Electrifying appliances in buildings will increase electricity usage, while reducing natural gas demand. However, if new electric equipment is energy efficient and “smart” it may not require significant additional need for electric generation. “Smart” equipment could shift electricity use from peak to off-peak hours—by pre-heating water tanks when demand is low or renewable energy is abundant, for example—helping use the existing grid resources more efficiently, and ultimately cutting overall system costs. Buildings that can use electric heat to store clean, renewable energy instead of burning gas on site would be assets on a renewable grid.3 Ongoing energy conservation and energy efficiency programs will reduce the amount of electricity needed on the grid as well.
 Decarbonization of Heating Energy Use in California Buildings Report.