Electric Vehicle Supply Equipment (EVSE) Key Product Criteria

Effective Date: December 27, 2016

General Requirements

Each EVSE submitted for ENERGY STAR certification shall be Listed by a Nationally Recognized Testing Laboratory (NRTL) for safety. Dual Input Level 1 and Level 2 EVSE shall meet all requirements and report information in both configurations.

No Vehicle Mode Requirements

Note: These requirements refer to the SAE J1772 State A.

Measured No Vehicle Mode power (PNO_VEHICLE) shall be less than or equal to the Maximum No Vehicle Mode Power Requirement (PNO_VEHICLE_MAX), as calculated below, subject to the following requirements.

  1. For products with ABC enabled by default, the average No Vehicle Mode power in high and low illuminance conditions shall be used in place of PNO_VEHICLE, above.
  2. For products capable of network connection with multiple protocols (e.g., Wi-Fi and Cellular), only the allowance for the protocol enabled during testing shall be claimed.

Calculation of Maximum No Vehicle Mode Power Requirement

PNO_VEHICLE_MAX = 2.6 +  PWAKE + PDISPLAY

Where:

  • PNO_VEHICLE_MAX is the Maximum No Vehicle Mode Power Requirement;
  • PWAKE is the No Vehicle Mode power allowance for the network connection with wake capability enabled during testing; and
  • PDISPLAY is the No Vehicle Mode power allowance for a High Resolution Display enabled during testing.

No Vehicle Mode Power Allowances

Product Function

No Vehicle Mode Power Allowance
(watts, rounded to the nearest 0.1 W for reporting)

In-use Wi-Fi or Ethernet Interface with Wake Capability
(PWAKE)

1.0 / n

Where:

  • n is the number of outputs.

In-use Cellular with Wake Capability (PWAKE)

2.0 / n

Where:

  • n is the number of outputs.

Other In-use LAN (Local Area Network) Interface with Wake Capability (PWAKE)

1.0 / n 

Where:

  • n is the number of outputs.

In-use High Resolution Display (PDISPLAY)

[(4.0 x 10-5 x  x A) + 119 x tanh(0.0008 x [A - 200.0] + 0.11) + 6.0]/n

Where:

  • A is the Screen Area in square inches;
  • is the Maximum Measured Luminance of the Display in candelas per square meter, as measured in Section 4) C) of the ENERGY STAR Test Method for Determining Electric Vehicle Supply Equipment Energy;
  • tanh is the hyperbolic tangent function; and
  • n is the number of outputs.

Example: For a single-output EVSE with a maximum measured luminance of 300 candelas/m2 and a 5×5 inch screen, the allowance for the in-use display would be 2.7 watts.

Partial On Mode Requirements

Note: These requirements refer to the SAE J1772 State B1 or State B2.

Measured Partial On Mode power (PPARTIAL_ON) shall be less than or equal to the Maximum Partial On Mode Power Requirement (PPARTIAL_ON_MAX), as calculated below, subject to the following requirements.

  1. For products with ABC enabled by default, the average Partial On Mode power in high and low illuminance conditions shall be used in place of PPARTIAL_ON, above.
  2. For products capable of network connection with multiple protocols (e.g., Wi-Fi and Cellular), only the allowance for the protocol enabled during testing shall be claimed.

Calculation of Maximum Partial On Mode Power Requirement

PPARTIAL_ON_MAX = 2.6 + PWAKE + PDISPLAY

Where:

  • PPARTIAL_ON_MAX is the Maximum Partial On Mode Power Requirement;
  • PWAKE is the Partial On Mode power allowance for the network connection with wake capability enabled during testing; and
  • PDISPLAY is the Partial On Mode power allowance for a High Resolution Display enabled during testing.

Partial On Mode Power Allowances

Product Function

Partial On Mode Power Allowance
(watts, rounded to the nearest 0.1 W for reporting)

In-use Wi-Fi or Ethernet Interface with Wake Capability
(PWAKE)

1.0 / n

Where:

  • n is the number of outputs.

In-use Cellular with Wake Capability (PWAKE)

2.0 / n

Where:

  • n is the number of outputs.

Other In-use LAN (Local Area Network) Interface with Wake Capability (PWAKE)

1.0 / n

Where:

  • n is the number of outputs.

In-use High Resolution Display (PDISPLAY)

[(4.0 x 10-5 x  x A) + 119 x tanh(0.0008 x [A - 200.0] + 0.11) + 6.0]/n

Where:

  • A is the Screen Area in square inches;
  • is the Maximum Measured Luminance of the Display in candelas per square meter, as measured in Section 4) C) of the ENERGY STAR Test Method for Determining Electric Vehicle Supply Equipment Energy;
  • tanh is the hyperbolic tangent function; and
  • n is the number of outputs.

Example: For a single-output EVSE with a maximum measured luminance of 300 candelas/m2 and a 5×5 inch screen, the allowance for the in-use display would be 2.7 watts.

Idle Mode Requirements

Note: These requirements refer to the SAE J1772 State C.

Measured Idle Mode power (PIDLE), shall be less than or equal to the Maximum Idle Mode Power Requirement (PIDLE_MAX), as calculated below, subject to the following requirements.

  1. For products with ABC enabled by default, the average Idle Mode power in high and low illuminance conditions shall be used in place of PIDLE, above.
  2. For products capable of network connection with multiple protocols (e.g., Wi-Fi and Cellular), only the allowance for the protocol enabled during testing shall be claimed.

Calculation of Maximum Idle Mode Power Requirement

PIDLE_MAX = (0.4 x Max Current) + 2.6 + PWAKE + PDISPLAY

Where:

  • PIDLE_MAX is the Maximum Idle Mode Power Requirement, in watts;
  • Max Current is the Nameplate Maximum Output Current, in amperes;
  • PWAKE is the Idle Mode power allowance for the network connection with wake capability enabled during testing; and
  • PDISPLAY is the Idle Mode power allowance for a High Resolution Display enabled during testing.

Idle Mode Power Allowances

Product Function

Idle Mode Power Allowance
(watts, rounded to the nearest 0.1 W for reporting)

In-use Wi-Fi or Ethernet Interface with Wake Capability
(PWAKE)

1.0 / n

Where:

  • n is the number of outputs.

In-use Cellular with Wake Capability (PWAKE)

2.0 / n

Where:

  • n is the number of outputs.

Other In-use LAN (Local Area Network) Interface with Wake Capability (PWAKE)

1.0 / n

Where:

  • n is the number of outputs.

In-use High Resolution Display (PDISPLAY)

[(4.0 x 10-5 x  x A) + 119 x tanh(0.0008 x [A - 200.0] + 0.11) + 6.0]/n

Where:

  • A is the Screen Area in square inches;
  • is the Maximum Measured Luminance of the Display in candelas per square meter, as measured in Section 4) C) of the ENERGY STAR Test Method for Determining Electric Vehicle Supply Equipment Energy;
  • tanh is the hyperbolic tangent function; and
  • n is the number of outputs.

Example: For a single-output EVSE with a maximum measured luminance of 300 candelas/m2 and a 5×5 inch screen, the allowance for the in-use display would be 2.7 watts.

Connected Functionality

This section includes connected criteria for ENERGY STAR certified EVSE. EVSE that meet the connected functionality criteria shall be capable of supporting Demand Response (DR) (e.g., via software updates or integration with an external service). Compliance with this section is optional. ENERGY STAR certified EVSE that comply with all connected criteria will be identified on the ENERGY STAR website as having ‘Connected’ functionality.

Note: EPA recommends that once DR capability is added, that the EVSE be capable of directly or indirectly supporting both signals-based DR as well as price response. As appropriate, EPA further encourages connected functionality that enables direct control by the Load Management Authority as well as integration with commercial EVSE management applications and/or energy management systems.

Brand owners are encouraged to engage with utilities to ensure DR capabilities align with utility needs and DR program designs.

Grid Communications: The product shall include a communication link that is capable of supporting DR. This link shall use open standards, as defined in this specification, for all communication layers.

Open Access: To enable interconnection with the product over the communication link, an interface specification, application programming interface (API) or similar documentation that is intended to enable DR functionality shall be made readily available.

Note: Products that enable direct, on-premises, open-standards based interconnection are preferred, but alternative approaches, where open-standards connectivity is enabled only with use of off-premise services, are also acceptable.

Consumer Override: The product shall be capable of supporting DR event override-ability by consumers.

Capabilities Summary: A ≤4000 character (approximately 500 words or less) summary description of the EVSE system’s and/or associated Service Provider’s DR capabilities/services shall be submitted.

1. In this summary, the following shall be included:

i. DR Support, e.g., implemented, planned for CY2017.

ii. For products that do not ship with DR capabilities enabled, the steps needed to enable these capabilities.

2. In this summary, EPA recommends noting the following, as applicable:

iii. DR services that the product has the capability to participate in such as load dispatch, ancillary services (including V2G), price notification and price response.

iv. Whether the EVSE can be directly addressed via the interface specification, API or similar documentation.

v. Support for locational DR, e.g., to ZIP code(s), feeder(s), or to EVSE endpoints specified by the Load Management Entity.

vi. List open communications supported by the EVSE, including applicable certifications.

vii. Feedback to Load Management Entity, e.g., verification/M&V, override notification.

viii. Response configurability/flexibility by the consumer and/or Load Management Entity.

ix. Measures to limit consumer impacts, if any.