Like all buildings should have some kind of standard for solar panel placement added or retrofitted with a very low cost modular mounted frame. Then, when you get an appliance it has a built in battery and comes paired with the right size panels that are sized for each region in the local store/wholesale distribution layer.

The whole scheme is hybrid in the first phase of a decade or so while edge cases and issues come up, like how to handle high rise buildings. Then the burden of grid infrastructure is less of a burden on the poor in total because few people are going to replace all appliances in this instance unlike those that can install a whole house solar system. The entire thing would be more incremental and serviceable over time with modularity. It is less efficient overall compared to a single controller and battery but doesn’t require large upfront cost or repurchase later down the line.