After 1,158 miles on the odometer, my wife still absolutely loves her i3 BEV. Based on my experience with Tesla superchargers, I insisted on getting the optional SAE combo/CCS charging capability, but this was a bit of a leap of faith because there were hardly any CCS stations in the SF bay area when we leased the car in late September. eVgo has started rolling out CCS/CHAdeMO dual plug chargers fairly aggressively and now there is an ABB Terra 53 CJ charger 8 miles from our house at the northgate mall in San Rafael and another at the premium outlets in Petaluma. A BMW ChargeNow card also came with the car that gives us free fast charging at eVgo CCS stations through the end of 2015- provided we charge at least once before the end of 2014.
Since we now have a CCS station so close to our house, this seemed like the perfect opportunity to roll in to the station with a low state of charge and see what happens. We showed up with 11% SOC of charge and 8 miles of range on the i3’s “guess-o-meter” and other than having to wave the ChargeNow RFID card in front of the charger and lugging the monstrous cable over to the charge port, the experience wasn’t that different from a supercharger stop. Unfortunately the i3 doesn’t report things like charging power, charging current, and charging voltage and the iPhone app sometimes takes a few minutes to update so logging the data was a bit challenging. I ended up just taking a photos of the data on the ABB charger screen at different time points. I calculated the charging power by comparing the difference in delivered kWh and the difference in time between data points.
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It took about a minute for the charger to reach full power and it stayed there until sometime between 60% SOC and 69% SOC (my wife and I had coffee at the nearby Peet’s coffee and despite sneaking out to the parking lot a few times, I missed a datapoint or two). I calculated full power to be around 42 kW which is a reasonable fraction of the rated 50 kW written on the plug. It turns out the free charging sessions only last for 30 minutes and then the charger shuts off. After 30 minutes, the state of charge was up to 88% with 65 miles on the guess-o-meter (probably would have been about 71 rated miles if BMW had adopted Tesla’s non guess-o-meter method of displaying range). The total power delivered was 13.85 kWh.
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We then hopped in the car and headed to Petaluma. We started charging there with 55% state of charge and then checked out the premium outlets (and the bathrooms at the premium outlets). We would have had a bit more range left if the BMW nav system hadn’t gotten horribly confused about how to get to the premium outlets and I made sure to point this out since my wife tends to give me some grief every time the Tesla nav system doesn’t get things quite right. After 25 minutes, we were ready to head back with a 95% SOC and 7.35 free kWh.
Overall I was pretty impressed with whole the experience. The frankenplug is definitely not as elegant as a supercharger cable and 42 kW is far less than 120 kW. But the light little i3 goes farther on a kWh so the charging speed during the full power portion of the charge works out to something like 200 rated miles per hour. A supercharger adds range up to twice as fast, but 200 miles of range per hour is still pretty respectable. And having access to these chargers dramatically increasing the capability of the non-REx version of the i3. Thanks to these stations we’ll now be able to take the i3 to Healdsburg to pick up our wine club shipment. And since my wife likes driving the car so much, she’s offered to be the designated driver for any winetasting that might ensue