Level 2 vs level 1 charging

[Smartshot]

For battery life (over period of years) is it better to charge at 120 or 240 volt if charge time does not matter?

 

[Stoaty]

For battery life, both 120 volt and 240 volt are considered "slow" charging. There won't be any difference over years.

 

[planet4ever]

But if you are concerned about your utility bill, it is becoming quite obvious that 120v charging is significantly less efficient. There may well be twice the loss from wall to battery, or even more. The latest calculation: 68% vs. 87% efficiency. (See tbleakne on Sep 14.)

Ray