I have heard of people in California who have similar rates and own battery based solar systems doing this where they sell their solar AND battery during the day and grid charge at night.
I doubt it will save you money because of the cost of the equipment. If you had other reasons to have the equipment such as poor grid reliability then it may be a good Idea. Of course it would be helping the utility meet the demand load if your an alturist. The utilities have looked at doing the same thing but the economics don't yet wash.
Victor