How long will Clarity run in EV mode in park? neutral?

Discussion in 'Clarity' started by Robert_Alabama, Feb 15, 2021.

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  1. Robert_Alabama

    Robert_Alabama Well-Known Member

    I know I probably should have already picked this up, but if you leave the Clarity running in EV mode in park, how long until it automatically shuts off? Will it behave differently if in neutral with parking brake set? Just thinking ahead to the possibility of using an inverter to help with a power outage.
     
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  3. A previous thread had the car in HV mode while using an inverter for back up power. The ICE would run intermittently to maintain SOC.

    Another thread discussed using cabin heat, with the car in EV to warm a garage. This, reportedly drained the battery in an hour. So, there may not be an automatic shut off.
     
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  4. Robert_Alabama

    Robert_Alabama Well-Known Member

    @Landshark , thank you. I'll have to look up the thread. The Volt won't let you operate the car in park (not sure about neutral) for more than 30 minutes to keep someone from parking it in the garage with it still running (neglecting to turn it off) and the ICE possibly starting up and causing carbon monoxide poisoning. I wasn't sure if the Clarity had the same safeguards in place.
     
  5. JCA

    JCA Active Member

    I was going to post before that I doubt there's a timeout on being in "Ready" mode whether driving or parked, but now I wonder. I know cars nowadays are generate somewhat less carbon monoxide than old cars due to catalytic converters, so a 30 minute or so shutdown could well minimize the risk of doing so unintentionially (or intentionally trying to harm yourself). Still extremely dangerous to do so, of course.

    You know, I wonder if the engine will actually start in Park in the first place? The only time I ever experienced any sort of driving power loss was just after getting this 2nd Clarity, my wife and I took a drive over an 8300 foot mountain pass (starting from sea level). We pulled off for a snack at a viewpoint on the climb back over, and sat in Park/Ready for ~10 minutes; the HV battery was already at or close to 2 bars at that point. When I accelerated away I saw 1 bar for the only time ever, and it was sluggish for a minute until the climb/acceleration let up a bit, then it seemed to charge up and ran fine after that, full power even though 2-bars. Now I suspect that in Park it lets the battery get to a lower threshold than it does driving, and I don't know if it would start the engine or shut down the car if you stayed parked longer.

    To answer this and the original question, we need someone to do an experiment leaving the car running with everything off (lights including DRLs, climate, radio, etc) to see how long it goes until either the HV battery is empty and the car shuts down, starts the engine, or shuts it down sooner. It needs to be someone who can park outside with a relatively secure/private driveway, and who doesn't use the car many days because of COVID Work-From-Home. That might be me if I think of it one of these days. In theory if the overhead is only a few hundred watts it should last for well over 24 hours.
     
  6. “Successful Clarity Back Up Power” by M.M. has a great deal of info.
     
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  8. Alex800st

    Alex800st Active Member

    When my battery is empty or almost empty, and I stay in car for extended period of time, and the car is in "Ready" and "Park" state, heater is on (it is freezing here in Canada for some weird reason) - car occasionally starts the engine for several minutes every 5-10 minutes.
     
  9. In EV, the engine will start shortly after the battery gauge drops to 2 bars, or when EV range reaches 0. In HV, the engine will start to maintain the SOC set point.

    Can’t explain the cold temperatures.
     

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