Reading all these news items (some good, some anti-EV, some overunity-odd/silly, and some just plain unworthy of one's time, etc.), lead me to think ...
... with both Tesla and Nissan (and a few other minor players) re-purposing their under 80% capacity packs (that came from driver replacements), and with both of them in the 'power-wall' market game (selling electricity storage units for businesses, and other uses, etc.) ... http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Nissan-s-V2G-UK-network-power-wall-competitor-v-tp4682089.html Why aren't they installing these power-walls at well used L3 EVSE stations? Is there a major utility complaint that highly used L3 EVSE puts a high demand on the grid? That the EV's power demand during peak HVAC power periods are counter productive? Isn't there also some complaining that there is a lack of electrical storage from renewable sources that produce during non-peak times? And what about the V2G and V2H crowd, working with utilities to do the software & hardware R&D to let the utilities control whose EV pack they can tap? When I look at a well laid out/designed Tesla Supercharging site https://electrek.files.wordpress.com/2016/03/tesla-supercharger-newark.jpg?w=1000 it shows me there is so much space to put these power-wall units in place at those sites. If well used CHAdeMO and combo L3 sites also had a similar layout (and perhaps located on either side of a small 24.hr shopping center to give drivers something to do, etc.) and large amount of electrical power could be controlled to keep the EVs charged, keep the grid happy during peak periods, and smooth the power generation during off-peak period (when the wind is blowing in the middle of the night, etc.), (+more) ... http://rameznaam.com/2015/04/14/energy-storage-about-to-get-big-and-cheap/ So, I suppose the next step is to know how much electrical power is used at these L3 EVSE. I will assume (for easy calculations sake) that each L3 EVSE (either Tesla's or CHAdeMO/combo) draw 50kW. In the (above) image 12 Tesla EVs can be charging at one time (Tesla uses some smart circuitry, so each may not be push 50kW, but lets assume at some time they will to make the math easier). I know some Supercharge sites are smaller ... http://insideevs.com/wp-content/uploads/2014/12/IMG_1148-1.jpg but when the Tesla-3 EVs, and their competing 200mi EVs are in production & for-sale, there is going to be a whole lot more L3 EVSE charging going on. So how much power-wall-ish storage is needed? If it takes two hours to replenish a Tesla to 80% @50kw (after 80% SOC the charging current drops dramatically), and the grid is usually subject to an 8hr period of peak demands during our now hotter climate (more HVAC/air-conditioners running) from 12n to 8pm https://blog.opower.com/wp-content/uploads/2012/09/Peak-between-3-7pm-larger-font1.png Doesn't this mean 4 power-wall units, each with the capacity of a 200mi EV need to be available for each L3/supercharger EVSE? That is going to be a lot of up front investment cost, but if they could make money at it, this move could also fund installing solar at those L3 sites (which would also help lessen the load on the utility grid). I am sure my idea is not a new one. And if I find any EV related items on this, I will post them for all to read. For EVLN EV-newswire posts use: http://evdl.org/evln/ {brucedp.150m.com} -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Old-packs-as-powerwalls-L3-EVSE-sites-to-help-smooth-out-the-grid-more-tp4682104.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
