Gjac, those are good tips -- thanks! And to answer your question, we are "electrical minimalists," just like you are. It is hard to say how long our batteries could last -- since we always hook up to our 120 watt portable solar panel, we almost never have to run the generator -- less than once a year!
But my best guess is that under ordinary circumstances (warm weather for good battery performance), we could go for about four days before the battery reaches 12.1 volts.
Cold weather is different, because we have to run the furnace during shower time, which uses a lot of juice. That would limit us to three days without solar power or the generator.
