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How soon before SPWC for home use?

Discussion in 'Model S: Battery & Charging' started by pilotSteve, May 11, 2015.

  1. pilotSteve

    pilotSteve Member

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    Thinking that with PowerWall in your garage you could have access to ~400VDC from the PowerWall. Wouldn't it be cool if Tesla offered a "super" power wall charger (hence SPWC) fed from the PowerWall and your solar panels.

    Sure you can use DC->AC->DC with HPWC but it should be 10-15% more efficient as pure DC-DC and quite possibly offer faster charging.

    Home Supercharger anyone?
     
  2. TexasEV

    TexasEV Active Member

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    How often would anyone need to charge their car that quickly at home? Most people don't come come with a nearly depleted battery and leave for a 200 mile trip an hour later.
     
  3. kuttakamina

    kuttakamina Member

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    No, but you could come back from a long trip, and may have to make a quick trip to run errands immediately after. I love the idea of a SPWC, throwing in another idea - let us use our Teslas as batteries for our homes.
     
  4. NEWDL

    NEWDL R#350 R#1323 Sig23 8136

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    ok, in that same realm of thought, why can't we "jump" each other and transfer X miles of range from one Model S to another?

    DC to DC?
     
  5. stevezzzz

    stevezzzz R;SigS;P85D;SigX

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    The PowerWall is spec'd for a max output current of 2kW continuous, not even close to a 'fast DC charge. Don't know why, but there it is. :frown:
     
  6. Fiver

    Fiver Member

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    #6 Fiver, May 11, 2015
    Last edited: May 11, 2015
    I think this is actually more interesting. While most everyone has no need for "supercharging" speed at home, would a slower straight DC charge connection be more efficient off of Tesla DC home batteries tied to DC solar?
     
  7. Stoneymonster

    Stoneymonster Active Member

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    That's likely the ceiling on the inverter. DC-DC would bypass this. Still, you'd have to have a pretty big stack of these for anything more than a fractional charge.
     
  8. glhs272

    glhs272 Unnamed plug faced villian

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    For this we would basically have to start out with the 100kwh Powerpack, not the power wall. But at $25,000 it's not all that bad, considering what most DC chargers like Chademo go for. That price just gets you the pack, but a big chunk non the less. When you consider what a supercharger site install goes for, perhaps an integrated DC only supercharger/Powerpack on a pallet system might be a good deal for low utilization superchargers. The possibilities are mouth watering.. These in the wild superchargers could be temporary, or only connected with a small standard 100amp to 200amp grid connection, like a typical house.
     
  9. Rockster

    Rockster Active Member

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    I've thought about that. It seems technically quite feasible. I wonder, however, if Tesla believes that the mainstream media would spin the announcement of a Tesla-to-Tesla charge cable as an indicator that we need to frequently rescue one another, thus amplifying the uninformed publics' unfounded range anxiety.
     
  10. chriSharek

    chriSharek Member

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    These are all great ideas. Love the SPWC idea but using the car as a house backup for the Florida Hurricanes would be amazing! :)
     
  11. Dbitter1

    Dbitter1 Journeyman Member

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    Uhm.... we are Tesla owners here (or enthusiasts, I suppose). Please don't apply the logic of the common masses; otherwise, we'd all be driving ICEs.

    "The reasonable man adapts himself to the world: the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man." - George Bernard Shaw
     
  12. N4HHE

    N4HHE Member

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    What would be the point of "super" charging only 7-10 kWh, even if we could?
     
  13. redi

    redi 2013 P85+ with HumanPilot Technology

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    I'd rather have an option to plug my Tesla in (where my gas generator attaches) so I could power my house during short power outages from my 85kwh "rolling Powerwall" I already have in the garage.
     

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