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While I agree with your conclusion, I would argue how you got there is a bit faulty. EDIT: I misead the article. I don't necessarily think Tesla is in the right

by kop316 6y ago

While I agree with your conclusion, I would argue how you got there is a bit faulty. EDIT: I misead the article. I don't necessarily think Tesla is in the right about this, especially voiding your whole warrenty. Car Maker's typically don't make the 12v battery, some third party does, and the warrenty is typically through the third party. A typical 12v car battery is also lead acid, and a lead acid battery behaves radically different as comapred to the lithum batteries with charging and discharging, and lead acid batteries age differently too. I would have no problem "abusing" a 12v lead acid battery (and there are plenty of sites out there to show how to store energy for your home using them), but I would not want to attempt that with a lithium battery. Why? Without the proper charging/discharging circuitry, those things can catch fire (thermal runaway), and that can't happen on a lead acid battery. However, I would argue that due to the aging of the battery combined with the danger of adding third party discharging circuitry, I would agree that this would void the warrenty, as I would imagine the car cannot now monitor the aging of the battery now. I would not be happy to get a used tesle to know that the battery is significantly more aged than what is reported. EDIT: I apperently misread the article, and assumed the inverter was being hooked up into the Tesla battery, but Tesla has a 12v lead acid battery. Re-reading the article, I am actually surprised about this now. Tesla is voiding the warrenty from using the 12v lead acid battery, NOT the primary lithium battery. This may actually be illegal under the Magnuson–Moss Warranty Act.

derekp7 6y ago
Lead acid batteries can explode though. The one hooked to the backup sump pump in my parents' house had went kaboom when I was a kid, scared the crap out of me (quite literally in this case).
- kop316 6y ago
  Was this an old lead acid battery (I ask because you say "when you were a kid")? That was more common in ones where they were not sealed, and you had to add water to it occasionally. Modern lead acid ones are completely sealed, and should not have that issue.
  - jsight 6y ago
    Modern lead acid batteries can still vent hydrogen, which can be a risk in an enclosed space.
    - kop316 6y ago
      Interesting, I did not know that. thank you!
  - derekp7 6y ago
    Yes, it was back in the 80's. But even as recently as a year ago I was looking at backup sump pumps, and the ones at the local big box store had the lead battery separate, plus you had to buy the acid in a separate bottle that you add in with distilled water. I do recall that the battery was split open and its guts had hit the ceiling.
- dreamcompiler 6y ago
  That was because it vented hydrogen in an enclosed space; the lead itself didn't explode.
  - derekp7 6y ago
    Of course the lead didn't explode, that is why I said the battery exploded.

by kop316 6y ago

derekp7 6y ago

Lead acid batteries can explode though. The one hooked to the backup sump pump in my parents' house had went kaboom when I was a kid, scared the crap out of me (quite literally in this case).

kop316 6y ago
Was this an old lead acid battery (I ask because you say "when you were a kid")? That was more common in ones where they were not sealed, and you had to add water to it occasionally. Modern lead acid ones are completely sealed, and should not have that issue.
- jsight 6y ago
  Modern lead acid batteries can still vent hydrogen, which can be a risk in an enclosed space.
  - kop316 6y ago
    Interesting, I did not know that. thank you!
- derekp7 6y ago
  Yes, it was back in the 80's. But even as recently as a year ago I was looking at backup sump pumps, and the ones at the local big box store had the lead battery separate, plus you had to buy the acid in a separate bottle that you add in with distilled water. I do recall that the battery was split open and its guts had hit the ceiling.
dreamcompiler 6y ago
That was because it vented hydrogen in an enclosed space; the lead itself didn't explode.
- derekp7 6y ago
  Of course the lead didn't explode, that is why I said the battery exploded.