HERE'S WHY YOU'RE MEASURING EV PHANTOM DRAIN WRONG

EV Channels Review

This episode of the Out of Spec Podcast delves into the complexities of EV phantom drain, challenging the common methods of measurement. Hosts Kyle Conner and Dave highlight that simply observing a drop in State of Charge (SoC) is an inaccurate way to gauge phantom drain. They explain that factors like battery temperature fluctuations and Battery Management System (BMS) sway can significantly impact SoC readings without actual energy loss. True phantom drain, defined as energy physically flowing out of the battery pack to power non-essential systems, can only be accurately measured using current clamps with all ancillary systems shut off. The discussion also touches upon why combustion-adapted EVs often exhibit lower phantom drain due to their simpler electrical architecture. The hosts emphasize that many perceived phantom drain issues are likely calibration or temperature-related, urging viewers to reconsider their measurement techniques.