One of my British friends was kind of horrified at how we do things over here, especially in rural areas. The houses I grew up in only had electricity and phone lines (and eventually cable tv/internet) run to them. Individual wells and septic tanks/leach fields is very much the norm, even in planned developments. Lots of redundancy and you need to get your water tested occasionally to make sure the groundwater hasn't been contaminated by industry or neighbors (and basically no recourse if it has).

Once you get into adding rainwater collection for showers/toilets and switching to small scale solar, especially stuff like partial or whole house conversions to DC power to reduce conversion loss, things get complicated enough that a houseguest probably can't safely assume things work the way they expect. It's possible not every outlet is lit the usual way, or maybe they can only charge a device when the sun is out, or maybe you need to know the right valves to open to draw water from a cistern.

IRL building codes and consumer mindsets in first world countries have standardized a lot of things and offloaded/hidden a lot of the complexity that underpins our day to day existence. For many of us our power and water are handled by specialists in dedicated facilities, and the equipment which goes into our homes have strict codes and expectations to keep the experience of using them fairly standard.

But in a solarpunk world, especially one that's rebuilding, and relying on salvage and diy, I think we'd see many more retrofits and 'bespoke' solutions which are more efficient but leave the complexities of filtering water or generating electricity or disposing of sewage more exposed to regular people. I think there's some cool worldbuilding potential in that.