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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
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COMPARISON. FIELD TESTING

DC fast charger tester or installation tester with adapter: what each can show

An installation tester with an EV test adapter covers the protective-measure checks of an AC charging point and simulates the vehicle states on the control pilot. It cannot start a DC charging session: that needs high-level communication (DIN 70121 or ISO 15118) and a load. Easy Chester Ultimate does both on AC and DC chargers – it charges like a vehicle, runs the safety checks and documents every result in one report.

Installation tester with adapter and Easy Chester Ultimate side by side

CriterionInstallation tester + EV test adapterEasy Chester Ultimate
Protective measures at an AC charging pointYes – the core task of the installation tester.Yes, grid- and vehicle-side safety checks (option).
AC charging functionControl-pilot states and basic vehicle behaviour via the adapter.Charges like a vehicle; checks charging function and communication.
DC fast chargerNo DC charging session.DC session with real charging current: test load up to 30 kW / 90 A per unit, 60 kW / 180 A with two units cascaded.
Charging communicationNot covered.IEC 61851-1, SAE J1772, SAE J3400, DIN 70121, ISO 15118-2 with EIM (AC/DC), CHAdeMO up to 2.0; ISO 15118-20 planned for Q1/2027.
Fault simulationLimited to the switches of the adapter.Defined faults on CP, PP, PE and isolation (option).
Evaluation and reportSeparate devices; results merged by hand.Guided sequence and one PDF report per charger with PASSED or FAILED.

Where the adapter is enough – and where it is not

  • Enough: AC wallboxes and charging stations where the protective measures and the basic charging states must be checked, for example at the initial verification of a new installation.
  • Enough: inspection scopes without DC chargers.
  • Not enough: DC fast chargers – there is no charging session without high-level communication and a load.
  • Not enough: a failure that depends on the charging communication, or a repeat of the same defined fault after a repair.
  • AC only, one instrument: Easy Chester Micro combines the installation tester and the adapter for wallboxes and AC chargers.

Questions about this comparison

Can Easy Chester Ultimate prove the full rated power of a high-power charger?

No. Its test load reaches 30 kW per unit and 60 kW with two units cascaded. Proving full rated power needs a suitable load setup; standards-conformance tests are covered by EVCA.

Does Ultimate replace my installation tester?

For charging points, the optional safety checks cover grid- and vehicle-side protective measures in the same guided pass. Which measurements your inspection requires depends on the applicable standard and your method; compare them with the configured Ultimate options.

Is there a version for AC chargers only?

Yes. Easy Chester Micro tests wallboxes and AC chargers with one instrument instead of two.

Which charging interfaces does Ultimate support?

AC Type 1 or Type 2, CCS 1, CCS 2, NACS and CHAdeMO, by configuration.

Sources and further reading

Technical content: comemso. Updated .

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