I have it as well, and I'll just comment that the other commenter is right in that BGE is able to separate out car charging from non-charging, which was at the same right everyone else gets.

So the whole system needs to know how much energy was used to charge your car. So they need either a smart meter, or your car can tell them. So if you own a Tesla (or any vehicle on this list I'd imagine), they just use that.

So I now tell my car to start charging at 8:00 p.m., and I save a few dollars on every bill. Weekends are also at the low rate. It's not a huge money saver, though.