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Remote A/C versus remote engine start

Discussion in 'Gen 3 Prius Main Forum' started by hybridtwins, May 21, 2009.

  1. hybridtwins

    hybridtwins Member

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    I noticed that there's a $529 remote engine start option available on the 2010, which is a lot less than the $3,600 you have to shell out to get the solar roof package w/remote A/C start (which starts the A/C electrically without starting the engine).

    This seems to beg the question: why not make the remote A/C a standalone option?
     
  2. sluday

    sluday New Member

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    I think you need energy from the solar panels to power the remote A/C fans. I think HTMLSPINNR answered this question in another thread. :mod:
     
  3. Tideland Prius

    Tideland Prius Moderator of the North
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    Yup. Remote Start uses the engine. Remote A/C runs off the HV battery. Remote Start is what you use on Priustoric vehicles (and I hate remote starters in the first place).
     
  4. checo446

    checo446 New Member

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    Newbie question. Is the remote engine start installed at port or is it at the dealer?
     
  5. Daishan

    Daishan New Member

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    Does anyone know if you can order the Remote Start later after you receive the car and have the dealer or a local auto aftermarket shop install the Toyota Remote start system?

    Or do you have to order it from the Port and have it installed at that time?

     
  6. sluday

    sluday New Member

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    Both. I have heard that you will save a few bucks if it is done at port.
     
  7. hybridtwins

    hybridtwins Member

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    Are you saying that the fans powered by the solar panel that provide ventilation are one in the same as what's already built into the climate control system?

    If so, these fans would normally be powered by the battery when the ignition's on, as would the A/C compressor that is started by the remote, and I would think the energy drain of the fans would be negligible compared to that of the compressor. So doesn't it work out to be almost the same difference?
     
  8. sluday

    sluday New Member

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    I don't know how to post a thread in this post but if you go to search and look up "2010 solar roof questions" there are many posts explaining the differences between the remote A/C and the remote starter. I was the thread creator.
    Htmlspinnr does a great job explaining the system and even includes diagrams.
     
  9. V8Cobrakid

    V8Cobrakid Green Handyman

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    solar ventillation is directly powered by the panels. it does not have a battery system.

    remote a/c used the traction battery for up to 15 mins or something like that.. it won't turn on unless certain battery and temperature settings are reached.

    remote engine start does exactly that.. turns your prius on where all your preset radio volumes and a/c setting will engage.. the car will do it's warm up cycle and continue on.. as a running prius... untill you jump in. i'm not sure how long the timer is for this. I think it's 30 mins and if the doors are not opened, it shuts off.
     
  10. ggood

    ggood Senior Member

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    My recollection is its 3 minute auto shutoff for remote a/c, and 10 minutes auto shutoff for remote engine.
     
  11. HTMLSpinnr

    HTMLSpinnr Super Moderator
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    This is correct. That 3 minutes varies by HV battery state. The documentation gives "up to 3 minutes". Remote engine start is 10 minutes.

    Yes - solar equipped cars get a beefed up motor though to handle the extra hours over it's lifetime

    One of the Toyota folks @ the Detroit event stated that the solar panels would continue to run the blower in Remote A/C mode. I haven't found anything supporting this though. The compressor is run by the HV battery though exclusively.
     
  12. V8Cobrakid

    V8Cobrakid Green Handyman

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    3 mins.. 5 mins.. shrug.. i really don't care about the seconds you can use this system. i'm just trying to clearify processes.

    the solar panels do not tie in with the car's battery systems in any way. don't so would have caused a huge amount of static to the car.

    so.... the vent motor can not be tied in with the normal A/C.. and the panels do nothing to help remote A/C functions in any sort of way.

    so... NO.... these fans are NOT the same. the vent fan is isolated to the solar panel circuit, while the remote A/C function feeds off your auto climate control aka large battery.
     
  13. ancientsan

    ancientsan Junior Member

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    Does remote start allows you to turn on heater to defrost?

    Remote A/C will not allow you to do that, right?
     
  14. Tideland Prius

    Tideland Prius Moderator of the North
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    Yes because it turns on the engine like a regular non-hybrid gas guzzler.
     
  15. HTMLSpinnr

    HTMLSpinnr Super Moderator
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    This is incorrect. One blower motor for both functions. There's a relay of sorts to switch between power sources for the motor.

    What's unknown is if the solar panel continues to power the motor during A/C.

    There's no easy way to show the EWD to validate this though.
     
  16. FireEngineer

    FireEngineer Active Member

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    Once the remote AC is activated the solar ECU switches the relay for fan power source to the cars 12 volt system and uses that to power the fan. The A/C ECU determines fan speed needed at that point based on interior temperature, exterior temperature, A/C temp setting, etc. , different fan speeds need different power levels. The solar panel will only be able to spin the fan based on the solar energy received which may not be sufficient depending, hence the switching of power supplies.

    Wayne
     
  17. ggood

    ggood Senior Member

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    Here's the remote start instructions:
     

    Attached Files:

  18. gadmire

    gadmire New Member

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    This morning I had the remote start installed on my Prius II (two days after purchasing the Prius). This was the first unit installed by my dealer (probably why it took almost five hours to install). They had to order the part from another dealer out of state. The part I had installed was a Toyota branded item.

    Contrary to some posts on this site, I find that both the A/C and the engine are turned on when the remote is activated (assuming you had A/C going when you last shut down the engine).
     
  19. royrose

    royrose Senior Member

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    I would think that the engine turning on would depend on how much charge there is in the battery, whether the engine is already warmed up, etc.

    Please post your experience with the remote start. Do you notice significant cooling? If so, how long does it have to run to make a difference? Bottom line, do you think it is worth it?
     
  20. darkleafar

    darkleafar Member

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    I think a sticky might be needed for this? I can no longer recall how many times I have explained this and how many times I ve seen folks like Tideland and HTmlspinnr explain it as well:


    Remote A/C :
    • Turns on the Air conditioning system only.
    • Draws its power from the Prius battery and therefore the engine is not powered on.
    • Since it is battery based, it is limited to 3 minutes running time.
    • If your battery is low, it will not work (you can call it "safety" feature)
    • It is only available through the Solar Roof Package, nowhere else.
    Remote Start :
    • Turns on the engine, period. Anything else that turns on as a consequence of turning the engine its no different than when you get in the car and turn on the engine yourself. Any switches that are already flicked on (such as the A/C) will obviously turn on.
    • Again, you just turned on the engine, so this has nothing to do with the Prius battery nor the solar panels.
    • Limited to 10 minutes (security feature).
    • Available either as a dealer installed option or port option.
    I hope that clears things up for most people..