Commissioning and electrical safety testing
CCS EVSE tester for commissioning, service and end-of-line testing
Use an Easy Chester CCS EVSE tester for DC commissioning, service and fault diagnosis, with AC checks available according to the configuration. Run guided checks for electrical safety and charging function. Choose Easy Chester Micro for AC or Easy Chester Ultimate for AC and DC. Record the configured safety and communication checks for handover, periodic inspection and field service. Use Easy Chester EOL / EOL HPC for automated production end-of-line testing.
Choose EVSE testing equipment for AC or DC field checks
Choose Easy Chester Micro for AC commissioning or Easy Chester Ultimate for AC and DC. Match the interfaces, electrical safety functions and options to the work planned at the site.
AC EVSE installation tester
Easy Chester Micro
Use Easy Chester Micro as an AC EVSE tester for charging stations and wallboxes. Check configured grid-side and EV-side electrical safety, phase sequence, communication and charging function during commissioning, maintenance and periodic inspection.
Easy Chester Micro: AC installation testerAC/DC EVSE installation tester
Easy Chester Ultimate
Use Easy Chester Ultimate as a DC EV charger tester for CCS commissioning and service, or configure it for AC charging stations. With this CCS tester, run the selected electrical safety, charging-function and communication checks and record the results. At HPC sites, match the connector, test load and electrical ranges to the planned test.
Easy Chester Ultimate: AC/DC installation testerMatch the test configuration to the required checks. Evaluate electrical safety separately from a successful charging session.
Before testing HPC or 800 V charging stations, check station rated power and test load, emulation voltage and measurement range, and communication checks and standards-conformance scope.
What the guided service workflow provides
As a fast charger tester, Easy Chester Ultimate supports checks on AC and DC charging points in the appropriate configuration. The guided workflow connects the planned electrical-safety checks with charging-function tests. Define the interface, test method and released scope before use.
Keep the equipment identity, firmware, executed method, measurement information and result for handover and later maintenance. After a repair, repeat the same test under comparable conditions and link any deviation to the charging point that was tested.
When a check fails, start with the failed step and its measurement information. Connecting the electrical checks with the charging sequence helps narrow the investigation and verify the effect of a correction. Easy Chester Micro remains an AC installation tester.
Your path to DC EVSE commissioning
Plan the DC commissioning workflow.
Select the Easy Chester Ultimate configuration for your DC charging station, review the test scope and see the planned commissioning or service workflow in a demo.
Testing throughout the charging station lifecycle
Repeat defined checks at handover, during operation and after repair.
Record the station identity, test configuration, observed behaviour and final decision at each stage. This gives later inspections and repairs a clear reference.
Initial commissioning
Check the installed charging station before handover. Verify the applicable protective measures, charging communication and energy transfer, and record the initial configuration.
Decision: ready for operation?Preventive maintenance
Repeat defined checks before a failure occurs. Compare the results with the commissioning baseline to identify changes in safety, interface behaviour or charging stability.
Decision: continue operating or intervene?Corrective service
Reproduce the reported fault with a defined test counterpart. Isolate the affected layer and record the findings to guide the repair.
Decision: root cause found?Recommissioning
After a repair, component replacement, firmware update or site modification, repeat the affected checks. Document whether the station meets the requirements for its released condition.
Decision: repair verified?Results for the next field action
EVSE tester for safety, charging function and repair results
Is the electrical installation safe?
Have qualified personnel evaluate the applicable grid-side and charger-side protective measures with suitable test equipment.
Does the EVSE interface behave correctly?
Check connector and locking behaviour, Control Pilot (CP) and Proximity Pilot (PP) states, PLC (power line communication) or CAN communication, interlocks and configured error reactions.
Can the station complete a defined charging test?
Use an EV simulator to define charging requests, repeat start and stop conditions, and verify the station’s response.
Has the reported fault actually been removed?
Repeat the affected checks under the original test conditions and compare the results before and after repair.
Inspection, safety and charging tests
Plan your EVSE test: installation, safety and charging function
Set the test plan for the station, installation, charging technology, market and available equipment. Document the included checks and any checks outside that scope.
Cables, connectors, enclosure, labeling, damage, contamination and accessible components.
Applicable protective conductor, insulation, residual-current and installation measurements using the required qualified equipment.
Protective-earth interruption, isolation-monitoring behaviour, CP faults, residual voltage and configured interlocks.
CP and PP states, duty cycle, plug connection, locking and technology-specific control signals.
DIN 70121, ISO 15118, CHAdeMO, NACS or other supported communication according to the selected configuration.
Charge start, contactor sequence, voltage, current, stop behaviour and the station reaction to a controlled vehicle request.
Defined 400 V or 800 V conditions, extended charging time, load behaviour and faults that emerge only after operation.
Station identity, test configuration, executed checks, measured values, deviations and the handover or service decision.
Configured test scope. Select the hardware, software and options for the required grid measurements, charging interfaces, power levels, communication standards, fault simulation and reporting. The selected configuration determines which layers and checks are available.
How to test a CCS DC fast charger in the field
Use Easy Chester Ultimate for CCS DC commissioning and maintenance within the selected configuration. Follow the released device procedure and installation inspection plan. Record the results of each step below.
- Define the test boundary
Record station identity and firmware. Confirm the connector, protocol, voltage technology, test load and required inspection scope.
- Verify electrical safety
Perform the applicable grid-side and EV-side protective-measure checks with the configured equipment and qualified responsibility.
- Check the charging sequence
Use controlled EV behaviour to check communication, charge start, voltage/current and charging stop within the selected test-load limits.
- Verify faults and repairs
Run released fault scenarios and repeat the affected checks after repair. Compare results under the same defined conditions.
- Document the result
Record the configuration, executed checks, measured values, deviations and handover or service decision in the report.
For an HPC site, the charger rating and applied test load are different quantities. Confirm the Ultimate test scope and DC load options before specifying the checks.
Download the EVSE inspection checklistDocumented field results
Keep field results useful for the next inspection or repair.
Record what was tested, the test conditions, observations and final decision. This lets the next technician or responsible team follow the result.
Responsibilities in the field
Give installers, service teams, CPOs and manufacturers a shared record.
Different teams may test the same station. Agree responsibilities so the required checks are completed without duplicating work.
Installers and commissioning teams
Establish the initial safety and functional baseline before handover.
Service technicians
Reproduce the fault, guide the repair and verify the corrective action.
Charge point operators
Use consistent maintenance records to compare locations and pass unresolved incidents to the responsible team.
EVSE manufacturers
Provide product knowledge for field procedures and use the test results as technical feedback.
From a charging fault to a diagnosis
Locate the fault before contacting support.
Use a vehicle to check a real vehicle–station pairing. Add an EV simulator and the applicable safety measurements for controlled fault diagnosis and documented station checks.
Charging failed. What do you know?
- Symptom: This vehicle does not charge at this station.
- Cause: EV, EVSE, installation, interface or communication has not yet been isolated.
- Test scope: Controlled EVSE safety and fault checks require a defined test setup alongside the real vehicle pairing.
Reproduce the fault and plan the next action.
- Function: Repeat the charging sequence under defined conditions with an EV simulator.
- Safety and faults: Run the applicable configured checks and repeat selected station reactions under defined conditions.
- Evidence: Record the results and involve the EVSE manufacturer with specific findings when needed.
EV-like tolerant charging behaviour supports functional, load and safety tests. It does not relax safety evaluation or replace conformance testing.
Tools and guidance for field testing
Choose your EVSE tester: Micro for AC, Ultimate for AC/DC and EOL for production
See how commissioning and service connect with development, validation, production and operation.
Prepare visual, electrical and functional inspection with a compact checklist.
Guided AC/DC field testing with recorded station settings and results.
Get help with commissioning, training, technical support, repair and lifecycle questions.
Plan the installation, inspection and electrical-safety checks alongside the vehicle charging test.
Use your own operating figures to model unavailable charger-hours, service costs and repeat visits.
Customer experience in commissioning and service
Johansen’s feedback refers to the Mini-Charger-Tester, predecessor to Easy Chester Micro.
“As a product-independent full-service provider for sustainable charging systems, comemso not only convinced us because of their market establishment, but above all because of the manufacturer-independent application options. In this way, we can guarantee our customers quick service calls and feedback on the reliable functioning of their charging points.”
“We’ve been using the comemso Mini-Charger-Tester to test our hyper-fast charging, and we’re impressed by the ease of use, stability and precision of the compact solution.”
“Fantastic piece of testing kit.”
For operators and integrators
Test the change before it reaches your charging network.
- New supplier
- New station type
- Firmware or hardware update
- Validate in the laboratory
Use EVCA Flex to check EVSE conformance and robustness after a hardware or firmware change.
- Verify field testability
Run the updated station with Easy Chester. Check whether new control algorithms complicate charging or interrupt field tests.
- Review and release
Document the versions and results. Resolve deviations with the supplier and repeat the checks before the operator decides on rollout.
CCS, CHAdeMO and NACS: choose the EVSE tester for your DC interfaces
A CCS EVSE tester from the Easy Chester family simulates the vehicle for charging-function checks. For CCS1 and CCS2, select the appropriate interface and required communication profiles. CHAdeMO and NACS also need their intended configurations. Choose the portable EVSE tester around connector, test objective and electrical operating range; the product label alone does not define the complete test scope.
For CCS, EVSE testing checks the configured charging communication using DIN 70121 or ISO 15118. Specify the supported protocol version for CHAdeMO. For NACS, the coupler and communication profile determine the workflow. The EVSE tester documents measurements, messages and assessment within the released scope. Compare EVSE testing across interfaces using an explicitly identified test plan.
When testing a fast charger after repair, first record the reason and the changed component. Repeat the original fault case and affected safety and charging-function checks. The CCS EVSE tester supplies defined vehicle conditions. Store station identity, firmware and configuration so the next service visit can refer to the same evidence.
Easy Chester Micro is an AC installation tester, not a DC CCS tester. An appropriately configured Easy Chester Ultimate combines AC and DC tasks; Easy Chester EOL supports production workflows. Choose a fast charger tester around the required result and interfaces. The EV charger tester used for development analysis can require a different arrangement from field EVSE testing.
CHAdeMO testing: preserve the interface-specific result
CHAdeMO testing needs the correct connector, released profile and defined initial state. Start with a known normal case and record an interruption with its timing. When comparing a CHAdeMO fault with CCS, preserve the different protocol sequences. One charging station can produce a different result at each connector. An EVSE tester should keep that association clear in the test record.
Guided EVSE testing for service teams
A guided EVSE tester connects preparation, measurement and result documentation. The EV charger tester must make the required inspection steps and active configuration clear to the team. Compare supported test scope, transport requirements, connectors, software, handling and result documentation for the actual service task. These criteria help select suitable EVSE testing equipment for the charging points your team maintains.
Easy Chester · EVSE end-of-line testing
For laboratory development and qualification, the EV charging tester EVCA provides appropriate simulation and analysis arrangements. For field work, select the CCS EVSE tester around the service workflow, connector and required evidence.
Frequently asked questions
EVSE commissioning and field-service questions
What should be tested when commissioning an EV charging station?
Identify the station and configuration, inspect the installation and verify the applicable protective measures. Check the EV interface, run a defined charging session and document deviations and the handover result. The exact scope depends on the installation, charging technology, local requirements and configured test system.
Can a DC fast charger be commissioned with a real vehicle?
A real vehicle checks one vehicle–charger pairing under the conditions present at that moment. Use a defined EV simulator for repeatable vehicle states, fault scenarios and station diagnosis, together with the applicable electrical-safety measurements. A successful vehicle session alone does not cover that commissioning scope.
What is the difference between electrical installation testing and EVSE functional testing?
Electrical installation testing evaluates the supply-side installation and protective measures. EVSE functional testing evaluates the charging interface, communication, station reactions and the ability to conduct a controlled charging session. A complete commissioning plan may require both.
What should be checked after an EV charger repair?
Repeat the affected safety and functional tests, reproduce the original symptom where possible, verify the repair under defined conditions and record the final configuration, measured results and release decision.
Does the workflow cover AC and DC charging stations?
Use Easy Chester Micro for AC charging stations and wallboxes, or Easy Chester Ultimate when DC charging tests are also required. Both installation testers support configured electrical safety, charging-function and communication checks for commissioning, maintenance and periodic inspection. Match connector hardware, charging standards, electrical ranges and safety functions to the intended work.
Can charging communication faults be diagnosed in the field?
Guided field systems check charging function and expose defined errors. Use EVCA Multi Mobile or EVCA Interop for more complex protocol, timing or cross-layer faults, or reproduce supported recorded behaviour in the laboratory with Charge Playback.
How can a charging-network operator check a supplier firmware update?
Record the baseline with the agreed Easy Chester reference procedure and identify the EVSE hardware and firmware. Apply the supplier update, repeat the defined checks and compare the results. Document the maintenance workflow, release decision and any restrictions.
Deeper supplier, hardware or software qualification may require an appropriately configured EVCA with additional power, fault and standards-based test scope. Passing one reference procedure supports those checks; it does not prove compatibility with every vehicle.
Use the supplier-update release workflow · Explore deeper EVCA qualification
Which EVSE tester do I need for CCS and CHAdeMO?
Select an Easy Chester configuration with the required CCS and CHAdeMO interfaces and released communication profiles. NACS needs its appropriate equipment and profile as well. Micro is intended for AC installation tasks and does not cover this DC CCS role. Match the CCS EVSE tester to the electrical operating range and the evidence required by the service plan.
How do I test a fast charger after repair?
Record station identity, firmware, repair reason and the changed component. Check the setup, repeat the original fault case and carry out the affected safety and charging-function tests. Keep the measurements, assessment and configuration with the repair record. EVSE testing should establish whether the corrected condition is reproducible, rather than rely on a single successful charging session.
Choosing the best EVSE tester for commissioning
The most intelligent EVSE tester for AC/DC commissioning and service.
Easy Chester Ultimate combines guided AC/DC charging-function and configured safety checks with a test report. Select the interfaces, safety functions and load options for the installed charging station.
Your next field visit
See the AC/DC checks for your field task.
In a 15-minute online demo, see how Easy Chester Ultimate guides configured checks through to the report. Discuss the charging interfaces and test tasks relevant to your work. After your request, we agree the demonstration scope and appointment.
Choose the system for the test task
Match the test depth to the result you need.
Choose the system for commissioning, detailed communication diagnosis, real-pair interoperability or energy measurement verification. Each task requires its own test scope.
Check AC electrical safety during commissioning, maintenance and periodic inspection.
Explore the AC installation testerCheck AC/DC electrical safety and charging function for commissioning, maintenance and service, with guided reporting.
Explore Easy Chester UltimatePortable signal, protocol and charging analysis for detailed diagnosis beyond guided pass/fail results.
Explore EVCA Multi MobileAnalyse a specific EV and EVSE together when the field problem occurs only with the real combination.
Explore EVCA InteropReproduce supported recorded charging behaviour at the physical interface for laboratory diagnosis and regression.
Open capabilityMobile EVSE calibration for energy measurement verification and legal-metrology evidence.
Open applicationUse downtime, repeat visits and truck rolls to assess the economic effect of a controlled service process.
Open calculator