No and you would also be putting stress on the 12v battery.If I were to travel and leave the car back for two weeks, do I correctly assume that I'm better off leaving the battery empty-ish rather than fully (80%) charged?
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No and you would also be putting stress on the 12v battery.If I were to travel and leave the car back for two weeks, do I correctly assume that I'm better off leaving the battery empty-ish rather than fully (80%) charged?
Charging to 100% 2x a month whether you need it or not is just uninformed advise from an uninformed employee.I think the no more no less refers to doing this 2x per month, not 100%...
Generally you don't want to leave it above 90% for any length of time. Charging to 100% just before a trip is fine. I do it on every trip.What if you went to 99.999%. Technically not 100%.
No and you would also be putting stress on the 12v battery.
How does the resting SOC of the main pack have anything to do with the 12v system? The accessories will draw down the 12v battery, and the DC-DC will have to come on from time to time to top it up, but there is no relationship between this and the SOC of the main pack AFAIK.
Perhaps at a low SOC, the system will be less "willing" to top-off the 12V (do it less often to conserve range), thus the assumption that a higher SOC on the traction battery will keep the 12v more topped-up? I don't know...just a guess.
I'll trust my Tesla service advisor's advice, who has been a close friend for many years prior to working at Tesla. Uninformed he is not. He sees these cars on a daily basis and has worked for Tesla for several years. He is the one who has been trained by Tesla and knows the car better than I do. If he tells me to charge my car to 100% twice a month whether I need to or not, I'm gonna do it.Charging to 100% 2x a month whether you need it or not is just uninformed advise from an uninformed employee.
I'll trust my Tesla service advisor's advice, who has been a close friend for many years prior to working at Tesla. Uninformed he is not. He sees these cars on a daily basis and has worked for Tesla for several years. He is the one who has been trained by Tesla and knows the car better than I do. If he tells me to charge my car to 100% twice a month whether I need to or not, I'm gonna do it.
My car is an MS85 and has 15000 miles on it and has not lost one mile in range since it was new. So there.
It's bad info. Ask your friend to put it in writing on Tesla letterhead and I guarantee he won't do that. That should tell you something. Forewarned is forearmed. Good luck!!!I'll trust my Tesla service advisor's advice, who has been a close friend for many years prior to working at Tesla. Uninformed he is not. He sees these cars on a daily basis and has worked for Tesla for several years. He is the one who has been trained by Tesla and knows the car better than I do. If he tells me to charge my car to 100% twice a month whether I need to or not, I'm gonna do it.
My car is an MS85 and has 15000 miles on it and has not lost one mile in range since it was new. So there.
My undertanding is that at lower charge states the 12v won't pull from the main battery and the poster is talking about not plugging in and leaving the battery "empty-ish".How does the resting SOC of the main pack have anything to do with the 12v system? The accessories will draw down the 12v battery, and the DC-DC will have to come on from time to time to top it up, but there is no relationship between this and the SOC of the main pack AFAIK.
Some Service Advisors will tell people to run the battery down below 20-30% and then charge to 100% occasionally to rebalance the battery algorithm. I personally do that but going outside what's in the manual could come back to bite you if there's a warranty issue.Sorry, but if this has any merit, I should think they would include in the manual.
Also, I would assume others would get the same information from their Service Centers, but that seems not to be the case. Don't think it will do damage to the battery, but I bet it won't maintain it either.
I have a MS75, it has 12 000 miles on it, it has been charged to 100% twice in 7 months, no loss either.
I tried this for awhile. The results were not pretty. I was running down to about ~10% then supercharging to 90% once a week for about 2 months. During this period I was losing 1 Rated Mile (RM)/week. I've stopped doing that now (if it hurts, stop), and for the last couple of months I have not lost any RM. Now I charge using my UMC everyday. My daily commute takes me from 90% to 60%.What happens if you only charge to 90% BUT go below 20% on a regular basis?
Going below 20% is perfectly fine. Even at 0% the battery still has about 4% left (I'm not making this up, the CAN bus shows that data). The only thing you want to avoid is hard acceleration and using full power at low battery levels. Other than that, discharging to a low level is fine. Just out of safety I would always aim to arrive at a charger at 10%. Unpredictable things happen so you always want a safety buffer.What happens if you only charge to 90% BUT go below 20% on a regular basis?
Even at 0% the battery still has about 4% left (I'm not making this up, the CAN bus shows that data). The only thing you want to avoid is hard acceleration and using full power at low battery levels. Other than that, discharging to a low level is fine. Just out of safety I would always aim to arrive at a charger at 10%