Go solar to save money, they said., page-38

no- it’s very efficient- you take the temperature down lower than normal comfort when there’s a power excess and no one in the house

Yes you set the timer up then leave for work on a good clear morning, cloud comes up and solar production is cut back to a third, so now you are importing two thirds more than usual electricity.

This happens across the board with solar, everyday is different so you just set all those things you said and still be economical with what is being put forward here from the retailer.