S-E-EVSE-01—Specifications for approval of type of electric vehicle supply equipment

Category: Electricity
Issue date: 2022-12-30
Effective date: 2022-12-30
Revision number: N/A
Supersedes: N/A

Table of contents

1.0 Scope

These specifications apply to electric vehicle supply equipment (EVSE) that have capabilities to measure the amount of alternating current (AC) electricity flow between an EVSE and an electric vehicle (EV).

These specifications apply to EVSE used in discrete transaction-based, public-use applications.

These specifications apply to Level I and Level II devices.

These specifications do not apply to EVSEs that establish a charge for electricity supplied solely on the basis of time, without regard for the amount of supplied electricity.

These specifications do not apply to features of an EVSE that establish a charge for services (e.g. vehicle parking) which are based on time measurements.

2.0 Authority

These specifications are issued under the authority of section 12 of the Electricity and Gas Inspection Act.

3.0 References

3.1 Acronyms

British Standards Institute
Aleternating current
Base maximum permissible error
Direct current
Electric vehicle
Electric vehicle supply equipment
Maximum permissible error
National Institute of Standards and Technology
Organisation Internationale De Métrologie Légale
Total harmonic distortion

4.0 Definitions

Adjustment device
Device or function incorporated in the EVSE that allows the error curve to be shifted with a view to bringing errors (of indication) within the maximum permissible errors.
Ancillary device
Device within the EVSE that is not used during the transaction.
Auxiliary power supply
Any power source other than the AC mains connection which provides power to any legally relevant functionality of the EVSE.
A binding document which solemnly declares in writing that a particular requirement of this document has been complied with and that this conclusion is an accurate representation of the facts as attested to by the signatory.
Base maximum permissible error (BMPE)
Extreme values of the error (of indication) of an EVSE, permitted by this specification, when the current is varied and voltage is within the intervals given by the rated operating conditions, and when the EVSE is otherwise operated at reference conditions.
Bidirectional (energy) flow
Capability of EVSE to measure energy flow in both directions (to EV and from EV).
Charging level
Category of EVSE that is distinguished by input voltage(s) and output current.
Client interface
A facility of the EVSE that may be local or remote that provides access to legally relevant transaction data to a user.
Connection point

Point where an electric vehicle is connected to the EVSE. Typically this is at a connector attached to the end of an output cable from the EVSE.

Note: Where the output cable is a fixed part of the charging system, this point is defined as the connector at the end of the cable. Otherwise, the connection point is defined as the point of the charging system where the cable is plugged in.

Current circuit
Connections of the EVSE and part of the measuring element through which current flows to the electric vehicle connected to the EVSE.
Delivered energy
Energy that has flowed from the EVSE connection point to the EV.
Distortion factor (d)
Ratio of the RMS value of the harmonic content (obtained e.g. by subtracting from a non-sinusoidal alternating quantity its fundamental term) to the RMS value of the fundamental term. The distortion factor is usually expressed in percentage. It is equivalent to THD, total harmonic distortion.
Influence quantity having a value within the limits specified in this specification, but outside the specified rated operating conditions of the measuring instrument. [OIML D11:2013, 3.15.2]
Ability of a measuring instrument to maintain its performance characteristics over a period of use. [OIML D11:2013, 3.18]
Electric vehicle (EV)
An automobile that is propelled either partially or entirely by one or more electric motors and is equipped with a battery that requires recharging from an external source.
Electric vehicle supply equipment (EVSE)
A device intended to supply or receive electrical energy to or from an electric vehicle (EV) and to measure that energy, store and report the result to the customer and, if necessary, transmit the information to a billing system.
Energy, active (Ea)

Instantaneous active power integrated over time.

Ε a = τ τ + kT p ( t ) · dt


  • Εa is the active energy.
  • k is the number of cycles
  • Other symbols are as defined for "Power, instantaneous"

Note: Active energy is usually expressed in kWh or MWh. Refer to 7.1 for requirements on units of measurement.

Energy register

Part of the system that stores the energy measured in a transaction.

Note: In this document, unless otherwise noted, the term register means energy register.

Event logger
A secure form of audit trail containing a series of records where each record contains the event number corresponding to an event or change to a legally relevant parameter.
The side of an EVSE which is prominently visible to the user while charging a vehicle. EVSE that can be used from multiple sides can have multiple faces.
Part of a signal that has a frequency that is an integer multiple of the fundamental frequency of the signal. The fundamental frequency is generally the nominal frequency (fnom).
Harmonic number
Integer number used to identify a harmonic. It is the ratio of the frequency of a harmonic to the fundamental frequency of the signal.
Indicating device or display

Part of the EVSE that implements the client interface either continuously or on demand.

  • Note 1: An indicating device may also be used to display other relevant information.
  • Note 2: An indicating device is local to the EVSE.
Influence quantity
Quantity that, in a direct measurement, does not affect the quantity that is actually measured, but affects the relation between the indication and the measurement result. [OIML D11:2013, 3.15]
Influence factor
Influence quantity having a value within the rated operating conditions of the measuring instrument. [OIML D11:2013, 3.15.1]
Legally relevant
Software/hardware/data or part of the software/hardware/data of a measuring instrument which interferes with properties regulated by legal metrology, e.g. the accuracy of the measurement or the correct functioning of the measuring instrument.
Legally relevant transaction data
At a minimum, the legally relevant transaction data includes energy transferred, unit price and total value of the transaction.
Level 1
EVSE charging category that uses a 120V input supply and can provide a maximum alternating current output of 12 or 16 amperes.
Level 2
EVSE charging category that uses 208V or 240V input supply and can provide maximum alternating current outputs in the range of 15 to 80 amperes.
Maximum current (Imax)
Highest value of current at which the EVSE is specified by the manufacturer to meet the accuracy requirements of this specification.
Maximum permissible error (MPE)

Extreme value of measurement error, with respect to a known reference quantity value, permitted by specifications or regulations for a given measurement, measuring instrument or measuring system. OIML D31::2019 3.1.28

Note: Usually, the term "maximum permissible errors" or "limits of error" is used where there are two extreme values. In this document BMPE and MPE refer to the same values.

Maximum permissible error shift

Extreme values of the change in error (of indication) of an EVSE, permitted by this specification, when a single influence factor is taken from its value at reference conditions and varied within the rated operating conditions. For each influence factor there is one corresponding maximum permissible error shift.

Note: In this specification, the maximum permissible error is a combination of the base maximum permissible error and the maximum permissible error shift.

Measuring element
Part of the EVSE that transforms a current and a voltage into a signal proportional to the power and/or energy.
Minimum current (Imin)
Lowest value of current at which the EVSE is specified to meet the accuracy requirements of this specification.
Minimum measured quantity (MMQ)
The minimum quantity of energy delivered in a transaction for which the manufacturer specifies that the EVSE will meet the BMPE of the EVSE's accuracy class.
Negative (energy) flow
Direction of energy flow from the EV through the EVSE to the nominal supply. Note: For positive direction only, the opposite direction is termed reverse energy flow (see definition).
Nominal voltage (Unom)
Voltage specified by the manufacturer for normal operation of the EVSE. An EVSE may have multiple Unom.
Nominal frequency (fnom)
Frequency of the voltage (and current) specified by the manufacturer for operation of the EVSE.
Positive direction only (energy) flow
Capability of the EVSE to measure energy flow in only one direction (to EV).
Positive (energy) flow
Direction of energy flow to the EV.
Power, active

The integral of the instantaneous power over a single cycle.

P = 1 Τ 0 T u ( t ) i ( t ) dt


  • T is the period of the voltage waveform.

At sinusoidal conditions, active power is the product of the RMS value of current and voltage and the cosine of the phase angle between them, calculated for each phase. It is usually expressed in kW.

Active power P = UI  cos  φ .

Power factor (PF)
Ratio of the active power to the apparent power. At sinusoidal and either one-phase or symmetrical three-phase conditions, the power factor (cos φ) is the cosine of the phase difference φ between voltage U and current I.
Power, instantaneous

Rate at which energy is transported. Instantaneous power is the product of voltage and current at each instance of time.

p ( t ) = u ( t ) i ( t )


  • u(t) is the instantaneous voltage
  • i(t) is the instantaneous current
  • p(t) is the instantaneous power
Relative error (of indication)

Measured quantity value minus reference quantity value, divided by the reference quantity value. The relative error is usually expressed as a percentage.

Note: Since this specification deals only with relative error, the short form "error" is used for relative error.

Rated operating condition

Operating condition that must be fulfilled during measurement to ensure that a measuring instrument or measuring system performs as designed. [OIML D11:2013, 3.16]

Note: Rated operating conditions generally specify intervals of values for a quantity being measured and for any influence quantity.

Received energy
Energy that has flowed from the EV to the EVSE connection point.
Reference condition
Operating condition prescribed for evaluating the performance of a measuring instrument or measuring system or for comparison of measurement results. [OIML D11:2013, 3.17]
Reverse (energy) flow
For positive direction only EVSE, direction of flow in the opposite direction to positive.
Starting current (Ist)
Lowest value of current specified at which the EVSE should register electrical energy at unity power factor and, for poly-phase EVSE, with balanced load.
Part of a device having a recognizable function of its own.
The rate at which electricity is delivered or received to an EV. In this document tariff and unit price are equivalent.
Test constant
A factor having units of whr/pulse that can be applied to the test pulse so that the value of the measurement can be determined.
The process of authorizing, connecting to the electric vehicle, delivering/receiving energy, terminating the delivery, presenting the information relevant to the process to the customer, and transmitting and receiving acknowledgement of any billing information.
Transitional current (Itr)
Value of current at and above which the EVSE is specified to lie within the smallest maximum permissible error of the EVSE.
Voltage (U)
RMS value of the electrical voltage supplied to the electric vehicle at the connection point.
Voltage circuit
Connections, components, wiring and cables of the EVSE which provide voltage to the electric vehicle.

5.0 Administrative

At least one sample EVSE must be submitted for approval of type evaluations. The sample must be substantially the same as the production device. Any differences must be clearly identified. Measurement Canada will determine suitability of a sample as being representative of a production model.

Additional samples may be requested in order to evaluate any characteristics that are determined to be significant to the metrological or operational characteristics of the EVSE.

The following information must be provided with the application for approval:

  1. A description of the EVSE including detailed specifications relating to construction, assembly, adjustment, internal operation of the instrument, safety devices and self adjusting mechanisms.
  2. Sales literature, photographs, drawings and documents intended for users, including instructions for installation and preparation of the instrument for service.
  3. Operating, maintenance and repair manuals.
  4. Test data which confirms that the EVSE meets all applicable requirements of these specifications.
  5. Any other information deemed necessary and requested by Measurement Canada.

If deemed necessary Measurement Canada may also request any other information including:

  1. Published papers describing the principle of operation of the EVSE.
  2. Assembly drawings, layouts, schematic diagrams, software algorithms and software documentation. Additional details relating to software are contained in S-EG-05.
  3. Testing procedures for verification purposes.

Equipment, material and services that may be required to examine or test the EVSE may be requested and must be provided or made available as needed. Materials that need to be handled as protected commercial information must be identified.

6.0 Technical

6.1 General requirements for design composition and construction

The EVSE design and construction must be suitable for the intended purposes and expected service conditions.

The EVSE must be designed and constructed to minimize the risk of electrical shock and fire.

All insulating materials used must be non‑hygroscopic and must not release gases or vapours inside the EVSE.

The quality of dielectric properties of the EVSE and any incorporated devices must be capable of being maintained for the in-service life of the device under normal conditions of use.

The EVSE must be designed to maintain an adequate stability of its metrological characteristics over its verification period.

6.1.1 Devices capable of servicing more than one vehicle

Devices that are capable of servicing more than one vehicle must comply with all applicable technical and metrological requirements for each EV connection point available at the EVSE.

6.2 Nameplates

The EVSE must be equipped with a nameplate that is permanently affixed to a permanent part of the device.

Nameplates must be readily visible from the outside of the device.

The EVSE may be equipped with an auxiliary nameplate to facilitate additional nameplate marking requirements.

The auxiliary nameplate must be accessible for viewing with the EVSE installed.

6.2.1 Nameplate markings

All EVSE markings must be permanent, clear and easily visible.

The following information is required:

  1. Name or mark of manufacturer
  2. Type or designation
  3. Serial number
  4. Measurement Canada approval number
  5. Rated input voltage or voltages
  6. Rated output currents (minimum, maximum, transitional, and starting)
  7. Operating temperature range if the operating range is different from ‑40°C to +53°C. This is applicable to devices that may be used indoors or in temperature-controlled locations. This requirement may be satisfied through physical marking or via electronic display
  8. Test constant (if applicable)
  9. MMQ (minimum measured quantity)

Voltage rating for ancillary devices, if different than the EVSE, must be indicated on the nameplate or auxiliary nameplate as applicable.

6.3 Sealing

The EVSE must be designed and constructed to facilitate the placement of a seal or seals that prevent access to metrological adjustment or configuration and which are not secured by other approved means.

EVSE transactional and measurement data must not be alterable when the device is under seal.

The seal provision must be such that the seal cannot be disturbed when installing the EVSE.

Any terminal cover plate(s) must be separately sealable from the main EVSE seal(s).

EVSE software must comply with the requirements of S-EG-05 and S-EG-06 as applicable.

6.3.1 Sealing of cables

If the EVSE has integral external connecting cables, those cables must be sealed.

An EVSE that applies corrections to compensate for energy loss introduced by parts comprising a cable and connector mounted between the position at which the energy is measured and the connecting point shall either

  1. Ensure those parts are not replaceable and secured by an appropriate hardware seal; or
  2. If the parts are intended to be replaceable while the EVSE is under seal, the replacement parts shall comply with the following:
    1. they shall be identical in every respect to the originally verified parts;
    2. they shall be identified on the type approval certificate as replaceable;
    3. they shall include as a minimum the following markings readily viewable and located on the parts or assembly, if parts are combined:
      • approval number/identifier;
      • manufacturer's name or trademark;
      • manufacturer model;
      • any other relevant marking as needed to distinguish between similar unapproved devices.
    4. The above markings must also be documented in the Notice of Approval.

6.4 Suitability for use

The EVSE must not have any means to allow measured energy to be diverted between point of measurement and the EV.

The EVSE must not register energy when there is a break in the connection with the vehicle. A transaction must be automatically terminated in the event of an unauthorized break in the connection to the vehicle.

If an EVSE is capable of receiving electrical energy from the vehicle, then:

  1. The client interface must be capable of displaying all necessary information related to the transactions in both directions.
  2. The EVSE must be equipped with registers for energy flow in each direction.
  3. The accuracy requirements are applicable to both directions.
  4. All other requirements are applicable to this kind of transaction as well.

6.4.1 Equipment capacity

An EVSE must conspicuously indicate on each face the maximum rate of energy transfer (i.e., maximum power e.g. 7kW) with each unit price offered.

6.4.2 Transaction-related information

The EVSE memory, or equipment on the network supporting the EVSE, must retain information on the quantity of energy dispensed and the sale price totals during power loss. Unit price

An EVSE must be capable of indicating on each face the tariff at which the EVSE is set to compute or to dispense at any point in time during a transaction. Selection of tariff

When electrical energy is offered for sale at more than one tariff through an EVSE, the selection of the tariff must be made prior to delivery through a deliberate action of the purchaser to select the tariff for the transaction. Except when the conditions for multiple tariffs have been approved by the customer prior to the sale, a system must not permit a change in tariff during delivery of electrical energy.

Note: When electrical energy is offered at more than one tariff, selection of a tariff may be through the deliberate action of the purchaser: 1) using controls on the EVSE; 2) through the purchaser's use of personal or vehicle-mounted electronic equipment communicating with the system; or 3) verbal instructions by the customer. EVSE money-value computations

An EVSE that provides total sale price must compute the total sales price at any single‑purchase unit price for which the electrical energy being measured is offered for sale at any delivery possible within either the measurement range of the EVSE or the range of the computing elements, whichever is less.

6.5 Reset to zero

The EVSE must be capable of being reset to an unambiguous zero registration for the current transaction before the start of any charging event for which a charge is to be applied.

The reset to zero function must be disabled while a transaction is ongoing.

6.6 Energy registration

The EVSE must have one or more registers for the energy delivered or received to or from an electric vehicle for a transaction. Transaction registers must be reset to zero at the beginning of a new transaction.

Stored values in electronic registers must be retained during a loss of power and must be capable of being retrieved upon restoration of power.

Stored values must not be overwritten until a transaction is completed.

The register must be capable of storing and displaying an amount of energy sufficient to ensure that no roll over will occur during a transaction. This capability for storage and display applies to all registers relevant for billing including delivered and received energy registers for bidirectional EVSE and tariff registers for multi-tariff EVSE.

In the case of electronic registers, the minimum retention time is until the transaction is finalized or cancelled.

If electronic indicating devices have segments, then the EVSE must be provided with a display test that switches all the display segments on then off for the purpose of determining whether all display segments are working.

6.7 Storage of data, transmission via communication systems

6.7.1 General

The following requirements apply to measurement values used at another place than the place of measurement or at a later time than the time of measurement, and may be transmitted by the EVSE (electronic device, sub-assembly) and stored or transmitted in an insecure environment before they are used for legal purposes:

  • The measurement value stored or transmitted must be accompanied by all relevant information necessary for future legally relevant use.
  • The data must be protected by software means to guarantee the authenticity, integrity and, if necessary, correctness of the information concerning the time of measurement. The software that displays or further processes the measurement values and accompanying data must check the time of measurement, authenticity and integrity of the data after reading them from the insecure storage or after receiving them from an insecure transmission channel. If an irregularity is detected, the data must be discarded or marked unusable.
  • Private keys employed for protecting data must be kept secret and secured in the EVSE. The ability to input or read these keys must be available only when the EVSE is not sealed.

Software modules that prepare data for storing or sending, or that check data after reading or receiving, belong to the legally relevant software part.

6.7.2 Automatic storing

When data storage is required, measurement data must be stored automatically when the measurement is concluded, i.e. when the final value has been generated. When the final value is from a calculation, all data that are necessary for the calculation must be automatically stored with the final value.

The storage device must have sufficient permanency to ensure that the data are not corrupted under normal storage conditions. There must be sufficient memory storage for all unsettled transactions.

Stored data may be deleted if the transaction is settled.

Note: This does not apply to the cumulative register and approved event logger data.

6.7.3 Data transmission

The measurement must not be influenced by a transmission delay.

If network services become unavailable, legally relevant measurement data must not be lost.

6.8 Display

An EVSE must be capable of displaying all legally relevant data. The display capability can be provided using a local display or a remote display that complies with the requirements of 6.8.1

For each transaction, the EVSE must be capable of displaying the total amount of energy delivered to the load in kWh units.

The display of any decimal fractions must be clearly indicated.

The price per unit of measurement must be clearly visible if the EVSE is capable of presenting a total price for a single transaction based solely on units of energy delivered and the applied price per unit.

A local display used to present legally relevant data must be visible from the outside of the EVSE under normal conditions of use.

Local displays must not be significantly affected by exposure to normal operating conditions over the maximum duration of the EVSE's lifetime.

6.8.1 Remote displays

Where an EVSE includes a non-local client interface to provide the end user with access to legally relevant data, the following minimum requirements must be fulfilled:

  • The EVSE must be provided with communication means to send out all necessary legally relevant data.
    • Communication means and data transportation for remote displays must comply with the security requirement of section 6.7 above
  • All transported, legally relevant data must be secured by the EVSE using state-of-the-art cryptographic means.
    • Examples of appropriate cryptographic means are published by institutes such as NIST, BSI, etc. These means may be e.g. AES data in 128-bit blocks using 128, 192 or 256 bit. OIML D 31:2019 General requirements for software controlled measuring instruments includes information on the application of cryptographic means to software and data transmission in legal metrology.
  • Legally relevant data must be made accessible to the end user together with all information required to check the authenticity, using fit-for-purpose technical means that are not part of the EVSE.

6.8.2 Agreement between indications

All quantity, unit price and total price indications within a measuring system must agree for each transaction.

6.9 Printer

When an EVSE is equipped with means for printing the measured quantity, the printed information must agree with the indications on the EVSE for the transaction, and the printed values must be clearly defined.

Any delivered, printed quantity must include an EVSE identification number that uniquely identifies the EVSE from all other EVSEs within the seller's facility, the time and date, and the name of the seller. This information may be printed by the EVSE system or pre-printed on the ticket.

6.10 Testability

The EVSE must provide legally relevant energy data for testing purposes that is processed with a resolution of 0.0001 kWh or better and where the least significant digit increments by 1.

A pulse output is not required for testing; however, if a pulse output is available, the energy represented by the pulse train during a transaction must agree with that displayed on the client interface within one increment of the least significant digit.

6.11 Transactions

When settlement takes place at a later moment in time than the completion of the transaction, all legally relevant data necessary to settle a transaction must be stored in the EVSE and available for display to the user until it has been transmitted for settlement and an acknowledgement received.

6.12 Multiple tariffs

EVSE that can apply multiple tariffs during delivery must meet the following requirements:

  1. They must be able to measure and store data relevant for billing.
  2. The EVSE must be capable of maintaining storage of this data until the transaction is settled.
  3. The sum of all energy registered in multi-tariff registers must be equal to the total energy transferred during the transaction.
  4. Only one multi-tariff register can be active at any period of time during a transaction.
  5. For each part of the transaction, the following must be clear:
    1. The amount of energy transferred.
    2. The time interval over which the energy was transferred, with start and stop times.
    3. The direction of energy transfer, if applicable.
    4. The unit price that was applied.

6.13 Power outage

In the event of a supply power outage:

  1. The transaction must be paused at the time of the supply power outage.
  2. Once power is restored, the following options are allowed:
    1. If the EVSE is able to determine it is connected to the same vehicle before and after the supply power outage, the EVSE may continue charging without additional authorization and the transaction that was in process can complete normally.
    2. If the EVSE is NOT able to determine it is connected to the same vehicle before and after the supply power outage, the EVSE must terminate the transaction at the point that the power failed:
      1. The EVSE may complete the transaction without including any electricity energy charges for the charging session, or
      2. The EVSE may complete the transaction, charging the customer for only the services provided up to the point of power failure. In this case, all requirements for a completed transaction apply.

For EVSEs in parking areas where vehicles are commonly left for extended periods, the information needed to complete any transaction in progress at the time of the power loss must be determinable through one of the above means for at least eight hours.

6.14 Clock times

Clock times used in transactions must be accurate to ±15 seconds with respect to National Research Council of Canada (NRC) official time (https://nrc.canada.ca/en/web-clock/) or an equivalent national time standard such as United States National Institute of Standards and Technology (NIST) internet time service (https://www.nist.gov/pml/time-and-frequency-division/time-distribution/internet-time-service-its).

6.15 Totalizers for EVSE systems

EVSE systems must have a totalizer that maintains a cumulative registration of all delivered energy. Totalizer information must be protected and unalterable when the EVSE is under seal. Totalizer information must be readily available on site or via internet access.

7.0 Metrological requirements

7.1 Units of measurement

The units of measurement for electrical energy delivered or received by an EVSE must be one of the following units: Wh, kWh, MWh, GWh.

7.2 Rated operating conditions

Rated operating conditions are specified in Table 1.

Table 1: Rated Operating Conditions
Condition or Influence Quantity Values, Ranges
Frequency .95fnom ≤ f ≤1.05 fnom
Voltage For each Unom, 0.9 times lowest Unom to 1.1 times highest Unom

Imaxis to be specified by the manufacturer.

  • Iminis to be specified by the manufacturer.
  • Iminis to be less than or equal to Itr.
  • Istis to be specified by the manufacturer.
  • For Imax ≤ 80A: , Itr≤5.0A
  • For Imax > 80A: Itr≤0.10 Imax
Power factor ≥0.9
  • −40ºC - +53ºC
  • Or as specified by manufacturer.
Humidity and water

With respect to humidity, the manufacturer must specify the environment class for which the system is intended:

Enclosed locations where the instruments are not subjected to condensed water, precipitation, or ice formations.
Enclosed locations where the instruments may be subjected to condensed water, to water from sources other than rain and to ice formations.
Open locations with average climatic conditions.
Harmonics The EVSE must operate properly when the supply voltage distortion is less than 10 % and load current distortion is less than 3% at all harmonics indices.
Load balance All loads must be balanced.
MMQ MMQ must not be greater than 0.1 kWh
If no MMQ is marked the maximum value shall be assumed

7.3 Performance requirements

7.3.1 General

Values indicated or stored in memory must not be affected by electrical, mechanical, or temperature variations, radio-frequency interference, power failure, or any other environmental influences to the extent that accuracy is impaired.

All delivered energy registration must reflect the energy delivered to the EV at the point of connection to the vehicle or a customer connected supplied cable and must not include any energy consumed by the EVSE, its cables or associated components.

All received energy registration must reflect the energy received from the EV at the point of connection to the vehicle or a customer connected supplied cable and must not include any energy consumed by the EVSE, its cables or associated components.

7.4 Repeatability

When the EVSE is subjected to multiple test loads conducted at the same load condition, the errors must be within 0.25% of each other and no result can exceed the maximum permissible error. Repeatability tests must be performed for a minimum of three consecutive runs.

7.5 Starting current (Ist)

The EVSE must start and continue to register with a load current of Ist defined in Table 1 above.

7.6 Maximum permissible errors

EVSE errors of registration at reference conditions must not exceed those given in Table 2 below.

Table 2: Maximum Permissible Errors
Current Range Power Factor Maximum Permissible Error
Ist ≤ I < Imin >0.9 ± 15%
Imin ≤ I < Itr >0.9 ± 1.5%
Itr ≤ I ≤ Imax >0.9 ± 1.0%

For devices that do not detent reverse energy flow, the maximum permissible errors are applicable for forward and reverse energy flow.

7.6.1 Influence quantities

Test conditions and procedures for influence quantities are provided in PP-E-EVSE. Temperature

The temperature coefficient of the EVSE must fulfil the requirements of Table 3 when the EVSE is otherwise operated at reference conditions.

Table 3: Limits for temperature coefficient of error
Influence Quantity Limits for temperature coefficient (%/K)
Temperature coefficient (c), over any interval of the temperature range, which is not less than 15 K and not greater than 23 K, for current ItrIImax 0.05% Error shift limits for influence quantities

When the load current is held constant at a point within the rated operating range with the EVSE otherwise operated at reference conditions, and when any single influence quantity is varied from its value at reference conditions to its extreme values defined in Table 4, the maximum percent error shift must not exceed the value identified in Table 4 for the influence quantity. The EVSE must continue to function after the application of an influence quantity.

Table 4: Error Limits for Influence Quantities
Influence Quantity Conditions Current Maximum Permissible Error Shift
Self-heating Continuous current at Imax Imax ±0.5%
Voltage variation

0.9 times lowest Unom to 1.1 times highest Unom

This requirement is also applicable to any auxiliary supply voltage, which can also be varied by up to ±10% of the nominal value.

ItrIImax ±0.7%
Frequency variation

fnom ±5%

The frequency of the auxiliary supply voltage, if applicable, must be varied simultaneously with the main supply voltage.

ItrIImax ±0.5%
Harmonics in voltage and current circuits Footnote (1)

d < 5% I

d < 10% U

ItrIImax ±0.6%
Reversed phase sequence (3-phase only) Any two phases interchanged ItrIImax ±1.5%
Continuous (DC) magnetic induction of external origin 200 mT at 30 mm from core surface ItrIImax ±1.5%
Magnetic field (AC, power frequency) of external origin. 400 A/m ItrIImax ±1.3%
Radiated, RF, electromagnetic fields f = 80 to 6000 MHz, Field strength ≤ 10 V/m ItrIImax ±2.0%
Conducted disturbances, induced by radio frequency fields f = 0.15 to 80 MHz, Amplitude ≤ 10 V ItrIImax ±2.0%
Operation of ancillary devices Ancillary devices operated with I= Itr and Imax ItrIImax ±0.33% Effects of disturbances

Test conditions and procedures for disturbances are provided in PP-E-EVSE.

The EVSE must withstand disturbances that may be encountered under conditions of normal use. When subjected to the disturbances listed in Table 5, Table 6 and Table 7, the EVSE must not exhibit an error shift greater than ±1.0% or where indicated must not exhibit any damage to the EVSE.

Electrical disturbances
Table 5: Electrical Disturbances
Disturbance Quantity Level of Disturbance Allowed Effects or Error Shift
Electrostatic discharges
  • 6 kV contact discharge
  • 8 kV air discharge
Fast transients
  • Voltage and current circuits: 2kV
  • Auxiliary circuits: 1.0 kV
Voltage dips
  • Test a: 30%, 0.5 cycles
  • Test b: 60%, 1 cycle
  • Test c: 60%, 25/30 cycles (1)
Voltage interruptions 0%, 250/300 cycles (3) ±1.0%
Surges on AC mains power lines
  • Voltage circuits: 2kV line to line, 4kV line to earth
  • Auxiliary circuits: 1kV line to line, 2kV line to earth
Short-time overcurrent 5 times Imax limited to a maximum of 3kA. No damage can occur
Impulse voltage
  • 1.5 k U (100 ≤ U < 150)
  • 2.5 k U (150 ≤ U < 300)
  • 4.0 kV U (300 V ≤ U < 600 V)
  • 4.0 kV U (U ≥ 600 V)
No damage to the EVSE
Environmental disturbances
Table 6: Environmental Disturbances
Disturbance Quantity Level of Disturbance Allowed Effects or Error Shift
Protection against solar radiation 0.76 W·m2·nm-1 at 340 nm, with cycling rig for 66 days No alteration in appearance or impairment in functionality, metrological properties and sealing
Protection against ingress of dust IP 5X, category 2 enclosure No interference with correct operation or impairment of safety, including tracking along creepage distances
Dry heat One standard temperature higher than upper specified temperature limit, 2 h ±1.0%
Cold One standard temperature lower than lower specified temperature limit, 2 h ±1.0%
Damp heat
30°C, 85%
Cyclic 25°C, 95% to 40°C, 93%
Cyclic 25°C, 95% to 55°C, 93%
No evidence of any mechanical damage or corrosion
Water H3 only, 0.07 L/min (per nozzle), 0° and 180°, 10 min No evidence of any mechanical damage or corrosion
Durability High current and/or temperature for a sustained period of time ±1.0%
Mechanical disturbances
Mechanic disturbances are intended to simulate conditions encountered during transportation. These requirements may also be eliminated from type approval if in situ testing is performed prior to an EVSE being put into service.
Table 7: Mechanical Disturbances
Disturbance Quantity Level of Disturbance Allowed Effects or Error Shift
Vibration Vibration in three mutually perpendicular axes ±1.0%
Function of the EVSE must not be impaired
Pulse shape:
peak acceleration:
30 gn,
pulse duration:
18 ms
Function of the EVSE must not be impaired