This solar roof is for single family homes, not city scale energy. You can power a single family home by building extra solar capacity so you have a surplus of

This solar roof is for single family homes, not city scale energy. You can power a single family home by building extra solar capacity so you have a surplus of energy during the day to charge batteries which you use at night. Just search for "off grid homes" to see examples. It'll most likely be more expensive at todays prices but the technology absolutely exists.