There's no sense in trying to fix something that ain't broke.
Tesla batteries (all batteries) degrade with age, and we should not be unreasonable in expectations. Some of us put more stress on the batteries than others.
Still, batteries do fail. I want to know the signs.
I want to get your comments on my list of signs that the battery is declining in an abnormal way. Also, I include items which in my opinion are NOT signs of battery decline. So here is my list.
1) People seem very interested in how much energy the car uses per mile, but I believe this has very little to do with your battery condition. If my car used to run at 275 per mile and now it runs at 380, maybe I have a problem with my motors, or tires, or I have gained weight, or it's hotter, or my wheels are out of alignment. Any of these will use up the battery more quickly, but not because it's a degraded battery. To get good answers about the battery, I think maybe you need to be sure the conditions in which you are running your car are the same in these ways. Before thinking about the battery be sure these things have not changed between your experiments.
2) Having dealt with 1 above, suppose your range traveled by your odometer is very much less than your range traveled according to the "miles left" display on your dash. For example, if I charge to say 284 miles (86% of my 330 original capacity) and then I drive until I have 184 miles left, so 100 miles traveled, but by the odometer I have traveled only 70 miles, that might be a red flag. However, again a warning about number 1 above: Your car's range by the display will not be accurate if you are carrying your 400 pound horses in back seat uphill on a 100 degree day while stopping overnight halfway.....UNLESS you used the same conditions when the car was new! The key here is this: devise a test that you can repeat easily.....AND be sure your car is dealing with same conditions, inside and outside.
3) Suppose your maximum battery capacity declines substantially. Unfortunately, Tesla may hide this by putting an invisible cushion at the top so that you can still "charge to full capacity" even if the battery has degraded. Still, if your max has declined so substantially that in no longer charges to the original max, that might be a sign, but only if it is extreme. I wish somebody could tell me how much decline in my max is enough to discuss it with Tesla service. I also wish it did not degrade the battery to test it by fully charging it! (Maybe only do this once every few months....) In my own case, my battery no longer fully charges to 333 the way it did the first time. But it still charges to 228.
Anyway, those are my thoughts. What are yours. I am particularly interested in some tests which can help me know if my battery is doing ok or should definitely get me to check with Tesla.
Cheers,
gScargo
PS If my battery catches fire, do you think that might be a sign? ( ! ! )
Tesla batteries (all batteries) degrade with age, and we should not be unreasonable in expectations. Some of us put more stress on the batteries than others.
Still, batteries do fail. I want to know the signs.
I want to get your comments on my list of signs that the battery is declining in an abnormal way. Also, I include items which in my opinion are NOT signs of battery decline. So here is my list.
1) People seem very interested in how much energy the car uses per mile, but I believe this has very little to do with your battery condition. If my car used to run at 275 per mile and now it runs at 380, maybe I have a problem with my motors, or tires, or I have gained weight, or it's hotter, or my wheels are out of alignment. Any of these will use up the battery more quickly, but not because it's a degraded battery. To get good answers about the battery, I think maybe you need to be sure the conditions in which you are running your car are the same in these ways. Before thinking about the battery be sure these things have not changed between your experiments.
2) Having dealt with 1 above, suppose your range traveled by your odometer is very much less than your range traveled according to the "miles left" display on your dash. For example, if I charge to say 284 miles (86% of my 330 original capacity) and then I drive until I have 184 miles left, so 100 miles traveled, but by the odometer I have traveled only 70 miles, that might be a red flag. However, again a warning about number 1 above: Your car's range by the display will not be accurate if you are carrying your 400 pound horses in back seat uphill on a 100 degree day while stopping overnight halfway.....UNLESS you used the same conditions when the car was new! The key here is this: devise a test that you can repeat easily.....AND be sure your car is dealing with same conditions, inside and outside.
3) Suppose your maximum battery capacity declines substantially. Unfortunately, Tesla may hide this by putting an invisible cushion at the top so that you can still "charge to full capacity" even if the battery has degraded. Still, if your max has declined so substantially that in no longer charges to the original max, that might be a sign, but only if it is extreme. I wish somebody could tell me how much decline in my max is enough to discuss it with Tesla service. I also wish it did not degrade the battery to test it by fully charging it! (Maybe only do this once every few months....) In my own case, my battery no longer fully charges to 333 the way it did the first time. But it still charges to 228.
Anyway, those are my thoughts. What are yours. I am particularly interested in some tests which can help me know if my battery is doing ok or should definitely get me to check with Tesla.
Cheers,
gScargo
PS If my battery catches fire, do you think that might be a sign? ( ! ! )