Vermont is considering installing Tesla Powerwalls for every home in the state to create distributed storage of power which they can then control to optimize th

Vermont is considering installing Tesla Powerwalls for every home in the state to create distributed storage of power which they can then control to optimize the grid. Theoretically those Powerwalls could be fed with DC instead of AC and use their inverters to power each home with no need for grid synchronization. Each home would have its own AC frequency. One issue might be devices which use the grid frequency to run clocks. If the frequency in each home is different or drifts then clocks across the state might not tell the same time or get out of sync. I'm not sure how common grid synced clocks are any more, most clocks these days use a quartz crystal as a time reference instead of the grid. Industry will have to remain on the AC grid and they probably do use grid frequency for a variety of things, but there aren't inverters and batteries big enough to power the largest industries anyway. So perhaps a hybrid grid will develop, legacy AC for industry and DC for homes to remove one stage of conversion inefficiencies (both to the home and in feeding power back to the grid from the batteries). Seems like it would be easy to test this on a small scale to start with on a small group of homes.