If you are going to routinely leave any car, EV or not, parked without attention for more than 2 weeks routinely, I advise a 12v battery switch be installed on the negative lead. Most EVs, including Teslas, will be OK like this for many months. If you store a Tesla at 30-70% with the 12v battery disconnected and the HV pack off, it will be OK for at least a year.
On Mon, Aug 26, 2024 at 10:51 AM Cor van de Water via EV <ev@lists.evdl.org> wrote: > First of all, charging and discharging the batteries in the middle of > their range hardly affects the life of the batteries at all. > If for some reason you want to fully power off the Tesla and let it > sit for months without looking at it, and you can have a jump start > available when you return (even the pocketbook sized USB jump start > will work for this) then do the following: > - Open the frunk > - remove the top plastic cover along the windshield, you should now > see the top of the 12V battery and the Emergency Disconnect loop > - use a 10mm wrench and disconnect the negative battery terminal and > put it aside, not contacting metal > - use a small flat blade screwdriver and pull open the Emergency > Disconnect, you will hear the contactors drop, the car is now dead. > - push the Energency Disconnect back together so as soon as 12V is > restored, the contactors can close again > - Before you close the frunk, pry the nose cone off and connect the > Jump points to a 12V battery and watch the car come back alive again > (I forgot to do this and so I found out later that the Jump fuse was > blown from trying to start an ICE car from the jump points previously, > I did not know they have a 50A fuse) > - disconnect the battery from the jump points, pry the Emergency > Disconnect open and closed again once more so the car is again dead > - stuff the plastic cover back in place or throw it in the car and put > the nose cone back in place > - car can now sit for months without losing a single mile of range, > just needs a jump when you return. > > I was able to regain access to the car myself with a scrap piece of > metal strip and use the manual frunk open handle under the glove box > to regain access to the 12V battery and power up the car again. > I also found out that Tesla has all fuses on top of the battery in 2 > layers, bolted down with 8mm lock nuts and the *center* bolt will fall > out when you undo those lock nuts to reach the Jump fuse. The service > manual warns for a bolt falling out, but says it is the lowest bolt. > It is not. I am still searching for the small plastic piece that falls > out with the bolt, otherwise the fuse is no longer bolted down, but > the wire will pull directly on the fuse itself, which is a failure > waiting to happen. Sigh, why does Tesla want to re-invent everything? > Cor. > > On Mon, Aug 26, 2024 at 7:46 AM Ken Olum via EV <ev@lists.evdl.org> wrote: > > > > From: "(-Phil-)" <p...@ingineerix.com> > > Date: Sun, 25 Aug 2024 19:53:48 -0700 > > > > What model? If it's an older S/X then unfortunately they don't have > the > > hardware to sleep fully. > > > > Yes, it is a 2015 Model S, so that explains it. > > > > If it's plugged in, then it will take it from the wall when SoC drops > > a bit. > > > > It does this, but it does it by starting a charging cycle and charging > > to 70% or whatever I configure it for. This seems to needlessly > > discharge and charge the batteries over range of a few percents. > > > > Ken > > _______________________________________________ > > Address messages to ev@lists.evdl.org > > No other addresses in TO and CC fields > > HELP: http://www.evdl.org/help/ > > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240826/e7c656db/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
