What is the benefit of a zero electricity system? Are you concerned about EMFs or do you want a tech stack that doesn't require spares you couldn't convieva ly produce yourself?
Discussion
I don't like dependency on a (near) global supply chain. Getting our energy from many hundreds or thousands of miles away centralizes power and is a recipe for a sort of slavery.
Energy, food, and necessary materials for sustaining life ought be able to be got locally or regionally so as to reduce the centralization of power.
I can appreciate that. Electric solutions do allow for a high level of commonality, however, which can simplify the whole system freeing up maintainance time for other endeavors.
The current ideal is solar/battery/inverter/heat-pump. That reduces maintenance nearly to keeping the panels clean and at my latitude it almost makes sense to mount vertically anyway. (Solar fence anyone)
The problem is that I can't produce my own new parts or even aquire them locally. Panels are pretty cheap though so stock-piling is an option.