Add a batter to your house and radically change your relationship with energy, and save costs for everyone. Electricity on demand creates enormous inefficiencies in the energy infrastructure. Power plants are sized for peak loads, and if those peak loads are exceeded, people experience brownouts. Blackouts and power failures put millions of lives on pause. Equip each house with a battery, and the electric power grid only has to keep the battery charged, which can be done during off-peak operations. The power plants can operate more efficiently. Fewer power plants are required. Individual homes are much less likely to lose power in regional outages. Home batteries are a simple, ingenious, revolutionary, and profitable innovation. Coming soon, one approach by Tesla, an Elon Musk company.