SAE J3400 / NACS EVSE Testing Guide

State the AC or DC scope first

Record the SAE J3400 edition, charger implementation, coupler arrangement and whether the project covers AC, DC or defined portions of both. Identify the supply or output limits and communication functions for each mode instead of using NACS as a single undifferentiated equipment requirement.

Add regional installation, safety, metering and customer requirements as separate scope items. A quotation should identify which functions belong to the tester, adapters, instruments and external load.

• ✓ Name the SAE J3400 edition
• ✓ Separate AC and DC requirements
• ✓ Record coupler, cable and power limits

Build the functional and measurement matrix

For AC work, connect simulated vehicle states and pilot behavior with EVSE switching, available-current indication and measured output. For DC work, define the required communication stack, initialization, requested values, high-voltage sequence and external energy-absorption path.

Set evidence depth for each case: functional indication, measured values, waveform or protocol capture, timing and report fields. Confirm optional modules and accuracy before treating a model as suitable.

• ✓ Map states to charger response
• ✓ Define independent measurements
• ✓ Confirm communication and evidence options

Document safe abnormal and recovery cases

List approved pilot, communication, protective or termination conditions one at a time, together with the expected response and recovery. Apply only conditions supported by the equipment and procedure, particularly during field work.

Preserve the charger firmware, tester configuration, standard edition, measured values and limitations with every result. This baseline makes later regression or commissioning comparisons meaningful.