Here’s Why EV Range Estimates (Esp. Tesla’s) Are Wrong Much Of The Time In The USA
The SAE and Car & Driver have released a report that shows why the EPA range numbers for electric cars are often inaccurate, especially Tesla’s estimates.
Shortly after I took possession of my Tesla Model Y, my wife and I took a road trip. The car as delivered was rated by the EPA as having 326 miles (525 km) of range. We charged up to 100% prior to starting out, but by 250 miles, we were down to 10% SOC and the touchscreen was sending us urgent messages about finding a charging station soon. So, where did the other 76 miles of range I was supposed to have go?
Being new to the Tesla experience, I began to rationalize why my first road trip wasn’t going as planned. Was I driving too fast on the highway? (In Florida, if you don’t go 85 on the Interstate, you risk getting run over by school buses, cement mixers, and such.) Maybe the A/C was consuming more power than I expected? Maybe I was not smooth enough on the throttle? The one thing I never considered was that the method used by the EPA to come up with its EV range calculations was inaccurate.
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There a number of reasons why the EPA numbers don’t match real-world experience. For one, the EPA standard is calculated using a formula that is weighted 55% in favor of city driving. This inflates the range estimates, making it harder to match what happens in the real world. It also confers a benefit on electric cars because they harvest some energy via regenerative braking during stop-and-go driving. The SAE proposes publishing both city and highway range numbers separately, much the way the estimates for conventional cars are shown separately.
Second, while the Car and Driver highway range testing protocol uses real cars driving on real roads at a constant 75 mph, the EPA test cycle is variable, with the speed increasing and decreasing over the course of the test.
On Car and Driver‘s 75-mph highway test, more than 350 internal combustion vehicles averaged 4.0 percent better fuel economy than what was stated on their window stickers. But the average range for an EV was 12.5 percent worse than the window sticker numbers, the magazine says. Uh oh.
The SAE and Car and Driver have released a report that shows why the EPA range numbers for electric cars are often inaccurate.
cleantechnica.com
babylonbee.com
Facts don't matter, logic doesn't matter. Just how enraged they are by the very existence of them is amusing. 
