I am looking forward to purchasing an S70D sometime over the next couple of months and have been going through the research phase of my big purchase
I live in an apartment complex and have a private garage with a 110V outlet. I was told by office staff that the outlet is not suitable for EV charging. I can imagine that the garages are on a shared circuit.
Given this constraint: what is the minimum charge current allowable from a 110V supply? I think it is a good idea to keep it plugged in to avoid self-discharge and possibly charge at 0-1mph. I have free charging at my office so it is not critical that I be able to charge.
Any thoughts?
5 amps at 110/120v. so in other words, about 600 watts. If you plug in at 0 rated miles remaining, it would take roughly 140-150 hours for a 100% charge at that rate, if the ambient tempetature stays above 32*F. Below 32*F, you mileage may vary, as once the pack temp drops below freezing, it will need to heat the pack to be able to actually charge. Then, it would basically, be drawing just enough power to keep the pack warm. The closer to 0*F, the less charging and more heating it will do. You could potentially go backwards in range. but you will have a warm pack. Given you have a private garage, this is unlikely. While the garage may initially be at or below freezing (I ave no idea where your located), the lack of Wind Chill, and the insulating effects of the car being in a relitively sealed room, and the heat in the pack from being used should allow it to stay at a reasonable charging temp.
What I would do, is see what amp breaker that your 110/120v circuit is on. If it is a 20 amp, given the power for a garage door opener, I'd say you'd be fine at 8-10 amps on a 15 amp circuit, and a solid 10 amps on a 20 amp circuit, maybe 12. Thats the best I can give ya without seeing the setup, and knowing if you have a dedicated breaker to your garage or if it is shared with multiple other garages. If it is a dedicated circuit to your specific garage, then you may be able to get away with more.
Heres a Idea, get yourself a Kill-A-Watt meter, and a space heater (or hair dryer should work too). Plug in the kill-a-watt meter, then turn the heater on low setting, a $15 heater from Wal-Mart has 2 heat settings that I saw, 700 watt and 1200 watt. This should be good enough for the test.
Record first the starting voltage of the outlet/circuit (The meter will show you!)
Next, turn the space heater on 700 watt. Note the voltage again after the heater has been running for about 10 minutes.
Finally, crank her up to max heat, and let it run for about 20-30 minutes (So if the line is heating up, it will reflect in the voltage due to the higher resistance) and then record the voltage once again.
Please report back here, I can give you a much better opinion on "safer" charge rate once I see what kind of voltage drop you get.
And if your feeling daring, while the heater is on max, close and open your garage door, noting the voltage on the line as the door is going up. Make sure you or someone else with you can activate the manual garage door lever if the breaker trips, or that you have a second way out of the garage if the breaker trips so you can reset it.
Please report back. Kill-A-Watt meters can be had for $20 at Menards, Home Depot and Lowes, space heaters around $15 just about anywyere. Get the dual voltage one though, better for testing.