EVSE testers for installation, production and calibration
Test charging stations – from production line to field service.
Easy Chester is the comemso family of EV charger testers: Micro and Ultimate for commissioning and inspection, EOL for production lines, Calimera for calibration – instead of a test vehicle plus separate instruments.1
Ultimate line in the field since 2016. “…we can guarantee our customers quick service calls …” – Michael Borowski, synfis
- What for
- Installers, service teams, charger manufacturers and calibration labs who test charging stations through their whole life.
- What it does
- Four testers: Micro (AC) and Ultimate (AC/DC, test load up to 60 kW) on site, EOL in production, Calimera calibration up to 260 kW DC.
- Not for
- Development and conformance testing of new charger designs – that is EVCA.
A charger that fails after installation means a second site visit – and an operator waiting for a working charging point.
Sorted by test task
Start with the work you need to do.
Each task leads straight to the relevant system.
Compact AC installation tester for charging stations and wallboxes. Guided safety, communication and charging checks for commissioning and inspection.
AC/DC installation tester for electrical safety, charging function and communication during commissioning, maintenance and repair verification.
Compares AC/DC charging-station measurements with a traceable reference.
Repeatable production checks. Power and integration scope follow your task.
For protocol analysis or standards-conformance testing, explore the EVCA platform.
Production application
Define the factory release process before selecting EOL or EOL HPC.
First define the charger variants, acceptance criteria, cycle time and power boundary. Include automation, traceability and optional metrology, then select the Easy Chester product configuration.
EVSE lifecycle testing
One charging station. Different results at every stage.
Manufacturing needs a release decision, commissioning verifies safety and function, service verifies fault correction, and calibration checks measurement traceability. Each stage needs its own method and record.
Sorted by task and environment
Five purpose-built EVSE tester paths.
Easy Chester EOL
Configured AC/DC checks for a repeatable charging-station production sequence.
- Use when
- Every manufactured charger needs the same approved function, communication and parameter checks.
- Main result
- Unit identity, test execution, verdict and production report.
- Optional extension
- Calimera GUI plus project-specific AC/DC power meter.
Easy Chester EOL HPC
High-power DC production testing within the configured electrical and safety limits.
- Use when
- The production cell must coordinate charging communication, external power or load hardware, cooling and safety.
- Main result
- Traceable high-power operating points, sequence results and release decision.
- Optional extension
- Calimera GUI plus project-specific AC/DC power meter.
Easy Chester Micro
Compact AC installation tester for commissioning, electrical safety, maintenance and periodic inspection.
- Use when
- A portable, guided AC workflow is the primary requirement.
- Protocol scope
- AC charging-function tests, including ISO 15118-2 communication with EIM authentication.
- Roadmap
- ISO 15118-20 communication · planned for Q1/2027.
Easy Chester Ultimate
AC/DC installation tester for commissioning, electrical safety and charging-function checks, with guided reporting for maintenance and service.
In the field since 2016Ten-year anniversary in 2026. Ultimate product line.
Field experience and test principle
- Use when
- A technician must verify charging function, communication and electrical safety at installed infrastructure.
- Main result
- Guided test steps, measured values, verdicts and field report.
- Typical tasks
- Commissioning, repair verification, service and periodic EVSE inspection.
Easy Chester Calimera
AC and DC energy-meter calibration with controlled real load and reference measurement.
PTB certifiedEasy Chester CalimeraView certification details
- Use when
- You measure the installed charger under controlled operating points in its real operating environment.
- Main result
- Reference values, charger values, comparison and calibration record.
- Typical tasks
- On-site calibration and metrological verification of AC or DC charging infrastructure.
Optional production metrology
Keep calibration evidence connected to the end-of-line result.
The Calimera GUI and a project-specific AC or DC power meter add production metrology to EOL or EOL HPC.
National legal-metrology requirements, approved procedures, measurement ranges, uncertainty, reference equipment and report formats remain market- and project-specific.
Shared Easy Chester foundation
Guided checks and records across the Easy Chester family
Each system guides the operator through charging-specific tests and keeps the measurements with the result.
Guided workflows
Follow the prerequisites and active test step, then review the measured value, verdict and report.
Charging-specific depth
The test disciplines your task requires come together, including charging-specific checks alongside electrical measurements.
Measurements linked to their test conditions
The result stays connected to the tested charger, site, configuration or production identity.
Purpose-built roles
Production release, field assurance and metrology each get their own methods and records.
Configuration inputs
Define six facts before selecting hardware and options.
Choosing wallbox test equipment for a professional inspection? The wallbox testing guide separates charging-function checks, electrical safety checks and equipment selection in the inspection plan.
Product-family boundary
Easy Chester standardizes operational EVSE testing. EVCA opens the engineering test space.
Easy Chester
- Repeatable factory acceptance
- Guided commissioning and field service
- Periodic inspection and structured reports
- Mobile or production-integrated metrology
EVCA
- Development simulation and measurement
- Conformance and robustness testing
- Interoperability root-cause analysis
- Fault injection, manipulation and laboratory reproduction
Ultimate combines functional, load and electrical safety checks for commissioning, maintenance and periodic inspection. Its vehicle-like charging behaviour helps establish the active charging session needed for some checks.
Choose your installation tester
Micro provides the AC functionality of Ultimate. Ultimate adds DC charging tests.
AC EVSE installation tester
Micro, the compact AC tester, covers electrical safety checks during commissioning, maintenance and periodic inspection of AC charging stations and wallboxes.
Explore the AC installation testerAC/DC EVSE installation tester
Ultimate covers commissioning, electrical safety and charging-function checks at AC and DC charging stations, with guided reporting for maintenance and service.
Explore the AC/DC installation tester| Installation, commissioning and periodic inspection | Easy Chester Micro | Easy Chester Ultimate |
|---|---|---|
| AC charging stations and wallboxes | ✓ Yes | ✓ Yes |
| DC charging stations | – No | ✓ Yes |
| Installation, commissioning and maintenance | ✓ AC | ✓ AC and DC |
| Grid-side electrical safety tests | ✓ Yes | ✓ Yes |
| EV-side electrical safety tests | ✓ AC | ✓ AC and DC |
| Phase-sequence testing | ✓ Yes | ✓ Yes |
| AC communication: ISO 15118-2 | ✓ Available now, with EIM authentication | ✓ Available now, with EIM authentication |
| ISO 15118-20 communication | ◷ Communication extension planned for Q1/2027 | ◷ Communication extension planned for Q1/2027 |
| TLS-secured communication | – Currently unavailable | – Currently unavailable |
Frequently asked questions
Easy Chester EVSE tester questions
What is the Easy Chester product family?
Easy Chester is the comemso family of purpose-built EVSE testers for charging-station production, commissioning, service, inspection and calibration.
Which Easy Chester is used for charging-station commissioning?
Easy Chester Micro supports AC installation and commissioning. Easy Chester Ultimate covers AC and DC charging stations. Both combine guided charging-function, communication and electrical safety tests with reporting for the selected configuration.
Which system is used for EVSE maintenance and periodic inspection?
Use Micro for AC maintenance, repair verification and periodic inspection; choose Ultimate when DC charging stations are also in scope.
Which Easy Chester is used for EVSE end-of-line testing?
Easy Chester EOL is the compact production path for repeatable function, communication and parameter verification with traceability. Easy Chester EOL HPC extends the production role to high-power charging products and project-specific power, cooling, switching and safety integration.
What is the difference between Easy Chester EOL and EOL HPC?
EOL HPC is selected when the production cell must coordinate high-power operating points, external source or load hardware, cooling, interlocks and safely sequenced automation.
Can calibration be added to Easy Chester EOL or EOL HPC?
Yes. Both production systems can optionally be combined with the Calimera GUI and a project-specific AC or DC power meter. This connects metrology-oriented checks with the same unit identity and production record.
Does Ultimate test standards conformance or field function and safety?
Easy Chester Ultimate performs functional, load and electrical safety checks of AC/DC charging stations during commissioning, maintenance and periodic inspection. For standards-conformance test cases covering IEC 61851-1, DIN 70121, ISO 15118, SAE J1772 or CHAdeMO, select the matching EVCA configuration.
Customer projects, success stories and technical articles related to this page.
- Customer projectEasy Chester with Long Duration Unit, March 2025Easy Chester with Long Duration Unit lets a customer examine charging continuity and the station’s response over longer sessions. Project March 2025.
- Customer projectEasy Chester Light: DC Check, October 2024Easy Chester Light in the October 2024 project: a focused DC functional check in the DIN 70121 context with a simple operator workflow.
- Customer projectEOL Testing with Customer Power Equipment, May 2025Easy Chester EOL connects customer power electronics through the Generic Source API for repeatable EVSE end-of-line tests. Project report, May 2025.
- Customer projectEasy Chester EOL: Metrology, June 2024Easy Chester EOL: EVSE meter data, reference checks with an ISO 17025-calibrated meter, and documented functional and safety tests in production.
- Customer projectMobile EVSE Calibration in a Test VanA metrology institute uses Easy Chester Calimera in a mobile test van to compare AC and DC charging station energy measurements with a reference on site.
- KnowledgeEVSE end-of-line tests and acceptanceDefine EVSE end-of-line electrical, functional and communication checks. Link results to unit identity and handle failed tests.
- Webinar archiveWebinar: Commissioning and Inspection of EVSEWebinar archive, 21 April 2026: practical charging-station commissioning and inspection, electrical safety, function and repeatable field checks.
- Product newsEasy Chester Ultimate: Guided EVSE TestingEasy Chester Ultimate guides AC/DC charging, communication and electrical safety tests at the charging station, from connection to PDF report.
- Product newsMini Charger Tester Generation 3.5Mini Charger Tester Generation 3.5 for charging-station commissioning and maintenance. Hardware and planned AC/DC functions, as announced in 2022.
Choose EVSE testing for field and production
For commissioning and service, the EV charger tester for commissioning route leads to the appropriate field test. Production workflows instead need a DUT connection, automatic sequence and result association. Each task gets the interfaces and released profiles it needs; Micro remains an AC installation tester.
AC wallbox inspection with Micro
For AC installation, electrical safety and charging function, the AC wallbox tester Easy Chester Micro route leads to the appropriate product. DC tasks need a configuration designed for that purpose.
“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.”
Field workflow planning
Product and options follow your lifecycle task.
Published project examples: October 2024: Easy Chester Light project.The articles document the configuration used in each project at that time.