This manual provides guidelines for use by Notified Bodies under the MID Directive 2014/32/EU, as well as other laboratories responsible for energy meter testing.
Energy meter parameters
| Parameter | Zaptec Pro MID | Zaptec Go 2 |
| Certification | MID Class B | MID Class B |
| Harmonized Standard | EN 50470 -1, - 3 | EN 50470 -1, -3 |
| MID certificate | N-18/3585 | T12806 |
| Notified Body | NMi Certin (0122) | NMi Certin (0122) |
| Rated Voltage | 3 x 230/400 V | 3 x 230/400V |
| Rated Current | 0.25-5 (32) A | 0.25-5 (32)A |
| Optical Test Output ( Activated via app) | 10000 imp/kWh | 10000 imp/kWh |
Reading MID software version
This section explains how to read the MID software version for Zaptec Pro and Zaptec Go 2.
Zaptec Pro
MID software version can be read from the display using one of the following methods:
-
Plug in and out method:
Plug in a Type 2 charging cable, immediately remove it, and plug it back in. Ensure no car is connected. -
Reset the charger:
Reset via the Zaptec app (PIN code required) or by turning the power off/on.
Zaptec Go 2
The Zaptec Go 2 has a "MID mode" that allows you to read the MID software version and energy registers. The display will cycle through the following screens:
Indicates the currently displayed value is the cumulative import energy register.
Indicates the currently displayed value is the cumulative export energy register.
v Indicates the currently displayed value is the software version of the measuring instrument.
You can read the MID software version and energy registers on Zaptec Go 2 in three ways:
-
Plug and remove method:
Disconnect the cable from the charger. Plug in a Type 2 cable, immediately remove and reinsert it (without a car connected). The display cycles between showing the total import/export energy (kWh) and the software version, each for 5 seconds. Repeating for 30 seconds. -
Reset the charger:
Ensure the charging cable is disconnected. Reset the charger via the Zaptec app (PIN required) or turn the power off/on. If the charger is new and hasn't been configured, a QR code will be displayed. Once configured, the MID details will appear for 30 seconds. You can override this by using the Plug and remove method, even if the QR code is showing. -
Enable field test mode:
Use the Zaptec app to activate the field test mode (PIN required). In this mode, the energy display precision increases, and maximum values can be shown as limited. If you need to take precise readings, consider using one of the other methods.
Testing integrated energy meter
Terminology
-
(Charging) installation: A collection of charging points on one top-level circuit,
possibly with sub-circuits, managed under one administrator. - Total import energy(kWh): Energy consumed by the charging station from external sources to the vehicle (e.g., grid).
- Total export energy(kWh): Energy that the station provides to external systems from the vehicle (e.g., grid).
Methodology
Simple testing of the integrated energy meter’s accuracy is best done in the field. This allows for a quick test without needing to install and configure a replacement
charger while a unit is being sent for testing.
- To test in the field, commercially available equipment is available which is specialized for metering the energy delivered by a Type 2 socket, an example being the MTE eMOB I-32.3 AC.
- Alternatively, a custom-made Type 2 cable can be combined with a generic portable reference standard. We recommend using a car as the load, but a resistive load can also be used if a car simulator is available for controlling the charging cycle. The delivered energy to the load can then be measured with the portable reference standard.
The charging stations's status indicator LED ring acts as a pulse output and needs to be set to Field test mode before testing. See the next section for instructions.
Note: For in-dept laboratory testing with isolated sources, contact Zaptec Support to temporarily deactivate the residual current detection.
Requirements for in-situ testing
- An electric vehicle with 3-phase capable onboard charger (if relevant).
- A portable reference standard.
-
Type 2 cable assembly with ability to connect to reference standard voltage
and current inputs. - Phone with Zaptec app installed (Android or iOS).
- If the installation has user authentication active you need cooperation from the installation owner for the charging point to provide energy.
Field test mode: How to test
- Open the Zaptec app and log in with your Zaptec account.
- From the Home screen, tap the top right
icon and choose Configure products.
- Connect to the charger via Bluetooth using the PIN code.
- In Advanced settings, toggle on Field test mode, and tap Save.
- The LED ring will turn off, indicating the charger is ready for energy pulse output.
- Connect the load for testing. After testing, return to the app, turn off Field test mode toggle-switch, tap Save.
- Field test mode will automatically deactivate after 4 hours or upon power cycling the charger. This will reset the LED light ring to normal operation.
-
Precision increases in this mode, so the displayed maximum values might be limited.
Note: If directly connecting to a charging vehicle, ensure reference standard can withstand at least 32A continuous current. For assistance with testing the energy meter - go to zaptec.com/support
Laboratory testing
In addition to reconfiguring the LED ring as for the field test, the following modifications are required on units submitted for test at laboratories:
- The residual current circuit breaker is disabled, allowing the charging station to be tested with isolated current loops.
- The safety relay closes automatically, without the need of a Control Pilot signal, which is normally required for operation.
With these modifications, the charging station can be tested as a conventional energy meter, using the connection clamps (Backplate on Zaptec Pro) as the input and the Type 2 socket as the output. For safety reasons, only Zaptec can enable this test mode.
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