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On the newer Nissan Ariya model: at home, battery SOC says 99%, predicted range 290 miles. We go on family day trip to the beach, 30 miles later and SOC says 7
by foobarian 2y ago
On the newer Nissan Ariya model: at home, battery SOC says 99%, predicted range 290 miles. We go on family day trip to the beach, 30 miles later and SOC says 70% with 260 miles predicted range. I am no expert and I'm sure these systems are hard to build but we have got to be able to do better than this.
- ManuelKiessling 2y agoIt’s very late here and/or I‘m dumb, but isn’t 290 minus 30 equal to 260…?
- meeb 2y agoI think they meant the percentages were wildly inaccurate. 99% at 290 miles would give a 100% range of 292 miles. 260 miles should be 89% remaining, not 70%.
- Yizahi 2y agoSimilar situation to the phone and laptop batteries, except it is an order of magnitude harder and more expensive to compensate for crap predictions by manufacturer.
- magicalhippo 2y agoI have a Renault Megane E-Tech, which shares platform with the Ariya, and I've noticed the range estimation seems to be heavily biased to recent driving. That's almost always too and from work in the city, so when I take it to the highway the estimated range drops like a brick. Especially speeds above 100 km/h (~60 mph) really drains the battery. That said, if I enter the route in the Google Maps-based navigation, I find that it fairly accurately predicts SOC at the destination. So I tend to use that, or just do my own estimation. Though, AFAIK the Ariya has an Amazon-based system, so not sure how that relates.
- foobarian 2y agoI wonder why I don't perceive a similar issue with my gas car. Two reasons come to mind: 1) Gas consumption does not have as much variance as EV. Actually there are canceling effects because gas engines are more efficient on highways, but drag is higher. As a result the amount of fuel consumed is more predictable and therefore the range is more predictable. 2) The safety net of the "I'll fill up when pointer is near empty" habit. This can be harder for EV in exceptional trips i.e. not predictable daily commute, which is exactly where the chance of being further away from fast charging is higher. I think 2) will get better over time and as we get more used to it. And about 1), it's pretty cool that EV are so much more efficient at slower speeds - it's a real testament for the technology.
- magicalhippo 2y agoYeah I do think your first point is a big factor. I think I'd be more happy if my car split my range estimates into "city driving" and "highway driving", and provided those two different estimates side by side. Since my car doesn't know where I'm going, without telling it through the nav system, that would be a much more useful approach. Of course, that would also mean people would see the much lower range, so I guess it would affect sales to first-time EV buyers.