So, if they are losing 8 miles of range a day, that roughly translates into 100 watts of draw just sitting there, "off". That seems like very poor electronics design to me.
Z Sent from my iPhone On Jan 3, 2013, at 9:49 AM, brucedp5 <[email protected]> wrote: > > Reduce parasitic losses when parked & not plugged in > less bricking > > http://www.technologytell.com/in-car-tech/903/tesla-software-update-returns-more-miles-per-charge/ > Tesla Software Update Returns More Miles Per Charge > by Lyndon Johnson Dec 29 2012 > > Tesla Motors released a software update for its Model S EV that should see > the cars waste less of their batteries’ juice on parasitic losses, thereby > allowing owners to eek out a little more range between charges. (Photo > courtesy Tesla Motors.) > > Tesla released a software update for its much-praised Model S electric car > recently that should help owners eek a few extra miles out of each charge of > the car’s batteries. > > According to CleanTechnica, the Tesla Model S loses about eight miles of > driving range for every day it is parked without being plugged into a > charger. That equates to 56 miles per week or 240 miles per month. In the > Model S with the larger 80 kWh battery pack, this means the Tesla loses > about 2.6% of its charge every day it is parked off-charger. And as The > Green Optimistic notes, if you park a fully-charged 40 kWh Tesla Model S for > a month without plugging it in, it will be stone dead. > > The loss comes from parasitic drain, something common to most electronic > devices nowadays, from your DVD player to the computer or mobile device > you’re using to read this. Much like those devices, the Tesla Model S > doesn’t truly turn all the way “off” when parked. Some battery power is used > to maintain settings of the car’s electronic features, including the > touchscreen center stack and electronic instrument panel. > > According to Tesla’s notes on the software update release, “With this > release, Model S will power off the display and vehicle electronics each > time you exit, transitioning to a ‘sleep’ state. When you return to Model S, > you’ll note a modest increase in the time it takes the touchscreen and > instrument panel to wake from this energy-saving state. Model S will > initiate the startup process the moment the key is recognized nearby. You > can only begin driving once both displays are ready.” > > The change will reduce parasitic losses in Teslas parked without access to > charging facilities. However, if you’re the type to store your keys in or > near the car, you may not see any benefit, as the car will “wake up” from > its “sleep mode” when it detects the key is nearby. (And hopefully if you’re > keeping your keys in your Tesla Model S, said Model S is securely locked > away in a private garage, for your sake!) > > While some sources referenced a press release on the software update, a > Tesla Motors media contact said no such press release was issued and > suggested instead that the details came from software release notes issued > to owners to explain to them the features of the software update. > > Like all Tesla software updates, Tesla owners should expect the update to > download to the car’s system anytime the car has reliable 3G or WiFi > connectivity. Installation of the updates– which will “brick” the car and > make it unusable for a short period of time– can be scheduled to take place > at a later time when the owner is sure the car will be parked for a long > stretch. > [© 2012 GadgeTell] > > > > > For all EVLN posts use: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/template/NamlServlet.jtp?macro=search_page&node=413529&query=evln&sort=date > > Here are today's archive-only posts: > > EVLN: $600k ebuses for Apple, LAX & Stanford U. r:155mi ts:100kmph > EVLN: Edison2 has developed an electric car rated at 245mpge > EVLN: Electric Scooters From ZEV > EVLN: 2012 EVs and pih That Will Change Tomorrow > + > EVLN: 2013 smart fortwo electric drive, 1st Impressions 0-100kph:11.5s > > > {brucedp.150m.com} > > > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Tesla-Software-Update-Returns-More-Miles-Per-Charge-tp4660323.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 > For EV drag racing discussion, please use 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 For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
