EVs supplying power to homes can cut up to 90% charging costs

https://interestingengineering.com/energy/evs-could-save-90-charging-costs

by sksarkpoes3

5 comments

  1. The problem is that you saved $5000 over the lifetime of charging your Ev. However you spent $5000 upfront for the V2H charger instead of the regular EV Charger.

    Time value of money will tell you that’s a loss.

    It’s super cool technology, and will likely be economical soon, but, like most battery based solutions to power, not yet.

  2. I think V2H is a good idea, and I’d buy it in a new car. I’d need a transfer switch of some sort.

    This hype approach seems wrong headed to me. What am I missing?

    Pros:

    + Save the cost of a home battery

    + Trade higher cost power for lower cost when its convenient to have the car at home discharging.

    Cons:

    – Reduced battery life in car, possible reduced resale value if they track battery use to cover this case.

    – Requires transfer switch

    – Organization/planning to have the car home 4-9 PM (or whatever your high-cost period is) every day.

    Best: PVs and home battery

    + No management needed.

    + Charge car during day for ‘free’, instead of paying for grid energy to charge

    – Can’t store enough energy to charge car off battery

    – + Upfront cost with payback over time.

    + Car is always charged to level you left in it.

  3. Or maybe just have a functional government that can plan ahead and fund power infrastructure society needs?

  4. I have been saying for a while that an ideal scenario for an electric car is if you commute regularly to a place of work…..

    An electric car produces no pollution while waiting in slow traffic. You know how far you are going to drive, so there is no range anxiety. Also you can charge your car at home overnight, which is cheaper and very much more reliable than attempting to find a place to charge while on a long journey.

    Unfortunately this scenario is the direct opposite of the requirements to supply power to your home. For that you need the car to be at home during the daytime to benefit from cheap solar electricity, And to be fully charged in early evening in order to power the house for cooking dinner and evening activities.

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