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Bill N

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Bill N last won the day on June 29

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  1. Yes, it's almost impossible to model that I would have thought - as it depends largely on the precise density and proximity of traffic at any moment in time. I was just really trying to think of other possible explanations for the discrepancy. Live data driving would certainly help significantly once you are on the move, but I'm not sure if it would help so much when it comes to pre-planning a journey out of the car. Unless, maybe, ABRP used the journey data collected from cars, in conjunction with available wind data for the time and location of each journey, which you could then apply to the raw car data to refine the model - so the next time a user enters a forecast wind speed of X, when pre-planning a journey that involves driving at Y degrees relative to the forecast wind direction, the model knows to increase the energy consumption by Z (adjusted for ground speed). I think the trouble is, there are so many localised factors that could potentially affect the actual wind that is affecting a car on a given road. So windy.com, or the nearest weather station, or whatever might say that the current wind is blowing SSW at 10mph, but the actual wind hitting the car might only be 7mph and might be blowing SW, due to local terrain, road side trees, binding, embankments, vehicles on the opposite etc etc. But, over time, and with more and more data points, it might be possible to define a good enough 'wind adjustment factor' for each car.
  2. Thanks Jason. Yeah, I do check the wind direction pre-departure via windy.com, and also use teslawinds.com whilst on route. If the wind direction would not result in either a direct headwind or tailwind, what I've done is just try to guesstimate a lower wind speed and entered that into ABRP - which still seems to result in a greater predicted impact than what actually materializes. It’s tricky though because (here in the UK especially) a route rarely follows a straight line - so you have to try and take into account the wind direction and then the variations in the direction of travel along the length of the route. In theory, (though I appreciate it’s probably far from straightforward) it should be possible for ABRP to pull the forecast or current wind speed and direction data and apply that to the model whilst factoring in the car speed and direction at different points along the length of the route. The other potential factor I’ve pondered is that whilst driving along a fairly busy 3 lane highway with other vehicles positioned to 3 (or sometimes all 4) sides of your own car, the actual airspeed of your car is possibly reduced and is not simply ground speed +/- wind speed because the air immediately surrounding your car is, to some extent, being ‘pulled along’ by the constant flow of moving objects.
  3. Bill N

    IOS & Android App ?

    I would pay for an app.
  4. Yes, IME, the i3 (sadly, just the i3 not the i3S here!) model is good, if quite conservative. I think the reference ‘consumption’ for the plain i3 120Ah can safely be increased to 3.9 mi/kWh, at least. IME, the only time the predicted SoC is significantly different to the actual SoC is when I enter a headwind in the settings. I check windy.com to see the wind along the route I am planning, and use that figure (or a little less) in ABRP - but, IME the impact of the predicted SOC is always greater than it actually needs to be. I don’t know whether this is because: a) The ABRP model is over-playing the impact of a headwind on the energy consumption. or b) The actual wind affecting the car is not as significant as that stated by windy.com. or, a combination of both. As it is though, the wind setting is essentially not much use because the predicted impact of wind is not borne out by reality.
  5. This is all kinda not that intuitive - perhaps a bit of a basic user guide would be good?
  6. The quickest plan for that journey (2h30m) is to limit the max speed to 130km/h so that you don’t need to stop to charge. That’s an average speed of 97km/h (based on a 241km route). That compares with your suggested 110km/h average in a polluting diesel car, which would save you 17m30s (12% quicker), but cost substantially more in fuel and pollute the areas through which you drive. Budget permitting, you don’t need to wait for a bigger battery - just a get a Model 3 LR instead of a SR+.
  7. If it was point A to B and then point B to point A via the same route then my understanding is the wind (and elevation profile) would *mostly* cancel each other out; however, my understanding is the benefit gained from a tailwind (and/or a down hill) is not necessarily equal to the losses incurred due to a headwind (and/or an up hill). Also, when I started this thread, I had in mind a route that went from point A and back to point A, bit via points B, C, D etc... i.e a ‘circular’ round-trip, rather than a bi-directional, linear ‘round-trip’. In the case of a circular round-trip, the winds may be completely different for different sections of the route, and even if they weren’t and the route was a perfect circle, I’m not sure the impact of the wind would be negated.
  8. This You Tuber has some videos on Leaf 40 battery temps etc which my be of some help:
  9. Slightly off-topic, but I wonder whether at some point you may be able to give users the option of choosing what they wish to optimize in favour of. For example, some users may wish to optimize in favour of efficiency, or minimal total energy consumed, rather than time - both for the environmental benefits but also the financial benefits.
  10. I'm unfortunately not able to use the OBD port on my car as it is used by the lease company for tracking purposes etc. Is the best test otherwise to drive at a GPS verified 65mph on a flat road, on a still and mild day and then report back the consumption figure the car reports so that the ABRP reference consumption figure can be adjusted, if necessary? Or is there better or additional tests that can be conducted (without OBD access)? Also, what weather & other conditions does the reference consumption assume? (I presume, zero wind, dry & flat road, nil added weight - but what about temperature?)
  11. Any thoughts on my suggestion of each user having a page or pop-up where they can see a list of all the chargers they have excluded? From there, the user could allows all chargers again with a single click. It'd also be great if we could exlude an entire network if possible.
  12. Description and Use Case: Instead of asking the user to determine whether there is a headwind or tailwind, maybe ABRP could just ask what the wind direction and speed is - and then determine whether that means headwind or tailwind depending on the route that is planned. This would also help in the case of the circular routes (eg when using round trip mode). At the moment, the headwind / tailwind setting can't really be used in tandem with round trip mode. Even better would be if ABRP could just ask the user to input the time and date for the journey, and the pull the current or forecast wind direction and speed data and apply that to the model for the specific route automatically. As a minimum, perhaps a link to recommended website (eg. windy.com) to find out wind data could be included in the settings screen just beneath the wind section.
  13. Bill N

    Replan button

    I think it works pretty well having: 1. the automatic re-routing, with it updating the start SoC to whatever ABRP thought the SOC was at the time of calculating the new route.(remembering there is no live data with some cars) And 2. The option to "replan" I think it might just be a case of ABRP signposting more clearly to the user what it is doing. Eg if you deviate from the route and it says you have left the planned route, maybe it could then say that it is recalculating automatically so the user know just to wait for it to update the route.
  14. Strange, but if I put "TW20 0" to Ipswich in ABRP it suggests the same route, near enough, as Google - via A406 (BTW, it may not be such a good idea to prioritise motorway based chargers in the UK, as that (currently at least) mostly means Ecotricity chargers which are notoriously unreliable and slow, especially via CCS)
  15. To add to this, is there anything owners can do to help improve the model even without an OBD device ? Any specific tests we can conduct and report back the findings?

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