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Guideline E.5: EV-Ready

Intent

To enable and encourage a transition to lower-carbon transportation infrastructure.

Required Performance Criteria

  1. For projects designated New Construction and Major Renovations that include new or renovated parking areas as part of the project, provide Electric Vehicle Supply Equipment (EVSE) infrastructure to permit future electric vehicle charge stations based on the number of long-term parking spaces. Long-term parking is defined here as parking spaces where typical users are expected to stay more than four hours; short-term parking is defined as parking spaces where typical users are expected to stay for fewer than four hours.
    • If the project includes five or fewer total long-term parking spaces, EVSE infrastructure must be provided for at least one space.
    • If the project includes between five and 50 long-term parking spaces, EVSE infrastructure must be provided for at least 20% of long-term parking spaces.
    • If the project includes more than 50 long-term parking spaces, EVSE infrastructure must be provided for 10 spaces plus additional spaces equal to 10% of the number of long-term spaces above of 50.

    EVSE infrastructure shall be sufficient to support “Level 2” or higher charging technology. EVSE infrastructure shall consist of:

    • Dedicated space for future electrical distribution equipment to support EVSE.
    • Raceway or equivalent distribution capacity of at least 1 inch diameter, connecting each future EVSE parking space to dedicated electrical distribution location.

    Accessible parking spaces shall be given consideration when determining access to charging equipment. Projects designated Major Renovations that do not disturb parking surfaces, modify electric distribution to parking areas, or modify electrical equipment in walls or other assemblies adjacent to parking areas may be exempted from this requirement. One DC-fast charging EVSE (including full installation of the equipment) can be used in place of five Level 2 EVSE-ready spaces. If used to replace Level 2 EVSE spaces, this DC-fast charging option shall be installed in short-term parking areas, if such areas are included in the project.

Recommended Performance Criteria

  1. For New Construction and Major Renovation projects, provide EVSE infrastructure for future electric vehicle charging for all of parking areas included in the project. EVSE infrastructure shall consist of the elements outlined under E.5A.
  2. Install EVSE for at least 10% of all spaces. EVSE must be at least Level 2 to meet this guideline.
  3. Install sufficient renewable energy capacity to supply EVSE by installing or enlarging an onsite or on-campus system or by installing additional solar canopy in parking areas. Note that meeting this recommended guideline requires renewable energy capacity in addition to the renewable energy requirements of other guidelines.

During the Predesign phase, determine the project’s parking needs and the number of spaces devoted to long-term parking. Calculate the required number of spaces by using the following formulas:

If the number of long-term spaces is less than or equal to 50:

Spaces Required = (number of long term spaces) x (0.2), rounding up

If the number of long-term spaces is greater than 50:

Spaces Required = 10 + ((number of long term spaces)-50) x (0.1), rounding up

If the parking requirements change as the project progresses, update these calculations as needed. The number of spaces contributing to meeting this requirement are provided by the following:

Spaces contributing to meeting this requirement = ((Number of ESVE Ready Spaces) + 5) x (Number of installed DC Fast Charging Points)

Note that the Number of ESVE Ready Spaces in the above formula excludes those spaces contributing to the Number of installed DC Fast Charging Points.

Ensure that team members responsible for planning parking areas are aware of this requirement and that access to future EVSE is provided for accessible parking. Ensure that electrical distribution capacity or utility interchange locations have been identified and sized appropriately for the anticipated load.

Document location of future EVSE and EVSE infrastructure in site and electrical design documents, including identifying future panel locations in mechanical spaces. Label this future panel location and reserve for future installation. Label raceway terminals in mechanical spaces to facilitate future installation. Provide electrical and site plan diagrams listing parking areas, noting long-term parking and highlighting locations of EVSE infrastructure.

Larger diameter raceways may be used to provide equivalent electrical distribution capacity to multiple spaces according to electrical code capacity calculations.

Design:

  • 5A: Site plan identifying preliminary location of EVSE-ready spaces and calculation of number of required spaces.

Final Design:

  • 5A: Site plan identifying final location of EVSE-ready spaces, calculation of number of required spaces and electrical drawings identifying raceway layout and future panel or other electrical distribution location.
  • 5B: Site plan demonstrating all spaces are EVSE-ready (the same documentation may be uploaded under E.5A).
  • 5C: Documentation of purchase of charging infrastructure sufficient to supply 10% of spaces identified under E.5A.
  • 5D: Site plan and electrical diagram documenting renewable energy supply to EVSE location and documentation of anticipated EVSE load and estimate of renewable energy generation.

‘Energy Updates in B3: Part 1’ Training Session Recording (YouTube Link)

‘Energy Updates in B3: Part 1’ Training Session (PDF)

Drive Electric Minnesota, Becoming EV Ready: https://www.driveelectricmn.org/becoming-ev-ready/

Level-2 Parking

Level-2 parking is EVSE supplied through 240V service, typically in the range of 16 to 30 amps.

Long-Term Parking

For the purposes of this guideline, long-term parking is used to define parking spaces which the typical user will stay in excess of four hours. If the parking area serves several user types, those with the lengthiest stay shall be considered.

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