The cost of complete solar systems panels and batteries is offset by the capital value they add to the property, so unlike renting a power connection and burning capital as energy, it gives the home owner something to sell.
Maybe at some point in the future. Right now as someone who has close ties to realestate industry it doesn't only not add value to the property to be off the grid, but it actually counts as a negative. People don't care for fancy gadgets, they care for an easy to understand reliable connection that involves no maintenance. Off grid solar or actually anything off grid fails on all three of those points. Solar is about as much of an "asset" as a car, it costs a lot up front, devalues quickly as technology progresses, and no one really appreciates it's purchase and ongoing value.
The more this comes into practice the more rapid the shift to DC only appliances in the home this not only reducing the cost of those appliances but also the solar power system.
This is just flat out not going to happen. There's no standard for it. There's no driver for it: For small appliances there's zero benefit as the voltages will likely be wrong so they still need a powersupply, for large energy guzzlers DC is less efficient than AC, especially for devices that are 3ph. No houses are wired for it. Few devices are available for it. And unless you keep the voltages dangerously high (dangerous from the burning your house down due to a minor fault type dangerous) the cables losses are excruciating. Stick with AC.