Quote from: 3SJT on January 07, 2024, 04:03:24The formulas for estimating range are by and large opaque and arbitrary. A better approach would be to provide both a speed and distance chart AND a speed and kilowatt-hour consumption chart for every vehicle showing how far the vehicle can travel and how much energy it consumes at any given speed. Options (like larger wheels) that materially affect efficiency can be displayed as an additional curve on the charts.
They don't have the budget to test every factor of choice. But EPA does have highway and city mpg, instead of just a combined range, they can show both a city range and highway range as well. A person can calculate this manually, but most won't even know where to start
QuoteAlso important would be showing an efficiency curve for COLD WEATHER, so consumers can get a good sense of how temperature impacts range or efficiency. In the same way we have been showing city/highway fuel economy figures on window stickers, EVs could show summer/winter range numbers on their window stickers.
Why only for EVs? Why not for all cars since ICE suffer from range loss too during summer and winter. Though then comes the question of if it should be done from "cold start" or "warm start"