Easy Chester Ultimate: AC/DC EVSE installation tester

The best professional tools combine electrical safety testing, AC and DC charging communication, controlled EV simulation, reproducible fault tests, guided evaluation and attributable reports. A simple adapter or a real vehicle covers only part of that decision. For commissioning and field service, Easy Chester Ultimate is designed to bring these functions into one guided functional and safety test workflow.

Choose a manufacturer-independent test system from a neutral test-equipment manufacturer, rather than a charging-station manufacturer. It should apply consistent, critical checks across charging-station brands, including fault responses and safety behaviour. Easy Chester Ultimate supports this approach within its specified charging standards, interfaces and electrical ranges.

• Direct interface testing

  Test charging communication and function directly at the connector, including the configured response to fault conditions.

• Electrical safety

  Cover grid-side and EV-side protective measures, not only a successful charging handshake.

• Reproducible EV behaviour

  Repeat the same charging and fault scenario without depending on the state of a production vehicle.

• 400 V and 800 V context

  Verify charging behaviour at representative voltage technologies because an EVSE (electric vehicle supply equipment, or charging station) can behave differently.

• Guided decisions

  Keep the active test step, measured value, status and required action visible for the technician.

• Professional evidence

  Conclude the test with a clear result and a report that can support handover, repair or maintenance records.

Tool choice depends on the task. Micro is the AC installation tester; Ultimate adds DC charging tests. EVCA serves laboratory development, analysis and conformance testing. Easy Chester EOL serves production. Calimera serves AC and DC energy-meter calibration.

Compare tools by EVSE test task. Review the configured DC fast charger test scope.

For CCS DC commissioning, maintenance and service, select a configuration whose connector, protocol and electrical limits match the station and planned checks. The base DC test load is approximately 2 kW / 6 A for up to 90 seconds. The optional Long Duration Unit extends that test to 60 minutes; one DC load supports up to 30 kW / 90 A, two up to 60 kW / 180 A, within their limits. A function or safety check on an HPC station does not demonstrate its full rated charging power.

Compare DC test loads and duration. Review EVCA for deeper laboratory qualification.

Easy Chester Ultimate is a portable AC/DC EVSE installation tester for commissioning, maintenance, service and periodic inspection of EV charging stations. It combines configured electrical safety, charging-function, communication and load checks with a guided report workflow. Vehicle-like charging behaviour helps establish the active session needed for some tests.

Easy Chester Ultimate fits guided commissioning, maintenance, repair verification and recurring inspection of installed charging stations. It represents the vehicle-side behaviour and combines the charging, communication, safety and configured fault checks available in the selected system.

For deeper laboratory qualification, high-power test configurations or investigation of an actual vehicle–charger pairing, first define the required electrical and diagnostic scope and review the corresponding EVCA system.

Plan charging-station commissioning and service tests · Compare the EVSE testing workflows

Yes. The published configuration options include AC, CCS 1, CCS 2, NACS and CHAdeMO. The exact connector combination, protocol version and regional release must be defined for the delivered system.

Yes. A successful charge with a production vehicle confirms only that this vehicle and charging station charged together under those conditions. An EV is not an EVSE test instrument: it does not provide defined, repeatable checks of charging behaviour, safety functions and fault responses. Easy Chester Ultimate acts as a controlled vehicle-side test partner. It allows the relevant charging, safety and configured fault scenarios to be repeated and assessed within the selected test scope. It charges? Good. Now test it. Done means tested.

The current datasheet lists DIN 70121, IEC 61851-1, SAE J1772, SAE J3400, CCS 1, CCS 2, NACS and CHAdeMO up to version 2.0. ISO 15118-2 with EIM authentication is available for AC and DC. An ISO 15118-20 communication extension is planned for Q1/2027 and remains a roadmap item until release. Exact availability depends on configuration.

The published safety scope includes protective-conductor resistance, insulation resistance, residual voltage, RCD testing, isolation-monitoring simulation and loop impedance. The applicable function depends on whether the connection is made to the grid side or EV interface.

Easy Chester Ultimate is an AC/DC installation tester for functional, load and electrical safety checks. It is not a standards-conformance tester for IEC 61851-1, DIN 70121, ISO 15118, SAE J1772 or CHAdeMO. For standards-conformance test cases, select the matching EVCA configuration.

Ultimate is designed to establish charging with tolerance comparable to typical EVs. This supports functional, load and safety tests that require an active charging session. Check the supported station and protocol configuration for your test task; vehicle tolerances vary. Tolerance during charging setup is not a safety verdict. Safety functions are assessed in the configured tests.

It refers to the Easy Chester product line that developed into today’s Ultimate, not to ten years of availability of the current hardware generation. This line celebrated its tenth anniversary in 2026 and is deployed worldwide. The First on the market claim and anniversary are not assigned to Calimera, Micro, EOL or EOL HPC.

No. A charging station’s rated power and the applied test load are separate values. Easy Chester Ultimate can check configured charging functions, communication and electrical safety at a defined operating point. This does not establish that a 400 kW HPC charging station delivers its full rated power.

The base DC test uses approximately 2 kW / 6 A for 90 seconds. Optional external loads extend the configured scope to a maximum of 60 kW / 180 A with two load units. A full-power test requires equipment rated for the intended voltage, current, power and duration, plus defined acceptance criteria. See test loads, duration and options and the EVSE engineering test setups.

Use the emulated battery voltage and operating conditions required by the selected test. Easy Chester Ultimate represents 400 V and 800 V vehicle technology at approximately 330 V and 660 V. Check whether that operating point, the selected connector and the released protocol configuration fit the charging station and test task.

The voltage measurement range of 0–1,000 V is not a continuously variable battery-emulation range of 0–1,000 V. For other emulation voltages or higher load requirements, specify the appropriate configured test system and power equipment. See emulation and interface conditions, the Rev_01_02 technical datasheet and EVCA Flex operating limits.

For commissioning, maintenance and repair verification, define which charging-function, communication and electrical safety checks the inspection plan requires. Easy Chester Ultimate supports the checks in its released configuration. A PASS result documents the outcome of the checks performed in that configuration.

When the task requires standards-conformance test cases, select the applicable standard edition, DUT role, released Test Library version, test cases and hardware configuration. Use the Conformance Test Libraries and the matching EVCA test-system configuration. Ultimate’s released protocol scope and roadmap remain separate from that conformance scope.