We're in the process of designing a house in a rural/mountain region and friends and family keep telling us to put in fireplaces/logburners in case the power goes out. But we don't like the idea of all of those particles in the house (plus the external pollution). However we're predicting that we'll have at least one 60kWh+ portable battery parked in the garage, plus solar panels (which aren't great in winter but still help) and possibly a battery like the Powerwall (another 14kWh+). So it feels like the days of worrying about losing electricity are coming to an end.