Living With an EV for a Week – Day Three (and why MPGe is stupid)

Day three dawned with a nearly full battery, the exact level seemed unimportant to me. Perhaps it's the Range Anxiety patch I ordered online for three easy payments of $9.99, or my new-found confidence in tripping across EV stations. Either way I decided bold action was required. I set the climate control to 68 and headed up the hill. How far would by battery get me today? That's a good question. Since trip computers aren't intelligent, they can't make adjustments for terrain like we can. For instance, I know that the freeway without traffic that's flat the whole way is the efficient route while the possibly shorter mountain road is going to consume more energy. There's a problem with Zippy Zappy however, she doesn't display "fuel economy" in terms of the fuel that's actually being used, instead the silly display shows you how many Miles Per Gallon equivalent you're getting. MPGe is stupid. My apologies for calling the Fiat 500e the most efficient EV available, I was misinformed and I must fall on my sword. The Scion iQ EV is the most efficient EV with a combined rating of 121 MPGe. There's that MPGe thing gain. Everyone say it with me: EVs don't drink gasoline. What would be helpful to me as I'm driving down the road is how much energy it takes to move my car one mile, just like a normal car. What I want is mi/kWh. The LEAF and s few other EVs give you this information, but there is no standard and with the EPA heading off in the weeds with MPGe it's only complicating things. If you bought electricity in MPGe it would be different, but we don't. The reason MPGe exists must be to confuse everyone, and confuse it does. I have seen Chevy Volts advertised as 98 "MPG" (without the e), and when people look at the window stickers of EVs, they ask, "but I thought it was electric?" Starting with the 2012 model year cars needed to display a standard way of communicating efficiency to the customer. Because the EPA gets wrapped up in their own red tape easily, they decided that the American public was too stupid to think in terms of mi/kWh or kWh/100 miles. So what they did was they sat down and calculated how much energy burning one gallon of gasoline would produce. The answer was 116,090 BTU or 34.02 kWh per US gallon. Then for some reason the EPA picked 33.7 for the official exchange rate. That's lovely, but again I ask: where exactly do I buy electricity in MPGes? Nowhere, that's where. We can take something away from this MPGe nonsense however, it is obvious how inefficient internal combustion engines are. If one gallon is equal to 34.02kWh, ZZ's 24kWh battery pack "holds" around 7/10ths of a gallon of "gallon equivalent" and will transport you 80-95 miles. If something running on real gasoline was that efficient, that  20 gallon gas tank would get you from California to Florida on one tank. With some range experience under my belt I decided to set the cruise control to 74, climate control set to 68 and zipped to work like I was driving any other car. The only thing to report is I got the same scornful looks from the LEAF drivers as I did in any gasoline car as I passed them in the pack of commuters eager to get to work on time. There's just one thing, ZZ has a top speed of 88 MPH instead of the 130 you can do in the Abarth or the 120 in the regular $15,995 500 Pop. Despite having a stout 111 HP and 147 lb-ft of twist, the A/C motor under the hood of the little Fiat can only spin so fast. The same goes for gasoline engines of course, but they have multi-speed transmissions and torque converters, that all reduces efficiency. Instead the "single" speed transmission in most EVs is nothing more than a reduction gear and a differential. Need to go in reverse? Just spin the motor backwards. Since motors deliver excellent torque at near zero RPM, there's no need for an efficiency robbing torque converter. There are compromises when picking that reduction gear ratio and the Fiat engineers favored efficiency, hence the 88 MPH max speed. The Tesla Model S uses a motor that can spin faster (it's a more expensive car so it can have a more precision motor) and since it competes with the Germans in the luxury market, a 130MPH top speed was required. I'm not sure how fast that Tesla's motor spins at 130 but it's bound to be singing. When I arrived, my newly discovered charging station was once again available, so I plugged in and sucked up $7.84 worth of electrons (16 kWh) in two and a half hours. My battery was full before lunch time. For lunch I jammed three passengers in the wee Fiat, depleted my battery by 10% by engaging in EV shenanigans (instant torque makes for entertaining one-wheel-peel) and figured I'd top off the battery the slow way with the free 120V juice from the office. Except I forgot to actually plug the car in. My bad. I discovered my error when I went to unplug ZZ from her umbilical. Never mind, 90% is enough to return home and then some, so I cranked the A/C (it was 89 degrees) and took I-280 home as a happy medium between the flat and efficient US-101 with bad traffic and the traffic-free but decidedly inefficient Highway 35. When I got home I had 33% of my battery left and I was informed that we were to go and visit my cousin-in-law. No problem, a quick numbers game in my head said that 33% plus a 20 minute stop at the 240V charger at the grocery store on the way (had to get some wine anyway) and mooching off their power with the 120V cord once we arrived would leave us with battery to spare. Unfortunately when we got to the store my "Plug Rage" reared its ugly head once more. I had 30% of my battery left (thanks to the 11 miles to the store being mostly down-hill) and there sucking off the only electric teat in the lot was a Ford C-Max Energi. I was incensed, she didn't need the power as much as I needed it. Didn't she know there was a gas station around the corner? Here she is sucking down the electrons I needed to get home when she could just burn some gasoline and we could all get home. We started the errand running and I kept a watchful eye on the ChargePoint app (it really needs a feature to notify you when a station becomes available now that 99% of stations on the map can no longer be reserved). My waiting was rewarded and I got a 25 minute charge. After a 3-hour dinner party and 3.1 kWh courtesy of my cuz, we made it back up the hill with the car flashing, beeping, whining and whimpering that it had 14% of its battery remaining. This made us ask: what happens when you run out? I wasn't brave enough to find out. Day three ended proving that thanks to ZZ's 6.6kW charger you can put over 175 miles on your 500e in a day without too much stress. Charge at home, charge before lunch, charge after lunch, charge at the grocery store. By thinking of your EV as a 1990s cell phone where you were always hunting for a charge, you'll be fine. Just ask me. Sadly we will have to wait 21 hours for day four to dawn because I don't own a Level 2 charger.   from The Truth About Cars http://www.thetruthaboutcars.com

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