TonyWilliams wrote:Ok, I've tossed out revision 3 of my range chart. I've used the 21kWh of usable battery power that many have adopted. Also, I added the average kW based on the 21 number for each speed as suggested.
TonyWilliams wrote:Ok, I've tossed out revision 3 of my range chart. I've used the 21kWh of usable battery power that many have adopted. Also, I added the average kW based on the 21 number for each speed as suggested.
See heremogur wrote:I'm curious what caused you to accept 21Kwh as the usable... My experiments to dead with a recharge to 100 percent have consistently shown that I put close to 24Kwh of power back in to the battery (after subtracting charger efficiency - about 26.67 KwH from the wall)... The EPA's numbers show the same. So, as far as I am concerned, based on my experiments and measurements - and those of others, it is a 24Kwh usable pack...
Looks good - esp. I like the Turtle explanation.TonyWilliams wrote:Ok, I've tossed out revision 3 of my range chart. I've used the 21kWh of usable battery power that many have adopted. Also, I added the average kW based on the 21 number for each speed as suggested.
evnow wrote:Essentially, if you accept that m/kwh shown on the dash is correct - then about 21 kWh is what leaf shows as usable. This has been verified using stats from many.
I've talked about other options Nissan has in multiple posts.EricH wrote:What would the alternative be? In order to predict range, the car would need to know where you were going (I use the Destination setting less than 5% of the time), as well as your planned speed, the topography details, and the traffic situation (XM here in Los Angeles only has freeway info, not city streets).
Nissan's "future performance is likely to resemble past performance" approach seems the only practical option here. Everyone realizes by now that if they drive 10 miles toward a freeway, then get on the freeway and drive 70+, their indicated range is going to basically collapse before their eyes. Absent a way to notify the car before you leave the driveway, that that's where I'm headed and how fast I'm going to drive, the Leaf is doing the best it can.
evnow wrote: Essentially, Leaf can become smart about the car's environment when predicting range rather than using a very premitive and simple algorithm it uses now.
Exactly - esp the part about travel time i.e. Garmin is predicting your avg speed and that is one of the important inputs Leaf needs to figure out the range.mogur wrote:A number of Garmin units now use predictive algorithms whereby it watches where you drive, how you drive, and how traffic varies from day to do, even if you are not using it for destination guidance. It then uses this info to pick the best route and give a better prediction of travel time when you do set a destination or route. Nissan could and should do the same with the Leaf Nav...
Have to strongly disagree. Everyone is simply guessing about charger efficiency. At least the 21 kWh number is useful when combined with the dash mpk.mogur wrote:I believe the total KwH of power put in to the battery when charging to be a more reliable indicator of capacity since it leaves little room for error or interpretation... Basically, the only variable is the actual charger efficiency, but that is pretty well known at this point. My numbers from TED have been very consistent in this regard and show close to 24KwH usable when I run it down to dead or turtle...
evnow wrote:Essentially, if you accept that m/kwh shown on the dash is correct - then about 21 kWh is what leaf shows as usable. This has been verified using stats from many.
that is the same number on the driver dashboard.TonyWilliams wrote:johnr wrote:I've found that in most cases my best range reference is actually that number next to the bar graph! Assuming reasonably constant speed, the car is very accurate and precise in indicating how many miles remain.
Which bar graph? Have you run the car to turtle to verify those numbers?
thankyouOB wrote:that is the same number on the driver dashboard.TonyWilliams wrote:johnr wrote:I've found that in most cases my best range reference is actually that number next to the bar graph! Assuming reasonably constant speed, the car is very accurate and precise in indicating how many miles remain.
Which bar graph? Have you run the car to turtle to verify those numbers?