In 2022 EPRI conducted an online survey across the United States to gather information on residential electrical panels. Initial analysis found that over 20% of respondents living in single-family homes have 100 Amp or smaller main electrical service breakers. Additionally, as less than 25% of homes across the United States are fully electric and EV penetration is still very low, many homes will be adding large electric loads as the country continues to electrify. Many small electrical services (100 A or less) could need to be upgraded to accommodate these changes.
This follow-on project aims to understand the scale of this problem more objectively by using the survey responses to build a computational model. The model calculates if main breakers will be undersized, based on NEC load calculation requirements, in a variety of partial and complete electrification scenarios.