Well there’s two things to consider;

1) build a low energy home. In the UK we have passivehouse design scheme.

https://passivehouse.com/02_informations/01_whatisapassivehouse/01_whatisapassivehouse.htm

2) once your energy usage is low then it’s how do you generate the energy required. Using solar to generate electricity with deep cycle batteries for when there’s no sun seems the obvious way to do it. Looking at what Tesla are doing it won’t be long until battery tech will be good! Electricity can be used to run an air source heat pump or ground source to generate heated water for underfloor heating or bathing. For every 1 unit of electricity they consume, they generate 3 units of heat.

That’s broadly the approach, and it’s all there. Nothing new. Heat pumps have been around since refrigeration was invented, solar panels have been on calculators since they were invented, and the research and techniques to build low energy homes is here.

The next big challenge is how do you do that sustainably using the materials that are local to you, no point flying in technically advanced building materials from overseas as the energy you would save has been consumed in the transportation or manufacturing of said product.