I believe there may be two main reasons: a) is that they may be waiting the right moment, that will boost other Tesla news etc. Probably when launching the truck.
b) may be more of a complex software and business strategy to successfully deploy it among all existing M3 owners and especially EV fleets. Like for example: updating the car software to show new screens with graphs and databases with buy/sell schedules while plugged in, similar the phone and web apps to monitor KWh/$ earned. And of course Including legal just like Lee Hart mentioned it. I know all commercial ‘grid tie’ products in the market, must pass certain electrical tests to ensure they can safely disconnect in case of over/under voltages, changes in frequency, etc. And I can also see two different approaches: one would be the grid tie service (I believe this will be the biggest target) and the second will be off-grid to give the M3 ability to work as a stand-alone AC generator (power blackouts, camping, etc.) The firs one could also easily even work without any house electrical modification, everything thru the L1 or L2 EVSE. As a power generator, EVSEs would have to be different than actual ones to ‘receive power’ from the M3 before powering AC devices. Or maybe they will come up with a special AC outlet that will plug right into the charge port. It could even work like Rivian, to provide charge from one M3 to any other EV on the road. With regards the cost, I actually was surprised the way they designed the whole ‘penthouse’ area (how I heard it’s been called); they packaged the onboard charger and DC-DC converter into one sole PCB, and next the HV contactors and a ‘country/region AC adapter PCB, saving lot of money on individual HV and LV wiring and connectors, avoiding use of individual cooling loops, coolant hoses & fittings, mounting brackets and die-cast metal enclosures like most other OEMs use to do (individually packing each component, find a mounting location and then interconnect everything) They used only one piece ‘cold plate’ to remove heat from all hi-pwr semiconductors, transformers and coils, the design from my point of view was awesome and the best I’ve ever seen. Probably the bi-directionally feature may add cost, yes. But all other improvements and efficient packaging they did seems to me that they beat all competitors cost over all. Sent from my iPhone > On Jul 29, 2019, at 1:27 PM, Lee Hart via EV <ev@lists.evdl.org> wrote: > > From: Alan Arrison via EV <ev@lists.evdl.org> >> It seems odd Tesla would have that capability available and not mention >> it. It seems like it would add cost. >> >> I was thinking more about an off board inverter that would connect to >> the vehicle fast charge port. > > > Perhaps it is a legal issue? In most parts of the US, the local power > companies sought (and were granted) a legal monopoly on selling electricity. > 100+ years ago, they wouldn't wire your city unless you gave them a monopoly > on selling power. > > So pushing power back into the grid has been interpreted as "selling" power > by some lawyers. > > > -- > Excellence does not require perfection. -- Henry James > -- > Lee A. Hart http://www.sunrise-ev.com > _______________________________________________ > 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) > _______________________________________________ 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)
