Presentation Details
| EV Charging Infrastructure with Solar Integration: Utility Load Impacts and Planning Implications Sneha Shanmuganathan, Bhavya Sree Boya Nayakula, Justin, Steve Goodnick, Christiana Honsberg Arizona State University, 1151 (yes) Sneha Shanmuganathan1, Bhavya Sree Boya Nayakula1, Justin 1, Steve Goodnick 1, Christiana Honsberg 1. 1Arizona State University, Tempe, AZ, USA.2Arizona State University, Tempe, AZ, USA.3Arizona State University, Tempe, AZ, USA.4Arizona State University, Tempe, AZ, USA.5Arizona State University, Tempe, AZ, USA |
Abstract
This work examines the interaction between electric vehicle (EV) charging demand and utility-scale solar generation using an infrastructure-based charging model and hourly utility data from the U.S. Energy Information Administration. Salt River Project (SRP) is used as a representative Arizona utility. EV adoption is projected using a compound annual growth rate and combined with average daily driving energy requirements to estimate total daily charging energy, which is converted into hourly EV load profiles. Charging behavior is modeled by distributing daily EV energy across three charger classes—Level 1, Level 2, and DC fast charging (DCFC)—with representative residential, workplace, and public charging windows. A baseline uniform charging case is compared with timed charging scenarios for morning, midday, evening, and overnight periods to evaluate impacts on peak demand, load variability, and net load, defined as utility demand plus EV load minus solar generation. Seasonal analysis across representative winter, shoulder, and summer months shows that conventional nighttime charging increases summer peak demand. In contrast, shifting charging to morning and midday hours aligns EV load with periods of high photovoltaic generation, reducing peak demand and mitigating midday net-load dips. The results highlight the potential for workplace and daytime charging strategies to improve grid stability and enhance solar utilization.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.