Here is my x-y plot showing the comparison between my utility and Sense.
I actually just talked to my utility and they confirmed that the readings are done every hour. The number that shows next to 1:00pm is the amount used since the last reading at 12:00pm. If there is no reading at a given hour for communications reasons, then the amount would be cumulative for the previous two hours. For example if 12:00pm didn’t get read, then the 1:00pm reading would go back to 11:00am assuming that was the last good reading.
I’m not sure what you mean by a “small solar component”? I do know that at night when solar isn’t producing, I get a -21w value. During the day though, it is showing a positive number even if it is cloudy.