>Now that solar panels are trending down in price it seems IMHO the real disruption will be when batteries similarly become cheap enough that homeowners may disconnect completely from the grid or at least make solar the majority of their energy supply.
I think we're there now. You can get "server-rack" LiFePO4 batteries for about $1500 for a 5kWh battery. You can probably get solar, inverters, and 30kWh of batteries for about $25,000 and this should last maybe a few days for most homes. Mini-splits instead of central HVACs reduce power consumption a good bit, and have better energy efficiencies.
I think we're there now. You can get "server-rack" LiFePO4 batteries for about $1500 for a 5kWh battery. You can probably get solar, inverters, and 30kWh of batteries for about $25,000 and this should last maybe a few days for most homes. Mini-splits instead of central HVACs reduce power consumption a good bit, and have better energy efficiencies.