Frequently Asked Questions

Rule of thumb: Load bank capacity = rated power of the device under test × 1.25 (safety margin).

Example: For a 400 kW diesel generator → choose a 500 kW load bank. This ensures you can comfortably reach 100% load without running at the absolute limit.

For data center or marine systems, also factor in power factor (PF=0.8). Contact our engineers for a detailed sizing sheet.

Yes — if the IP rating is adequate.

• Industrial containerised load banks typically meet IP55 (dust-protected and protected against water jets).
• Before use in high humidity, always perform an insulation resistance test.
• For long-term潮湿 environments, choose a model with built-in dehumidification/heating.

Minimum clearances (industry standard):

• Air intake (cold air): at least 2 m clearance.
• Air outlet (hot air exhaust): at least 5 m from any wall or obstacle.

Never place objects above the outlet — hot air recirculation will cause overheating, derating, and potential damage to resistive elements.

This is a safety protection being triggered. Check these three things first:

1. E-stop button: Is it locked? Rotate clockwise to release.
2. Over-temperature: Fan blocked or intake clogged? Clear the obstruction.
3. Ground fault: Leakage or insulation anomaly detected — inspect cables.

Monthly: Clean inlet filters, check fan operation, remove dust (dust = #1 killer of cooling).

Quarterly: Inspect all power cable terminations for looseness or oxidation.

Annually: Send to an accredited lab or the manufacturer for calibration of sensors and controllers.

Before rushing to return the unit, try these steps:

1. Check the display cable connection (often loosened during shipping).
2. Verify the control mode selector matches your operation (e.g., "Local" vs "Remote").
3. If both are fine, the display module itself may need replacement.

• Load bank = consumes electrical power to test the source (generator, UPS, battery). It's a "dummy load."
• EVSE tester = communicates with the charger (the source) to verify voltage, current, protocols, and fault handling. It simulates a vehicle.

In short: load bank tests the power source; EVSE tester tests the charging station.

Top causes — most are configuration issues, not hardware defects:

1. CAN bus wiring: CAN_H / CAN_L reversed or poor contact.
2. Protocol mismatch: Ensure the tester's protocol version matches the charger (e.g., GB/T 27930 old vs new).
3. Handshake not triggered: Some testers require a manual "start handshake" command.
4. Insulation monitoring: Some DC chargers perform an insulation test first; if the tester doesn't respond correctly, communication stops.

Yes. Professional DC EVSE testers support adjustable SOC (State of Charge) from 0% to 100%.

When set to SOC 100%, the tester sends a "battery full — stop charging" request to the charger. This validates the charger's auto-stop protection logic.

• Handheld / single-channel testers: One-to-one only.
• Rack-mounted multi-channel systems: Support 4–16 parallel channels — ideal for charging station batch acceptance and aging tests.

If you need multi-station testing, contact us for a custom multi-channel configuration.

Yes — always use the dedicated test cables supplied.

• DC fast-charge cables: Must support 1000V / 250A+ with forced air or liquid cooling.
• Signal cables (CAN): Must be twisted-pair shielded to prevent EMI.
• Keep cable length under 5 metres to avoid voltage drop and sampling errors.

• Every 6 months — CNAS-accredited 3rd-party calibration (voltage, current, CAN timestamp accuracy).
• Every 3 months — if used for metrology-certified factory test reports.
• Some high-end testers support external standard source self-calibration, reducing downtime.