TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC
Start a Discussionhttps://teslamotorsclub.com/tmc/tags/

Very High Electric Bill

Discussion in 'Model S' started by mbhforum, Mar 23, 2017.

Tags:
  1. mbhforum

    mbhforum Member

    Joined:
    Apr 4, 2016
    Messages:
    509
    Location:
    Long Island, NY
    #1 mbhforum, Mar 23, 2017
    Last edited: Mar 23, 2017
    So, I just got my first electric bill since I got my Tesla. From January 22-March 23rd, I used 2250kwh for my house. For the same exact period a year earlier, I only used up 1100kwh. While we've had a cold winter in NY, I have gas heating. I use a 14-50 to charge.

    I've only put on around 1,500 miles so far, and I do tend to charge it every night, which usually only takes 2-3 hours to get to 90%. My wife did start a new business in December where she does a lot of vinyl printing with a cricuit machine and heat press, so that might contribute a little, but I can't imagine much.

    Does this seem right?
     
  2. Lbkmxp100d

    Lbkmxp100d Member

    Joined:
    Dec 7, 2016
    Messages:
    202
    Location:
    Lubbock, TX
    If you own a 100kw battery and according to your info you would have charged from zero to 100% 11.5X. I seriously doubt the Tesla is to blame for your increase in usage. You have to look at other electricity using appliances (a/c, washer/dryer, dishwasher, etc...).

    I own a P100DL and have driven 10k miles since dec 20th and I have not noticed any significant increase in electrical usage.
     
  3. Snerruc

    Snerruc Member

    Joined:
    Apr 16, 2016
    Messages:
    485
    Location:
    Palm Bay
    If the 1500 miles were all during this period, you probably used about 500 kWh for the car including vampire and charging loss. This is assuming all charging was at home and your average watts/ mi were 300 or less. Add 10-15% if you are about 330. Might be the heat press uses more than you think.
     
    • Like x 1
  4. Hans Allis

    Hans Allis Member

    Joined:
    Sep 21, 2016
    Messages:
    238
    Location:
    Leersum, Netherlands
    1500 miles * 0.45 kWh/mile = 675 kWh. Explains a significant part of the increase. I'd get a power meter to plug between the wall outlet and any device to figure out how much the vinyl related machinery uses, but I guess the Tesla's the main cause.

    Luckily you paid $0 in gas for the Tesla :)
     
  5. mbhforum

    mbhforum Member

    Joined:
    Apr 4, 2016
    Messages:
    509
    Location:
    Long Island, NY
    Yes, all charging was at home. I got the car right around the date the meter reading started.
     
  6. martinicus

    martinicus Member

    Joined:
    Aug 15, 2016
    Messages:
    195
    Location:
    North NJ
    If you can, install a real-time sensor device on your circuit breaker. I have a Neurio but other people on here are using Sense. It's great to see exactly the patterns and usage spikes (50 amps charging tesla dwarfs everything else in my house, as we have natural gas). I can also see my solar production in the same graph.
     
    • Informative x 1
  7. MorrisonHiker

    MorrisonHiker S 90D 2017.34 2448cfc

    Joined:
    Mar 8, 2015
    Messages:
    3,266
    Location:
    Colorado
    I only use 5-6 kWh driving my Tesla round-trip on a typical work day. Even with two Teslas, I think we only average about 20 kWh per day for both cars combined.
    I looked up a heat press than they can use a lot of energy: Lab Report: Energy Consumption | Printwear
    If the heat press is used for heavily 8 hours a day, it could use 14 kWh a day. If the heat press is 120 volts, you could easily use a Kill-a-watt or something similar to measure how much power it is using. There are lots of other devices you could use to measure energy use for the whole house, various circuits, etc. but the Kill-A-Watt
     
  8. mbhforum

    mbhforum Member

    Joined:
    Apr 4, 2016
    Messages:
    509
    Location:
    Long Island, NY
    Correction, it's 1200 miles I've driven, not 1500. My wife doesn't use the heat press that much. Maybe a few hours a week at most. She uses the cricuit more. I might need to get some voltage monitoring going...
     
  9. McRat

    McRat Active Member

    Joined:
    Jan 20, 2016
    Messages:
    4,051
    Location:
    Norco, CA
    Do you have a Time Of Use plan available from your utility or a specific EV charging plan?

    We charge 2-3 EV's each night and our power bill is lower than before we bought the first one.

    How did that happen? We programmed other devices to operate in the EV time window and minimized power use at the peak hours.
     
    • Like x 1
  10. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    1,507
    Location:
    Chicago, IL
    Vampire drain in cold areas is significant (in December and January when it was 26F avg, I was losing around 6kwh of energy per day). That's 180kwh per month in wasted energy. I did not have this issue with a leaf.

    The car also is less efficient. I am now averaging 293wh/mi vs. 370s in deep winter (or higher depending on where/how I was driving). Less efficiency means your 1200 miles used up to 500kwh. I can't explain the other electric usage other than being at home instead of at work uses electricity in other ways (winter = lights on dark days, especially in your neck of the woods).
     
    • Like x 1
  11. mbhforum

    mbhforum Member

    Joined:
    Apr 4, 2016
    Messages:
    509
    Location:
    Long Island, NY
    I just thought of something. I have a script polling the Tesla API every minute from my Mac. I have a feeling this might be causing the vampire drain!
     
  12. DarkMatter

    DarkMatter Member

    Joined:
    Jul 13, 2016
    Messages:
    542
    Location:
    Olympia, WA
    The Cricut won't use that much power. Heat press will matter, sure, but again shouldn't be that much power. Sounds like you have some detective work to do. With three EVs in the house we still only used 1323 kWh last month. Adding the Tesla added around 400 kWh/month of usage.
     
  13. MorrisonHiker

    MorrisonHiker S 90D 2017.34 2448cfc

    Joined:
    Mar 8, 2015
    Messages:
    3,266
    Location:
    Colorado
    How much vampire drain were you seeing per day? My Model S only loses 2-3 miles per day.

    Also, you mentioned gas heat, but is it hot water or forced air? If forced air, the furnace blowers would be running a lot more in the colder months.
     
  14. mbhforum

    mbhforum Member

    Joined:
    Apr 4, 2016
    Messages:
    509
    Location:
    Long Island, NY
    I am running hot water heat. How am I able to tell how much vampire drain I am using?
     
  15. thefortunes

    thefortunes Member

    Joined:
    Jun 14, 2013
    Messages:
    603
    Location:
    Wisconsin
    Something isn't adding up on your charge pattern.

    You say you have driven about 1200 miles so far (from a later post). That is about 20 miles per day for the 2 months you have owned the car. To replace 20 miles of driving (at 450 Wh/mi which is probably reasonable for NY in winter with short drives) should only take 1 hour of charging on your NEMA 14-50.

    Math:
    20miles x 450Wh/mi = 9 kWh used / 90% efficiency charging = 10 kWh consumed at the wall
    NEMA 14-50 charges at 40amps * 240volts = 9.6kW per hour

    It appears that your vampire losses are doubling-tripling (based on your comment about 2-3 hours of charging per night) your electric consumption for the Tesla.

    Edited to add: If you are polling the car every minute that will definitely dramatically increase your vampire losses as the car will not be allowed to go to sleep. There are many threads about vampire losses and the causes - it appears you have some reading to do :)
     
    • Like x 1
  16. MichFin

    MichFin Member

    Joined:
    May 8, 2015
    Messages:
    299
    Location:
    Detroit, MI
    You should be getting anywhere from 2-3 miles per KWH depending on how aggressively you drive. Either way that's about 400-600 KWH and not 1200+. You should look at your bill and see if it was estimated in previous months. This happens sometimes when they don't take regular meter readings so when they do it's unpredictable.
     
    • Like x 1
  17. mbhforum

    mbhforum Member

    Joined:
    Apr 4, 2016
    Messages:
    509
    Location:
    Long Island, NY
    I noticed my car takes 2.5-3 hours to charge usually from a 30 mile round trip commute. I am stopping my 1 minute API polling and will report back and see if I notice an improvement.

    I drive mostly AP as it's most highway driving at 70mph with climate turned on. My readings are actual every 2 months, not estimates. They used to estimate every other month, now they just do actual's every other month and don't report on estimates.
     
  18. K-MTG

    K-MTG Sunshade Captain of TMC

    Joined:
    Oct 24, 2015
    Messages:
    3,859
    Location:
    Irvine, CA
    Is your utility on a tier plan? For instance my SCE is defaulted on a tier plan (1-4), if I didn't switch to the EV rate plan. I would be paying $0.45 on tier 4 per kw instead of $0.12 as I do on their EV plan.
     
  19. thefortunes

    thefortunes Member

    Joined:
    Jun 14, 2013
    Messages:
    603
    Location:
    Wisconsin
    See my post #15. Your vampire losses are significant. What does the car say your lifetime Wh/mi is?
     
  20. rpo

    rpo Member

    Joined:
    Jun 12, 2014
    Messages:
    248
    Location:
    Washington
    I have a P90DL (which is driven aggressively), an electric water heater, and electric dryer. My usage runs about 1,000 kWh per month, so your total is not that far off. If you have tiered electricity rates, it may hit the pocketbook hard, but it's still cheaper than gas anywhere in the country. I only spend $50/month on electricity here.
     

Share This Page