With 10% penetration, EVs could shift all residential peak load to night, analysis of SoCal Ed finds

Source: By Robert Walton, Utility Dive • Posted: Thursday, October 17, 2019

Utilities see potential in using EVs as grid assets, but also must consider technical concerns, manufacturer warranties and range complexities.

Vehicle-to-grid integration “has gotten a lot of hype over the last few years, but in terms of providing value to the grid we still have some work to do to prove that out,” Lang Reynolds, Duke Energy’s director of electrification strategy, told Utility Dive.

The Jackson Associates study finds the financial implications of that integration could be large, with a potential annual savings of $560/EV customer if SCE reduced peak residential load through vehicle batteries.

“We were surprised both at the relatively small 10 percent EV market saturation required to completely clip the SCE residential peak and the large annual savings … even after paying for nighttime recharging,” Jackson Associates President Jerry Jackson said in a statement.

Utilities should shift from defensive “managed charging” strategies to “an offense strategy that draws on EV battery storage during peak hours with overnight recharging,” according to Jackson.

Credit: Jackson Associates

“Expected rapid growth of the EV market along with the significant benefits shown here of even limited EV market saturation highlight the urgency of developing appropriate utility programs, EV technologies and a supportive regulatory framework,” Jackson said.

SEPA also concluded increased EV deployment could result in a “trillion dollar EV opportunity for prepared and proactive utilities.”

SEPA’s report recommends utilities identify opportunities to incorporate load management, including managed charging and rate design, and adopt open charging protocols to “help provide alignment around charging industry standards and load management to leverage EVs as a grid asset.”