Wow, there are some very high electric rates in this thread. Xcel in Minnesota is about 8.5 cents/kwhr on the normal tarriff; you can switch to a Time of Use plan (3 cents at night, 30 during the day); or choose to pay $5/month for a separate EV meter wired only to your EVSE, with 3/30-cent night/day power just for the EV charging.
If your power costs 30 or 40 cents per kwhr, it seems like a no-brainer to get solar power (either rooftop or solar garden membership). Our solar array produces more than we consume for 9 months out of the year, so we only have to pay for electricity 3 months of the year. Even with our modest utility cost, our solar array is on-track to break-even within 10 years. I have heard that solar installations cost more in Cali, but I'm guessing not 300%-400% more?