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New outlet to garage, how much$

Discussion in 'Model S: Battery & Charging' started by Piney999, May 8, 2016.

  1. Piney999

    Piney999 Member

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    So first of all, I am a new here, I do know how to search, but I'm not even sure what I should search for. My question is, how much should I expect to pay (hardware + install) if I have an existing 110V 12 amp outlet next to my parking space? The second part is that this house had a hot tub out in the back yard, so the CB panel has an unused 100 amps, can I harness that, and send it to the garage?
    Like I said, I'm new, so be gentle.
    Cheers!
     
  2. Cyclone

    Cyclone Active Member

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    Pricing will
    Vary widely based on local costs and length of wiring. You have the bonus that we know your panel can support a new circuit, so it's a matter of getting it wired up.

    I would recommend you read over the Charging FAQ and then ask any specific questions you may have.
    FAQ: Home Tesla charging infrastructure Q&A
     
  3. Boatguy

    Boatguy Member

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    It's a question best asked of a local licensed electrical contractor. Wiring for the Tesla charger is not a DIY thing and could put the safety of your home at risk.

    Circuit breakers are sized to protect wire, they have little to do with the actual capacity of your electrical panel. Cost will be a function of local labor rates, whether your current panel/service has enough capacity and the distance / difficult of the wire run.

    Your signature says you have two chargers, so you want 100a circuit to supply 80a (20% safety factor is industry standard). Though if the incremental cost was crazy, you could use a 50a circuit and charge at 40a, it will still be charged overnight. There is not much benefit to having the car charged at 3am instead of 6am if you're asleep.
     
  4. Piney999

    Piney999 Member

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    Thanks for the input. I am just trying to figure out a budget for all my planned upgrades before I start making phone calls. Anyone with a ball park price?
     
  5. Middleseat

    Middleseat Member

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    Like Cyclone said, it will vary based on location.

    That being said, I just had one (NEMA 14-50) put in the other week in Houston for $400. That's for an 8 foot run between the circuit breaker and the outlet.

    YMMV.
     
  6. Piney999

    Piney999 Member

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    Is that hardware & labor?
     
  7. Cyclone

    Cyclone Active Member

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    Meanwhile, rearranging my panel wth half height breakers to make room, adding in a 50amp break, running copper one floor up and about 20 feet over, drilling through some wooden beams, building a junction box, and mounting everything was $450 for me. Took the electrician about 3 hours.
     
  8. linkster

    linkster Member

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    I would recommend (2) separate estimates (50a14-50, 100a Wall Connector) from (3) electricians.

    Good-Luck!
     
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  9. GKwey

    GKwey Member

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    I had a 100 ft run from a panel on the back wall of the house to a NEMA 14-50 in garage at front of the house, $1,200 material and labor.
     
  10. smsprague

    smsprague Member

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    25 foot run using an existing 50 amp unused oven circuit. So no new breaker, total was $600.
     
  11. Piney999

    Piney999 Member

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    That is exactly what I was looking for. Did you put a HPWC in or just a regular outlet? And charge rate did you get out of it?
     
  12. swesson

    swesson Member

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    I put in one of the new wall chargers in a couple of weeks ago. My install was quite costly since I needed an entirely new panel plus the electrical panel is very, very far from my garage. I had him wire it for 80 amps. The whole install cost me almost $3,000.
     
  13. smsprague

    smsprague Member

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    Regular outlet 240v outlet. I get 40 amps of charge, so about 29 miles an hour using my UMC.
     
  14. rdr1rx

    rdr1rx Member

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    240v NEMA 14-50, 50 amp outlet installed with permits and city inspection for $1050. Outdoor panel is directly behind the garage wall where I will park the S (arriving in a month), so installation took less than 2 hours.
    20160509_144351.jpg
     
  15. Doug4650

    Doug4650 Member

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    240 volt NEMA 14-30
    30 amp circuit, 24 amps actual, 18 miles per hour charge, about $1,000 parts, labor, permits.
     
  16. Boatguy

    Boatguy Member

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    #16 Boatguy, May 10, 2016
    Last edited: May 10, 2016
    10' run in EMT (lightweight conduit) from pre-wired 100a circuit junction box (new house), new 100a breakers and installation of the HPWC = $780.
     
  17. Frisco-Dad

    Frisco-Dad Member

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    I work from home, so I have the advantage of not needing 240V charging in my garage. There was already an existing 20A 120V plug in my garage. I get 5mph charging. On a busy day, I can drive 40+ miles running errands and helping out my wife with the carpool. If you have a 20A 120V plug in your garage, do the math to see if you even actually need to install a 240V plug. After overnight charging, I typically start the day with a full 90% charge unless I've done a lot of driving like on weekends, or coming back home after a long roadtrip. I plug in the car whenever it is parked in the garage. Even if I am home for only a couple hours before I have to go out again on another errand, that's 10 miles of range while the car is just sitting there in the garage.

    So here is some math I did before buying the model S. I drive approx 15000 miles a year. Worst case scenario, that's 3000 hours of charging at a rate of 5mph. I was skeptical before I bought the model S, but after a month of ownership, I don't think I'll need to install 240V charging.
     
  18. Boatguy

    Boatguy Member

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    I charged my i3 for a year on a 110v 15a outlet and got by OK, unless I stayed out late and departed early.

    I tried the Tesla in my garage with a 20a outlet and could not get it to take more than 12a. Does yours just snap to 20a when you plug it in? Did you have to set the current limit manually? I'm going to be at a vacation house for a month this summer and I'm guessing a 15a or 20a circuit is the best I'll find.
     
  19. Frisco-Dad

    Frisco-Dad Member

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    I bought a 5-20 adapter from tesla. Tesla — NEMA 5-20
     
  20. Boatguy

    Boatguy Member

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    Ahh. I'm just using the 110v adapter that comes with the UMC, so I guess even when plugged into a 20a circuit, but not the pin configuration you show, it won't take more than 12a? Hard to believe those little adapters have any intelligence, but apparently they do.

    I note that even the 5-20 maxes out at 16a, 20% surge/safety factor.
     

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