On Tue, Aug 20, 2019, 18:04 Willie via EV <ev@lists.evdl.org> wrote: > > > On 8/20/19 4:12 PM, EVDL Administrator via EV wrote: > > > The idea of using an EV for backup power is eminently sensible. A > 50/60Hz, > > 100/120/240v (depending on where the car is sold) inverter operating from > > the traction battery should be a factory option on every EV, IMO. > > Agreed! > > I can't cite a reference right now but I have read that a Model 3 tear > down has revealed that the power electronics includes a gridtie and > microgrid inverter. > > So far, Tesla has resisted use of their cars for V2G and V2H. But, it > appears they are prepared to make the jump. Very likely through nothing > more than a software update. I envision/hope it will go like this: > 1) Pay a fee, perhaps ~$2k > 2) Receive and install an update and follow instruction: > 3) Poke some icons on the display > 4) Plug into your 10kw-20kw Wall Connector as if to charge > 5) Switch off your main breaker > 6) Car confirms no grid and starts a micro grid. > 7) Enjoy 10kw-20kw of backup power. > > Then, people like me who mess with trying to access the battery via the > DC-DC will appear foolish. >
Agreed as well. The same functionality (V2H) would also be useful for V2V... transferring enough energy from one car to another to help them get to a proper grid-connected energy source. A set of NEMA 5-20 and 14-50 outlets would be able to cover every factory EV in the US (through another EVSE), and of course supply most home or RV loads. NEMA 14-50 can supply up to 10 kW continuous (250v x 40a). My guess is that if there is V2H/V2G capability in the Model 3, it is because the onboard battery charging equipment was designed as an inverter-charger. There is similar functionality inside a Powerwall or Powerpack, and also in grid-interactive or off-grid inverter-chargers like those from Magnum, Outback, Transverter, or Sol-Ark. With the right software and equipment, Tesla could turn their cars into mobile Powerwalls, or Powerwalls-while-at-home, all as a value-add. In low usage scenarios (emergency, camping, V2V), the lifetime extra kWh moved into and out of the pack would be insignificant compared to driving. Model 3 driving efficiency is about 250 Wh/mile (4 miles/kWh). I'm not sure about what reference you were thinking of. I did find this article although it isn't an exact match for what you described: https://www.teslarati.com/tesla-may-revisit-vehicle-to-grid-v2g-bi-directional-charging-solution/ P.S. closing thought: device to device electrical energy transfers are possible between the latest Samsung phones. I wonder if that would be considered P2P... > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190820/2189d5b2/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
