so you can confirm the cause under controlled conditions.

Three EVSE test setups: DUT, charging partner and test task
Real device under testCharging partnerTest task and system
Charging controller (SECC)Simulated EV communication at the controller interface.Check messages, states and timing with EVCA ComOnly and the configured Core. Controller communication testing alone does not verify a complete power path.
Complete charging station (EVSE)Simulated EV, with the required power and load hardware.Correlate charging requests, signals and electrical response with EVCA Flex and configured Test Libraries. Source, load, fault and operating limits belong to the selected setup.
Real EV–EVSE pairReal vehicle connected to the real charging station.Investigate an observed interoperability issue with EVCA Interop. Communication and charging measurements share one timeline; passive observation does not replace controlled partner simulation.
EVSE test setup: charging-station outputs connected through R-ISO Check, EV Charging Analyzer and Connector Box to a DC load.
Example DC EVSE test setup. The EV Charging Analyzer simulates the vehicle and records the charging station’s response.

DC EVSE test example: response to a lower EV current request

Stimulus: During a controlled DC charging test, the EV simulation requests a lower charging current. The selected voltage and other test conditions stay constant within the operating limits.

Expected response and evaluation: Compare the real charging station’s reported response and measured current with the reduction, ramp and timing the test case requires. comframe aligns the EV request, EVSE messages and electrical measurements. Acceptance criteria come from the applicable requirements and test scope, defined before the run.

This is a test objective, not a reported measurement result.

Charging-process analysis · AC/DC commissioning and field service with Easy Chester Ultimate; AC installation testing with Easy Chester Micro

Production checksCommissioning and serviceCalibration and metrology

Anonymised project example · EVSE manufacturer

How an EVSE manufacturer chose three test systems

For an expansion of its test equipment, an EVSE manufacturer selected EVCA Multi Mobile, EVCA Flex with IEC 61851-23 test capability and EVCA MCS. According to comemso’s project account, the software workflow, demonstrated electrical test depth and confidence in the engineering partner drove the decision.

Original comframe view · EVCA · ISO 15118-5 SECC TestLib
  1. Test requirement: selected case, PICS and PIXIT.
  2. Device state: live CP values in the status bar.
  3. Result workflow: Test Procedure; no verdict is visible in this capture.
Original comframe view · EVCA · ISO 15118-5 SECC TestLib
Software workflow and analysis

comframe combines automated analysis and Professional Simulation: compare measurements with configured expectations, then vary supported message values, timing and sequences. ISO 15118-4/-5 SECC TestLibs are released in comframe; their applicable cases depend on the software package and DUT.

Explore the comframe application workflow
Two engineers working with an EVSE test setup in the laboratory
Electrical test depth on a customer’s charger

comemso demonstrated the full IEC 61851-23 Annex CC.7.5 test scope on a customer’s charging station in the matching Flex configuration. The demonstration used the existing IEC TestLib application software. Its port to comframe is not yet released.

Review the Flex test configuration
A comemso employee beside an EVSE test system
The people and facilities behind the system

During the site visit, the customer saw software development, electronics manufacturing, assembly, wiring and system testing. The project account describes how this strengthened its confidence in comemso as an engineering partner.

Explore development, manufacturing and testing

Source: comemso’s anonymised project account of the system selection. Images illustrate the software and test environment.

Criteria for assessing your own test bench

Agree your DUT, standard edition, test cases and operating points. For electrical IEC testing, identify the released TestLib, required IEC rack, external load, oscilloscope and protection concept. We define integration responsibilities, acceptance criteria, report scope and training needs for your configuration.

Discuss your EVSE configuration and demonstration
Proven in EVSE development and certification

“Currently the best and most complete vehicle simulator / sniffer / man in the middle we have used.”

Montagna GiampieroHead of Digital Lab, KEMA Labs

EU regulation and market access

AFIR connects communication readiness, interoperability and operational results.

AFIR is broader than one protocol test. For EVSE development, the transition means continued ISO 15118-2 support and growing ISO 15118-20 readiness. Deployment also needs separate attention to payment, pricing, backend connectivity and data obligations.

Communication readiness

Current ISO 15118-2 behaviour is verified, and SECC hardware and software are prepared for the required ISO 15118-20 scope.

Coexistence and Plug & Charge

Public charging infrastructure is planned so legacy and newer vehicle implementations remain supportable.

Lifecycle results

Conformance, interoperability, power, fault reactions, commissioning and field verification work together – readiness is more than one pass/fail test.

Scope boundary

Payment certification, legal assessment, pricing transparency, backend connectivity and data obligations remain separate responsibilities.

SECC Test LibrariesProtocol conformance and defined verdicts EVCA InteropReal implementation interoperability EVCA FlexSignals, power, faults and robustness Easy Chester UltimateCommissioning and field verification
Open the dedicated AFIR knowledge page

EVCA Interop and Charge Playback

Repeat real vehicle behaviour in the EVSE laboratory test

EVCA Interop captures a real EV-to-EVSE interaction, including issues specific to one vehicle implementation. Charge Playback uses supported EV-side PLC (power line communication) content and timing to act as a physical charging partner for the EVSE under test.

  1. Real charging session

    Connect the charging station to the vehicle involved in the reported interoperability case and reproduce the relevant site condition.

  2. Record

    Capture the EV-side PLC content, timing and related charging measurements from the real session.

  3. Extract

    Select the recorded behaviour supported by the EV simulation configuration and retain the source session.

  4. Active simulation

    Apply the recorded vehicle behaviour to the EVSE through its physical charging interface.

  5. Repeat and modify

    Repeat the charging-station test, changing one vehicle-side condition at a time. Reuse the observed EVSE response in automated regression tests.

Interop analyses the real charging pair

EVCA Interop investigates the charging station with a real vehicle. A configured EVCA Multi Mobile system adds broader portable measurement and vehicle-side charging-partner simulation.

Explore EVCA Interop
Charge Playback simulates the recorded vehicle

Released Charge Playback functions repeat recorded vehicle-side behaviour at the EVSE’s physical charging interface.

Explore Charge Playback
Bring the vehicle-specific case into EVSE validationThe real charging pair comes first. Then confirm the released vehicle-simulation and Charge Playback functions needed to repeat that case against the charging station in the laboratory.
Open Interoperability and Charging Analysis

Charging technologies and standards

EVSE charging interfaces: AC, DC CCS / NACS, CHAdeMO, GB/T and MCS

Communication, low-level signals, power hardware, Test Libraries and released functions follow the charging technology being tested.

ACAC charging

IEC 61851-1, SAE J1772 and ISO 15118 where applicable, with CP and PP simulation and functional testing.

CCS / NACSDC CCS and NACS

IEC 61851-23, DIN 70121, ISO 15118-2, ISO 15118-3 and ISO 15118-20 according to configuration.

CHAdeMOCHAdeMO

EV simulation, CAN communication, low-level behaviour and functional workflows for supported versions.

GB/TDC China / GB/T

GB/T 18487.1 and GB/T 27930 variants with technology-specific communication and state evaluation.

MCSMegawatt Charging

10BASE-T1S, ISO 15118-20, CE and ID, auxiliary supply, temperature, cooling and high-power architecture.

IEC 61851-23 electrical test coverage, conformance profiles and high-power fault cases require the corresponding system hardware and released Test Library scope.

EVSE test equipment by lifecycle stage

EVSE test equipment: laboratory, production, commissioning and service

EVSE product lifecycle overview: PDF · EN · 1 page

Communication development
EVCA ComOnly

EV simulation, protocol analysis and communication development on a bench without full-power equipment.

Laboratory development
EVCA Flex

Communication, signals, power integration, fault simulation, conformance and automation.

Mobile laboratory and field
EVCA Multi Mobile

Portable multi-standard measurement and simulation for validation and field work.

Focused real-pair analysis
EVCA Interop

Real EV-to-EVSE capture, synchronised recordings and field-to-laboratory transfer.

Megawatt Charging
EVCA MCS

Dedicated MCS communication, signals, cooling and high-power architecture.

 EMC testing
EMC Link

Transparent optical charging communication across the EMC chamber boundary.
Production
Easy Chester EOL

Repeatable manufacturing tests with functional checks, parameter verification and traceable results.

High-power production
Easy Chester EOL HPC

Production and high-power end-of-line workflows with project-specific integration.

AC installation, commissioning and electrical safety
Easy Chester Micro

AC commissioning, maintenance and periodic inspection with electrical safety checks.

AC/DC installation, commissioning and electrical safety
Easy Chester Ultimate

AC/DC commissioning, maintenance and service with electrical safety checks, charging-function tests and guided reports.

Calibration and billing accuracy
Easy Chester Calimera

Mobile on-site calibration and metrology-related verification.

Software and reports
comframe

Configure tests, compare messages with measurements, automate runs and report the station’s response.
Formal verification
Conformance Test Libraries

Defined test cases, standard editions, DUT roles, verdicts and reports.

Validate supplied EVSEs before release

Operators and integrators need test records for new suppliers and for hardware or firmware changes. Repeatable Easy Chester reference service checks sit alongside deeper EVCA laboratory qualification, each with a defined scope.

Use the four-step supplier-release workflow

Technical background

Frequently asked questions

EVSE testing

What is EVSE testing?

EVSE testing verifies the electrical, functional and communication behaviour of a charging station. The EVSE is the device under test, while the system represents the vehicle side and creates controlled conditions.

What is the difference between EV testing and EVSE testing?

During EVSE testing, the charger is the device under test and the system simulates a vehicle. During EV testing, the vehicle or EVCC (vehicle-side charging communication controller) is the device under test and the system simulates a charging station.

Can a charging station be tested without a real vehicle?

Yes. An EV simulator can reproduce low-level states and high-level charging communication. Depending on the test scope, it can coordinate a battery emulator or load for repeatable power testing.

What is the difference between a compact EVSE tester and a laboratory system?

A compact EVSE tester guides defined function, safety, commissioning and service checks. A configured laboratory system provides additional protocol-conformance and robustness tests, power equipment, fault injection, automation and synchronised analysis.

What is the difference between conformance and interoperability?

Conformance testing verifies one implementation against defined requirements and test cases. Interoperability testing investigates how two concrete implementations behave together in a real charging session.

More on this topic

Practical examples and further reading

Customer projects, success stories and technical articles related to this page.

Select the EVCA configuration for your test plan

EV testing needs a defined charging-station side; EVSE testing needs a defined vehicle side. The EV Charging Analyzer connects both roles within the EVCA platform. Interfaces and Test Library release follow the test plan. The product page describes configurations; this application page describes the workflow.

Charging-station test planning

Plan charging-station validation

Test system and power equipment follow your development stage, vehicle behaviour, communication checks and fault cases.

From the demo to your first test:

  1. 15-minute demo. An engineer shows your charger test case on a real EVCA system.
  2. Written quotation. EV simulation, power equipment, Test Libraries and integration for your task – then you order.
  3. Delivery and start. Commissioning and training are agreed in the quotation.
Open Product FinderRequest a 15-minute demo

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¹ Scope

Functions, charging standards, interfaces, power ratings and Test Libraries depend on the EVCA system, the software release and your project configuration. Automated standards analysis supports, but does not replace, formal conformance testing. The quotation confirms the scope for your project.