TEConnor said:
A hypothetical about the Pepco PIV pilot:
We are a net-meter (solar) house and were contacted by Pepco about joining their PIV charging pilot. I think they might have gotten our contact info from the State via the charger rebate app, but I didn't ask. The point of my post is to inquire if anyone else has done the PIV pilot with solar/net-metering. At present we're not driving much (have averaged about ~ 500 miles per month and just less than 100 kWh per month w/ some public charging). We are also projecting to break even on Generation vs Consumption this year. Since Pepco doesn't refund us anything if we generate more from solar than we consume, our original thought on EVs, in addition to the obvious fun of the eGolf, was that it would be a nice way to get the most from the net metering cap. It seems to me that IF we agree to install the second meter separate from our Net meter that we would and could only 'purchase' that power (at a reduced rate) and not benefit there from solar. We'd be paying to install the meter and then paying for the privilege of paying to charge the car, as opposed to using our excess solar under the cap. If you can get through my convoluted logic, is there something I'm missing about this charging pilot program?
Cheers,
Tim
You are right to be skeptical of the benefit in your situation. When I built my house two years ago, I did not put in two meters because my utility did not have any Net Meter Aggregation in place at that time. If I had separated the car charging from the house, I would not be able to offset the car charging with solar. So, you need to ask the utility specifically about your situation.
I did a usage and rate analysis for a user on another forum and found that the PG&E EV Sub-Metering pilot would save him a significant amount of money. The reason is that he has a relatively small solar system and two EVs. The EV usage pushed him into expensive usage tiers (the more you use, the higher the per kWh price). So, by joining the sub-metering pilot, he would have the EV usage subtracted from his main meter and his household electric bill would go to zero. He would also be able to do unlimited overnight EV charging for about 11c/kWh, but it still probably won't be offset by the solar. In his situation, that was OK because it was still cheaper than putting the whole house on the EV rate plan.