My solar array
is 8,280 watts (230 x 36 panels). You can see on its web page how much electricity I am generating and consuming, and how many miles I estimate I could drive on the surplus kWh produced.
I am NOT on a TOU schedule at present. In my area to qualify for that lower rate, you must pull 80% of your daily kWh from the grid between 8:00 PM at night and 1:00 PM the following afternoon. I think that, given the kWhs my array produces in the afternoon, we could qualify for that TOU schedule. However... the utility pays me for any surplus at the same rate that they charge me for what I pull from the grid. Therefore, if I went on TOU, and still produced a surplus, they would pay me LESS than what they are paying me now!
We'll see if that changes when I finally take delivery of my Leaf.