Wrenches I agree with Brian, l get this question from customers all the time going back many years. First of all, my questions in responce start with why, maybe peak load sheding ok, second question now what, you did the peak shed now you need to recharge that battery. Last thing you you should do is deplete the range your car has and cycling of the battery does also have an prolonged reduction in life cycle of the battery. Who would want to warranty that. Sure it might sound like an untapped resource, maybe end of the world stuff when nothing matters but would you such all the gas out of your car to run your house, then what, not me. Not a good long term solution
On Feb 22, 2017 10:00 AM, "Brian Teitelbaum" <[email protected]> wrote: Hi Larry, This is not a new idea. It’s called “Vehicle-to-Grid” or “V2G”, and is a big subject of discussion in Europe. If everyone had an electric vehicle in their driveway, it would represent a huge (yuge?) distributed battery bank over the whole country. I think that’s a great idea. As far as I know, the SolarEdge “StorEdge” 7.6 kW inverter is the only inverter with this capability right now, although many other inverter companies are working on inverters that can operate with high-voltage batteries. The StorEdge is designed to work with the Tesla home battery, which is basically a smaller version of the Model-S battery pack. The inverter would have to be programmable to work with the battery’s BMS, and limit the discharge so that the vehicle’s battery is only drained to some set-point. You wouldn’t want to completely drain the battery, at least not if you want to use the vehicle. I doubt that it would make any economic sense at this point in time, but the future is bright. Brian AEE Solar *From:* RE-wrenches [mailto:[email protected]] *On Behalf Of *Starlight Solar Power Systems *Sent:* Wednesday, February 22, 2017 11:17 AM *To:* RE-wrenches *Subject:* [RE-wrenches] Discharging a high voltage battery Hello Wrenches, Someone has asked me about discharging their EV battery into the grid. They have an existing grit tie system. What they want to do is connect a 5kW grid tie inverter to their 340 volt, 32kWh EV battery bank and feed the grid to discharge the battery. Why was not discussed but sure bugs me. My uneducated guess is the inverter will be immediately damaged. My thought is how would it limit the input current? Or, is there such an inverter available that can do the job? Any input is appreciated. Larry Crutcher Starlight Solar Power Systems _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]. org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
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