Len wrote:
The first question is are you sure you need electricity? If so, what do you need it for? When? Off grid power use cannot be compared to grid powered houses. Off grid power? Lights, water, refrigeration? You have stated that batteries are not sustainable, so I presume you are not using power for unsustainable things... entertainment, communication, cooking, heating....
The next thing... where are you? Or, what are your resources? Do you have lots of sun? wind? a stream? heat? No matter your wishes, you have to work with what you have. If there is no stream, no hydro. If it always rains... no sun. So what do you have?
Once you have your resources figured out.... you know when you have batteryless power. Time to schedule power chores ... Take a freezer for example... -10 C is safe for food... but cooler will not hurt... so if using solar, for example, when the sun is shining run the freezer as cool as you can so it can be turned off when the sun does not shine. Pump water to a tank above the use while the sun shines so when it does not you still have water pressure. Wash clothes when the freezer is as cold as it gets and the tank is full. Make and use a root cellar... learn other ways to preserve food.
However, Great as daylight is.... there are times when you need lights whenthe sun is not shining the wind is not blowing and the water is not flowing.... you still need some kind of storage. You can minimise how much storage, but probably not eliminate it. The reality is that we (mankind) survived without power just fine for a long time... much longer than with. Just about every electrical device could be termed "unsustainable".
You need to define (as the Amish do) what you will allow and what you won't.