Consumer Energy Report is now Energy Trends Insider -- Read More »

By Russ Finley on Jun 19, 2012 with 6 responses

First Vehicle to Home Power System in North America

Nissan issued a press release earlier this month to announce that Power Stream will be using the V2H system with its fleet of Leafs in Canada. This device acts as a charger and as a power inverter, allowing 4 hour charges instead of 8 hours as well as the capacity to power a home for a couple of days in the event of a power outage. Apparently your Leaf has to have the CHAdeMO protocol quick charge port which was an option on the 2012 cars.

The price seems about right to me costing roughly twice as much as the charge stations now installed in homes but that’s still cheaper than a charge station and a backup generator system. And if you live where there is a significant price difference for night electricity use it can defer some of its cost as well.

From the press release:

  • The EV communicates directly with the utility or with the home energy manager to help manage electricity consumption;
  • The EV acts as a back-up power source in the event of a power outage;
  • Time-of-Use demand response scenarios where devices in the home like the refrigerator, washer/dryer and EV charger react to changes in the prices of electricity based upon the time of day.

Click here to see a video presentation.

I’ve got this on my wish list when they become available in the States. Combine this with solar panels to keep the car charged and you could weather a power outage for as long as you can get enough sunshine. I could also see these units being sold at car dealerships. Instead of opting for leather seats, you might opt for a home power system.

  1. By shecky vegas on June 20, 2012 at 5:38 pm

    Don’t forget the potential of a VAWT, if your area allows it.

    • By Russ Finley on June 20, 2012 at 8:04 pm

      I looked into windmills years ago and concluded that they are not viable at the residential scale, which probably explains why there are so few of them.

  2. By Herm on June 23, 2012 at 8:29 am

    It is a practical emergency generator.. but never for routine load shifting since the batteries are expensive wear items.

    The Leaf is having issues with premature capacity loss in Phoenix and other hot places, there have been about 20 reports in the last month of 15% battery capacity loss in the first year of ownership. Owners in coastal California have seen about 5% capacity drop in the same time. 


  3. By Russ Finley on June 23, 2012 at 11:02 am





    New brand of whiskey:



     Hello Herm,


    RR’s book mentions the potential of a $40 billion dollar market in the coming decade paying electric car owners for use of their batteries to load shift. The payment would have to be big enough to offset battery depreciation, as is the case with any rental.


    In addition, a market  may exist for use of the old battery for grid storage, further adding to the car’s end of life value.


    I also envision much better battery technology that may create an aftermarket to replace old batteries. An electric motor may have a much greater lifespan than a conventional reciprocating engine. There may be a significant used market for electric cars with replaced batteries.


    The capacity loss was anticipated and not linear over the life of the car. Range varies a great deal depending on outside air temperature, also anticipated and explained in the warranty and owner’s manual. To date, the number of cars claiming reduced capacity is less than half of a percent of the cars sold.


    I also  wonder how an owner managed to measure loss of capacity considering how much the range varies day to day. They may recover some of that lost range in cooler weather.  For now, take it with a grain of salt like  the early Prius rumors about range and battery life.


    • By Herm on July 8, 2012 at 9:37 pm

      The Leaf has a display for battery degradation in the dash, it is a set of 12 tick marks to the right of the charge remaining bars.. the first tick mark is 15% loss and the following ones are 6% .. so far all the people reporting this reside in Arizona and Texas, none in California. 

      There are several reports of people losing two capacity bars already, thats about 21% loss in a bit more than a year, Nissan had stated that was the expected degradation in 5 years. 

      So far the correlation seems to be with temperature only.. dont forget the Leaf does not have an active cooling system for the battery pack.  I expect an expensive recall for Nissan. 

      • By Russ Finley on July 9, 2012 at 9:35 pm

        Quite possible that temperatures above the asphalt in some places exceeds the 120 degree limit specified in the owner’s manual. Maybe we will see a temperature management system option for hot climates in the future.

Register or log in now to save your comments and get priority moderation!