Here are some obvious stuff<br><br>For solar and batteries if everyone connected their houses in parallel DC, we'd no longer need electrical companies, get no bills, everyone shares their capacity for when their neighbors need it and all is well.<br><br>Without sharing everyone has to design their home system for max power and consumption, this way only the average local instant max consumption need to be considered, everyone could even perhaps own one 250 W panel and one 200ah battery, connect each house and voila you got kilowatts and thousands of Amp hours of energy at your disposal.<br><br>one DC power line with two thick wires between each house, each panel and battery, and design the panels to always be under battery max V, and you wont need a charge regulator even.<br><br>2.<br>And if everyone had DC devices instead of AC, they could all plugin to this system directly, with minimal loss.<br>During day much of the used electricity will be from the panels.