[Martinjlm]

Originally Posted by KMPrenger

There is a lot of confusion surrounding EV range, which is no surprise really. For example, I don't know the exact numbers, but the Tesla Model Y long range is rated at 320 miles I believe. I don't know exactly how they determine that range, but I do believe it includes a hefty mixture of city driving and or low speed driving. That's all fine, but I think potential owners also need to know that that range is cut pretty significantly if you hit the highway for a long trip and especially if you are going to be hitting speeds of 75 - 80 or more MPH. That alone typically will reduce range by at least 20% from the stated 320 miles of range. Throw some hot or cold temps on top of that and now your range is reduced to maybe 220 miles or less.

See what actual owners are saying. Most are saying real world mileage is around 200 - 250 or so depending on other factors. Could be even less than that if the weather is especially harsh or better under ideal conditions. https://www.reddit.com/r/TeslaModelY..._model_y_long/

I'm not framing this as an attack on EVs. I just think EV mileage ratings should change to be more like a gas powered vehicle. I don't have the solution for that, but I just wonder if it would make more sense to have two or three ratings. Perhaps a "max" range, a "city" or "mixed" range, and then finally a "highway" range. Other factors would still lower these numbers, but at least then it would be more in line with ICE ratings, which we are all used to.

The attached image is what the EPA shows for the Model Y Long Range. Who the heck even knows that this means? Then it says "330 miles of total range", but that is missleading (not intentionally...at least I hope) for those that don't understand this, and I'm confident in saying most people would not understand this. This needs to be simpler.

MPGe has been a head scratcher since the first Prius. MPGe means miles per gallon equivalent. The original idea was to provide a way for buyers to compare hybrids / EVs to gasoline / diesel powered vehicles at an MPG level. It basically says (using the label you showed) the energy required to power the Model Y Long Range on the fuel economy cycle is the equivalent to the amount of energy it would take a gas powered vehicle in the same class if that gas vehicle averaged 122 miles per gallon of gas.

As for how the range is calculated, here’s the two processes used. Manufacturer’s choice on which method. All testing on dyno.

• Battery is charged to 100%
• It is driven on the city cycle until it comes to a complete stop and the distance is recorded
• The battery is charged to 100%
• The vehicle is driven on the highway circuit until it stops. And the miles driven is recorded.
• Or the automaker can opt to use the multi-cycle test. This is done with (4) city cycles, (2) highway cycles, and (2) constant speed cycles.
• An adjustment factor is applied to account for real-world driving issues such as more aggressive driving, HVAC usage, etc. The most typical adjustment factor is 0.7.
• To get to the label numbers a 55 / 45 city highway split is assumed. Take the test city cycle average x .7 x .55 and add the highway cycle average x .7 x .45

EVs and hybrids operate on the opposite paradigm from ICE vehicles. They get better fuel economy in city driving, worse fuel economy in highway driving.
In 8 months with a Tesla Model Y we get pretty close to the stated range in the city and about 20% lower than the stated range on the highway, depending on road speed. At 80 mph and above the range drops off fast. This only matters for us on long trips since just driving around town, when all is said and done we just plug it in and begin the next day.