2018 Prius Prime no longer getting 25 miles per charge

Discussion in 'Prime Fuel Economy & EV Range' started by Bejeffer, Dec 10, 2018.

  1. Ankana

    Ankana Junior Member

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    Batteries discharge faster when they are cold. To make matters worse DC heaters are not very efficient.
     
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  2. schja01

    schja01 One of very few in Chicagoland

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    The Prime has a DC heater?
    Heat Pump and engine coolant yes but DC??
     
  3. Ankana

    Ankana Junior Member

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    Seat heater and any defrosters will be Direct Current Resistance heaters
     
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  4. bisco

    bisco cookie crumbler

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    i thought the ac was ac
     
  5. a_gray_prius

    a_gray_prius Rare Non-Old-Blowhard Priuschat Member

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    Are you checking cold tire pressures? Your garage might be heated and register spec tire pressures, but once you go outside into the cold that air's going to contract. We've been over-inflating by a bit to get spec pressures at low temperatures (because I think the spec is set at not-20F).

    That said, our Model S is (very) noticeably slower when it's cold and I find myself not getting to my normal 275 Wh/mile rate until 30-40 minutes of driving, even with preheating. I've been assuming the Prime is pretty much the same.

    There's also a battery heater that is probably eating some of that power in both cars (although the one in the Prime is supposed to only come on with a charge cable attached, so I'm not sure).
     
    #25 a_gray_prius, Mar 19, 2019
    Last edited: Mar 19, 2019
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  6. Salamander_King

    Salamander_King Senior Member

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    First time since last Dec, my EV range GOM returns to above 25miles. Good timing that the gas price has gone up substantially in last few weeks.

    IMG_20190319_063358.jpg
     
  7. Prius from Dad

    Prius from Dad Senior Member

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    My GOM hasn't gone below 29 since I got mine in Jan. '17. Then again as @HPrimeAdvanced says, "I drive like a crippled snail" lol
     
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  8. Salamander_King

    Salamander_King Senior Member

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    Yeah, if ICE stays off when I first start the car in morning, I can usually keep the GOM above 25. Today was the first such day, ICE did not start when I first turned on the car at 16F outside.
     
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  9. jfilipeferreira6

    jfilipeferreira6 Junior Member

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    I get 45,3 miles (72km) EV-only everyday from work

    upload_2020-3-11_19-29-12.png
     
  10. benagi

    benagi Active Member

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    Since the weather has warmed up to 60° here, my GOM is reading 31 to 32 miles these days. Not bad for a 2 1/2 year-old prime.
     
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