You and me both!
I just got my first one installed a couple weeks ago, and it is going to be so great come November, will simplify running loads and charging battery bank at the same time without pass-through. My strategy from late Oct to mid Jan is to add with charging "what-ever-the-solar-missed-today" That is: add with back up charging the difference between the average daily load minus solar that came in for the day.
Average daily is 40kWh, so if a Nov day is poor and I only get 20kWh of solar, then that night off-peak rate charge for 20kWh to make up the short fall. Then see what I get the next day.