Level 2 AC Electric Vehicle Charger Demand Response

At a Glance

Status

active

Sector

commercial, residential

Applications

plug loads

RTF analysts developed estimates of per unit technical potential for demand response for Connected level 2 Electric Vehicle (EV) Chargers. Connected level 2 chargers may reduce charging output power in response to a DR signal with a typical range of ~3-7kW per unit maximum Demand Response potential during steady state charging. Chargers can be throttled between 100%-0% output power. Chargers currently predominantly communicate via Wi-Fi or cellular service.

The primary components influencing this per unit potential are the vehicle itself, specifically the vehicle maximum power acceptance (kW), above which the vehicle will not accept a higher rate of charge. Potential impact is also affected by the charger's maximum output capacity (kW), the typical range of residential level 2 AC 240V charger output power is 3-7 kW, and finally by the charger throttled output capacity (%). A charger's throttled output capacity will reduce the per unit DR potential below 100% of 3-7kW.

Data sources used for this analysis include publicly available regional electric vehicle registration and vehicle maximum power acceptance datasets paired with literature reviews of electric vehicle charger studies, and interviews with electric vehicle charger subject matter experts and programs.

The per unit potential is calculated with the following governing equation:

$\LARGE \LARGE Residential Level 2 AC Charger Per Unit DR Potential = Steady State Charger Output Capacity(kW)\ast Charger Throttled Output Capacity (%)$

Workbook

Latest Version

Level 2 AC EV Chargers Demand Response Workbook v1.0

Level 2 AC EV Chargers Demand Response Workbook v1.0

Workbook approved at the February 2019 RTF meeting.

Date

Feb 20, 2019

Version number

1,0

Decisions

Expand All Decisions

Latest decision

Decision details

Decided

February 20, 2019

Approve Demand Response Savings Estimate

Decision Details

Approve the per unit demand response savings estimates for Networked Residential Level 2 AC EV Chargers as presented.