Keep in mind you’re in Seattle and how many days there are in a row with cloud cover. The watts that solar panels make are during peak season, aimed at the sun during solar hours without ANY shading (rigging) on one panel of the string. Realistically, you will still need a generator. To make it the most efficient, you could use it to charge a bank of batteries at the generator’s most efficient load and shut down for peace and quiet. It’s ridiculous to start a generator to make breakfast or brewing coffee. No engine is more efficient than a turbo diesel and it you can find an inverter type, even more so. For years I ran a Honda on deck to charge the inverter batteries. 5 gallons would give me a week of endless power and 85% silence. If you go that route, you can’t have too many carbon monoxide detectors onboard. As the wind changes eventually an alarm will sound so you close windows, reposition the generator or shut it down a while. Whatever generator you use, run it hard, in its best range and get it over with. Idle is a waste.