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Thread: Power drain while idle (Vampire Load)

  1. #531
    S85 - VIN:P05130 - 3/2/13 jerry33's Avatar
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    Quote Originally Posted by RichardC View Post
    I am continuing to see average daily losses of approximately 16 km = 3.2 kWHr = 135 Watts average power consumption. Indoor storage at temperatures between 20 to 30 degrees Celsius. No clear difference between versions 4.4 and 4.5.
    As far as I know, that's expected. There was no vampire fix in 4.5. I believe the target for a fix is for late summer, although that was said some time ago and hasn't be updated.
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  2. #532
    Sig X#1100 and X#1618 Discoducky's Avatar
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    Quote Originally Posted by twinklejet View Post
    I'm really curious. HOW MUCH is acceptable to you guys?
    I think the better question would be "How much is acceptable to the EU?" I wonder if there are regulatory requirements coming for shipping into the EU? Anyone know?

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    On 6 January 2010, the European Commission's EC Regulation 1275/2008 came into force regulating requirements for standby and "off mode" electric power consumption of electrical and electronic household and office equipment.
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  3. #533
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    I received this email response from Tesla's Walter Franck on July 9 in response to my question about when the vampire load will be fixed. My apology if this is a boilerplate response posted previously.

    Regarding the ancillary drain of Model S. Over the course of the next several months the firmware will continue to be updated to reduce the power consumption of the car’s computer systems. We strive to strike the right balance between minimum energy consumption and ability to have the car always ready and responsive. In our next major firmware release coming this summer, the car's computer systems will use half the power they currently do when the car is off. By the end of this year, they will use about 1% of the power that they do now when the car is off. The loss of range when the car is off has absolutely nothing to do with energy needed to heat, cool or otherwise do anything to the battery pack. The battery pack simply doesn't consume energy when the car is off nor do the systems that manage it. All of the "sleep" energy loss is going to onboard computer systems and providing the useful benefit of keeping them ready to start-up at a moment’s notice when the driver returns. As noted above this energy consumption will be almost completely eliminated over the next 2-6 months.

  4. #534
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    Quote Originally Posted by ddruz View Post
    I received this email response from Tesla's Walter Franck on July 9 in response to my question about when the vampire load will be fixed. My apology if this is a boilerplate response posted previously.

    Regarding the ancillary drain of Model S. Over the course of the next several months the firmware will continue to be updated to reduce the power consumption of the car’s computer systems. We strive to strike the right balance between minimum energy consumption and ability to have the car always ready and responsive. In our next major firmware release coming this summer, the car's computer systems will use half the power they currently do when the car is off. By the end of this year, they will use about 1% of the power that they do now when the car is off. The loss of range when the car is off has absolutely nothing to do with energy needed to heat, cool or otherwise do anything to the battery pack. The battery pack simply doesn't consume energy when the car is off nor do the systems that manage it. All of the "sleep" energy loss is going to onboard computer systems and providing the useful benefit of keeping them ready to start-up at a moment’s notice when the driver returns. As noted above this energy consumption will be almost completely eliminated over the next 2-6 months.

    Thanks for sharing that. It's good to know the fix is still on schedule. It's also good to know that 100% of the drain is from the computer and not from battery management.

  5. #535
    Model S: VIN P 3552 gg_got_a_tesla's Avatar
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    Is there any product specialist better informed than Walter Franck?! I doubt it. Thanks for sharing, ddruz.
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  6. #536
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    As a side note, I had an issue with my 12V battery which shutted down most of the onboard always on electronics. 48 hours later when the ranger arrived and was able to get the car up and running, I had lost 4 km of range compared to 30-40km in normal circumstances.

    Now let's go to the 12V thread to tell my story
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  7. #537
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    Quote Originally Posted by ddruz View Post
    In our next major firmware release coming this summer
    Sure wish they could be somewhat more specific. In "Tesla language" summer could mean anytime between now and early October. Originally, the word was that 5.0 was due out by the end of May.

  8. #538
    Member Merrill's Avatar
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    Anyone here any more on firmware and vampire loss in regards to updates to minimize this problem.
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  9. #539
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    A datapoint from user Andrewas on the norwegian forum:

    Range reduced from 365km to 364km overnight from 0:10 - 9:40, so the vampire drain seems to have been reduced a lot on the EU cars
    I assume he has FW 5.5 as that seems to be normal on the cars delivered to EU, not reported though.

  10. #540
    Model S R231 EU widodh's Avatar
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    Quote Originally Posted by OleJA View Post
    A datapoint from user Andrewas on the norwegian forum:

    Range reduced from 365km to 364km overnight from 0:10 - 9:40, so the vampire drain seems to have been reduced a lot on the EU cars
    I assume he has FW 5.5 as that seems to be normal on the cars delivered to EU, not reported though.
    As far as I know EU cars get 5.0, but I could be confused since the EU user manual assumes 5.0

    Anyway, a loss of one KM is about the same as the Roadster.
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