Just added a M3 and became a two Tesla family.
We had planned to add a second HPWC, having the two load-share our 100A circuit. Would be convenient: Come home, plug in, and forget. It would be nice to have a spare HPWC if one went down ... which has happened to us in the past. And, local utility rebate would cover cost of HPWC.
However, higher than expected installation cost ($850+, if properly permitted and inspected) has given us pause.
Neither my wife nor I have long commutes, so one HPWC provides plenty of charging capacity. We just have to remember to swap plugs at some point during the evening.
We do wonder, though, about the importance of “a plugged-in Tesla is a happy Tesla” advice. The high-voltage battery is supposed to connect and top up the 12V battery, as needed. However, is it clear that this happens as frequently and consistently when the car is not plugged in? Might the surprising durability of our 12V battery (almost three years, so far) be due in part to keeping the car plugged in all night every night?
Would love to hear people’s opinions (good) and experiences (better)!
Thanks!!
We had planned to add a second HPWC, having the two load-share our 100A circuit. Would be convenient: Come home, plug in, and forget. It would be nice to have a spare HPWC if one went down ... which has happened to us in the past. And, local utility rebate would cover cost of HPWC.
However, higher than expected installation cost ($850+, if properly permitted and inspected) has given us pause.
Neither my wife nor I have long commutes, so one HPWC provides plenty of charging capacity. We just have to remember to swap plugs at some point during the evening.
We do wonder, though, about the importance of “a plugged-in Tesla is a happy Tesla” advice. The high-voltage battery is supposed to connect and top up the 12V battery, as needed. However, is it clear that this happens as frequently and consistently when the car is not plugged in? Might the surprising durability of our 12V battery (almost three years, so far) be due in part to keeping the car plugged in all night every night?
Would love to hear people’s opinions (good) and experiences (better)!
Thanks!!