Rat wrote:I typically drive < 5 mi. before noon and then the car sits all day and all night. I would think that I could charge off 110V house current just fine, but the question of how that affects battery life was not addressed in this info. It's still not clear to me whether this approach is permitted, practical, or financially wise.
I'm absolutely convinced that it is permitted, practical, and financially wise in cases like yours, with a couple of qualifiers:
- The 110V outlet needs to be at least 36" off the garage floor (most are).
- It needs to be on a 20A circuit or on a 15A circuit with little if any other load.
Rat wrote:I have 220 in my garage now, so it probably wouldn't be all that expensive to put in the charger,
Don't be so sure of that. What you probably have is a 30A dryer circuit. The EVSE needs 40A, which means fatter wiring between it and the breaker panel. That's not too bad if the wiring is in conduit, but in older homes it is likely to be stapled to the studs inside the wall. And, of course, it has to be a dedicated circuit, so this assumes you do not have, and never intend to have, an electric dryer in the garage. Then there is the slight chance that an extra 10 A would overload your service coming into the house. Things could really get expensive then.
Rat wrote:and I have to believe that there would be times I need to charge faster than 18 hours.
Only if you intend to drive 80 or more miles in each of two consecutive periods with only one shorter charge time between them.