Recent content by Zoomit

My 2015 seems to be down to about 15.4kWh, just backing out capacity from on-board pie chart data. It's at 31,000mi and gets left at 100% SoC frequently. It has less than 10 DCFC sessions in total over it's lifetime.

I too would have expected to see a seasonal variation in capacity. Physics says it's there, and so it may be masked by my particular usage. I definitely see a seasonal variation in driving efficiency for my morning commute. I leave the car outside and it might be 30-40% less efficient in the...

My data on the original post showed no discernible correlation between seasons and battery capacity estimates. My seasonal temperature variation is about 50 degF.

In the universe I live in, a car's efficiency is best described as the distance able to be traveled given a quantity of supplied energy. That distance should be under a combination of conditions, with varying speeds and representing typical usage. Car efficiency data would be collected by a...

Simply put, but ignoring the difference in charging losses between cars (and now by ignoring cars availability worldwide), your conclusion that the "Spark EV is the most efficient car in the world" is fundamentally flawed. Your caveats are too significant to lead to your categorical conclusion.

But you don't have rigorously-controlled test data and you don't have equivalent IONIQ electric data. Actually you do but choose to ignore it.

The post really confuses me as you use MPGe from the EPA but then talk about energy efficiency while driving. The EPA fuel economy data, provided as MPGe, includes charging losses. Do you think charging losses should be considered when defining the "most efficient" car? Think about it like...

That variation is consistent with the 125 data points I collected: http://www.mychevysparkev.com/forum/viewtopic.php?f=7&t=4610

Thank you for the update. I am very curious about these brake failures: What driving mode the car was in: D or L? Was there any trend with respect to driving mode? Do each of you normally drive in one mode or the other? What you describe is a failure of both the regenerative braking and...

The Spark EV charging peak power can be seen in Figure 2b, on page 8, here: https://avt.inl.gov/sites/default/files/pdf/fsev/2015SparkDCFCAtTempBOT.pdf 80% SoC is about 15kWh and is reached at 25 minutes, and happens to be the peak with that test equipment. This is with only a 100A charger...

I suppose I got lucky too! More details: http://www.mychevysparkev.com/forum/viewtopic.php?f=7&t=4610

If it were me, I'd do Michelin Premier A/S in 195/55R15 all around. (Note the wheels are still not interchangeable front to rear.) There are higher performing all season options out there.

Do you own or lease it? A lease needs to be returned with stock size tires.

I would certainly be interested to hear how that effects the car. Not many have the wheels that allow this kind of direct comparison. Besides, a good pit crew can do this in, what, 2 seconds? https://www.youtube.com/watch?v=Xvu0GlMa3xQ

Do you mean in the rain? If so, things are "not equal" since the rears would presumably have a better time as they're generally in the wake of the front tires. So narrower tires that also have a better chance of cleared road would have an advantage. EldRitch--you could look up the part...