Fortunately (or unfortunately, depending on your perspective), I'm on VA Dominion Power, and have no TOU option that makes sense to me. Fortunately, Dominion is relatively cheap. After your first 800kWh/month it's $0.079/kWh from May-September, and $0.06/kWh October-April. Time of day is irrelevant. A full charge on 120V is ~ 7.5 kWh at the outlet according to my Killawatt meter. This is $0.45/charge or $0.0225/mile if you are getting 20 miles on a charge.
The down side is that Dominion offers a very limited and restricted net metering plan, so Solar is uneconomic in this state at a retail level despite the fact that production here would be 10-15% greater here than in MA and NJ, states with aggressive solar renewable portfolio standards.
If you are in a state that does not have a feed-in-tariff or SREC program (most don't), then solar will almost never pay off, even with the federal tax subsidy.