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Hot weather range

Discussion in 'Australia & New Zealand' started by mhh, Dec 12, 2015.

  1. mhh

    mhh Member

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    #1 mhh, Dec 12, 2015
    Last edited: Dec 12, 2015
    I was hoping to drive my P85D approx 385km from Adelaide to Penola next Saturday but I see the forecast is 42 degrees. I would be driving in the heat of the day with no passengers. The road is mostly flat after the Adelaide Hills. Will I make it without a top up charge if I cruise at 100km/h? Would it help if I slowed down? The following morning I planned to drive a similar distance to Bacchus Marsh before a quick top up at the home of a friendly owner before aiming for Melbourne. I'd be doing that trip in the morning. Should I rethink the trip? I have ICE alternatives.
     
  2. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    It should be possible, I've done longer trips in similar weather with a passenger and luggage, but I'd feel more comfortable if there was even one place that you could pick up a few miles if needed. Be sure to adjust your tire pressure before you leave. At 42 you'll need 5 psi more than the vehicle placard pressure just to deal with the heat. Watch the difference between projected range on the energy screen and rated range closely, as well as the trip graph. Note also that wind can be a big factor.
     
  3. mike_j

    mike_j Member

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    Should be fine - keep an eye on the forecast % remaining. If it gets below 2% slow down, and follow another vehicle at a safe distance.
     
  4. raynewman

    raynewman Member

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    G'day, set your range display to typical KM if not already done. Last Thu/Fri I went Brisbane Chinchilla return (approx 300 km) which has on the outward journey a rise of over 700 m elevation. Arrived in Chinchilla with approx 80 km range. Mine's an 85 which gives me a slight range advantage. As long as you don't launch and you run on TACC you should have no problem.
     
  5. meloccom

    meloccom Moderator Aus/NZ

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    EVTRIPPLANNER suggests that a P85D with 21" wheels will use about 78Kwh or 420 Rated Km so it will be close.
    Try to time your 100% charge to finish just before leaving, pre-condition the car then select range mode. I would take it easy at first and stick to 100Kmh until the range prediction suggests that you will make it, you can speed up then if you fee like it.
    You will arrive with pretty much a depleted battery so the question needs to be asked what charging arrangements do you have at the destination as a 10 amp supply will take about a day and a half or more to replenish what you will use.
     
  6. mhh

    mhh Member

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    Thanks guys. I'm leaving the car overnight on the destination charger at Raidis Estate. :)
     
  7. WhiteStar

    WhiteStar Member

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    Turn off the A/C? :) Well maybe not as good a suggestion as all the others here but interesting looking at your route using evtripplanner.com without HVAC or at least setting internal & external temp to 42°, 9.2 kWh (almost 50 km) could be gained. If it was me, I’d keep the A/C on, slow it down to the 90’s & enjoy the music & scenery!
     
  8. lennier

    lennier Member

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    Yeah my experience coming back from Bairnsdale to Melbourne was that a) dropping 5kmh to 95 made a surprisingly large difference to the arrival buffer (8% cf -2%) and b) on a multi-lane highway the vast majority of people were more than happy to sit behind me at 95kmh and not bother overtaking. Aircon (range mode) and chilling out at a slightly slower speed would be my preferred option too if you're getting tight on range :)
     
  9. Barry C

    Barry C Member

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    Hi,
    Interested S60 range as so far my longest round trip is to Bellarine 25 degrees (pretty flat?) of say 220Ks at 80-110 kph with plenty (100K) apparently to spare. Bairnsdale is 290K(?) so I assume you had 20-30Ks (8%) indicated remaining after starting with a full charge at the beginning.
     
  10. lennier

    lennier Member

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    I'll PM you with my figures from Bairnsdale Barry.
     
  11. heosat

    heosat Member

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    mhh, you should be fine. Just set your cruise to 90km/h and cool the cabin to around 21C. The aircon is very efficient and the higher temperatures will lower wind resistance so I'm confident you can make it (I've done it easily).
     
  12. Keiron

    Keiron Member

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    Gudday
    Attached is 100Km/Hr with aircon on 42 Deg C external 22 Deg internal

    The second pic is same spec but at 85Km/Hr.

    Using EVTRIPLANNER. Penola 100k per hr 42C.jpg Penola 85km per hr 42 C.jpg
     
  13. TesAus

    TesAus Member

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    About 10% difference? By the way did you know you can change the units to
    metric under the settings tab?
     
  14. Mark E

    Mark E Member

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    The speed limit in South Australia is 110 not 100 - and I think that EV trip planner uses average speeds, so 0.85 would be 90-93kmh.
     
  15. BenT

    BenT Member

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    Let us know how you go. I would be interested in doing the Adelaide Penola trip
    myself.
     
  16. mhh

    mhh Member

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    Sure will. I'll be there Saturday night if all goes well.
     
  17. moemoke

    moemoke Member

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    This is a bit Off Topic but I'm interested to know if you have the watt/hours per km display showing in the dash
    does it change much if you turn the aircon and lights off or on or does the readout only display the power that the
    motor is using?
    You'd think it would but I have never seen it mentioned.
     
  18. Mark E

    Mark E Member

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    The trip meter shows the Wh/km since last starting and last charge as well. This definitely includes heating and aircon - in winter time the usage is quite dramatically different when heating is used. Cooling the car doesn't seem to affect it as much - which I found surprising. I'd thought that the heater would include reverse cycle air conditioning for efficiency but it appears to use resistive heat.
     
  19. sdick3

    sdick3 Member

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    373km SOC 100 down to 10%. Travelling at 95 or lower. P90D. Range Mode. 70.8 kWh. 21inch Tyres make a difference.

    I calculate 78-80kwH useable on the P90D.


    Capture.JPG
     
  20. alpal

    alpal Member

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    Wow! Nice graph. Probably common knowledge so please forgive me asking, 'What software is this?'
     

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