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View Diary: We are now solar powered - car included! (161 comments)

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  •  The EV will add a fair amount of kilowatt hours (1+ / 0-)
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    joelado

    If the system is sized to match your current usage on an annual basis, then the vehicle will cause you to still be relying an some grid power on an annual basis. Depends on how many miles the vehicle is driven of course....

    Have fun monitoring this. You will learn a lot!

    "So, am I right or what?"

    by itzik shpitzik on Thu Jul 12, 2012 at 08:34:16 AM PDT

    •  We calculated that in. (1+ / 0-)
      Recommended by:
      joelado

      There are a lot of assumptions and guestimates involved, but we looked at how many miles my wife has driven over the last ten years, added about 30% to that for the fact that the Nissan will be our primary around town car, rather than a secondary one, then figured how many kilowatt hours that would take and added it to prior electric usage.
      And if the production is inadequate we do have a cheap way of increasing it by doing a little judicious pruning on some of the trees around the house.

      "Wouldn't you rather vote for what you want and not get it than vote for what you don't want - and get it?" Eugene Debs. "Le courage, c'est de chercher la verite et de la dire" Jean Jaures

      by Chico David RN on Thu Jul 12, 2012 at 10:48:19 AM PDT

      [ Parent ]

    •  Don't forget time of use savings (0+ / 0-)

      Sell solar energy to the utility when kilowatts are expensive.

      Charge the vehicle using the utility's kilowatts when they're cheap (overnight).

      A Nissan Leaf has a 3.3 kW charger, and a 24 kW battery pack.  So while that may suggest 7.2 kWhs of charging every time, in reality you don't run the leaf down to completely empty.  My typical charging session is when the Leaf is anywhere from half to two thirds drawn down, and my typical charging session (which I don't do every day) is in four hours or less (this is with 30A 240V home charging equipment).

      According to Consumer Reports, a 70 mile Leaf trip would cost $2.44 in electricity at 11 cents a kWh.  So at 34 cents, absolute worst case, that trip would cost $7.32.  Obviously with solar, the cost is going to be a lot less.

      In capitalist America, bank robs you!

      by madhaus on Thu Jul 12, 2012 at 11:17:58 AM PDT

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      •  Yah, that's part of the plan (0+ / 0-)

        The time when we generate the most is during peak use hours, and we'll charge the Leaf at night, during the cheapest times.  Hopeful it all works out about right.

        "Wouldn't you rather vote for what you want and not get it than vote for what you don't want - and get it?" Eugene Debs. "Le courage, c'est de chercher la verite et de la dire" Jean Jaures

        by Chico David RN on Thu Jul 12, 2012 at 12:28:27 PM PDT

        [ Parent ]

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