Most rooftops generate more power than the household consumes. The vast amount of air-conditioning for apartments is likely already accounted for by rooftop generation. An easy way to gridscale that is to have batteries closer to the rooftops that re-distribute that rooftop power when the sun goes down. Incentives can be given so that home owners over-provision their solar with bigger arrays and inverters, and to turn their home batteries into VPPs.