Our experience was similar to 'PastorCharlie'. We had 300w of solar and we conserved water so we could last 2 weeks out in the boonies. We never had to run the generator except if cloudy or rainy for 2-3 days at a time - which was rare because we were mostly in the sunny west. By the time 2 weeks were up we were ready to move anyway.
A stovetop coffee perculator makes awesome coffee; butter your bread and plop it in a fry pan and it's delicious toast. Our heat was a propane catalytic heater - much more efficient than a furnace. We don't watch television.
Before solar we could last 3-4 days before having to run the generator.