Another SoCal Edison customer here, both my wife and I work from home (although the wife is expecting to start going back to her office soon). I'm on the tiered program (cheaper to charge mid-day or early morning/late night). I added solar to our roof just before we got the MY in anticipation of the cost increase due to charging. Before the car, I got a credit every month, except dead of "winter" months when my bill was still next to nothing. This summer, even with the solar, the bill is starting to creep up again. So much so that I use mainly free S/C miles to charge the car unless it just doesn't work logistically. I knew my system was a bit under sized (to cover the whole house + charge the car), so at some point I have to add a few more panels to break even. I think in our case, the increased costs center more around A/C use than anything else...that and my kids have yet to figure out how to turn OFF a light switch!