My home is above the airport -at- 1100ft and you are correct the cloud do come in early. Like Ellen, I have a net meter PV system (24 panels, 5 yrs. ago) last 2 months 21.77 ea. Is your system leased? Driving up Ka'iminani above me I see systems placed on the east side, on the roof, not at all a good location at that elevation.
Next things that will help, a cloth line. Do you have more than 1 refrigerator freezer and is it getting old? Dust and clean the coils in the back every once in a while. Electric stoves baking or self cleaning use a lot of electricity.
The only thing in my house that doesn't use electricity is my Seth Thomas grandfather clock.