California Smart Devices Could Cut Peak Power Use by 8.75 GW

Imagine if your water heater, EV charger, and thermostat could save you money while cleaning up the grid at the same time.

That's the promise of a new study from Lawrence Berkeley National Laboratory. Researchers found that six types of price-responsive equipment could reduce California's peak electricity demand by up to 8.75 gigawatts by 2030, enough to power millions of homes.

Here's how it works. These smart devices shift electricity use to times when prices are low, like sunny afternoons when solar panels are cranking out power. Your EV charges when electricity is cheap and plentiful, not during expensive evening peaks.

California utilities will start offering dynamic pricing options to customers by 2027. Instead of paying one flat rate all day, customers pay less when electricity is abundant and slightly more during peak hours.

The economics make sense for homeowners. The study found that bill savings from price-responsive EV chargers and water heaters would far exceed the equipment costs under all pricing scenarios. Under full dynamic pricing, most equipment pays for itself in less than three years.

The state aims to reach 7 gigawatts of flexible electricity use through a mix of smart appliances and traditional demand response programs. That means less strain on the grid during hot summer evenings when air conditioners run full blast.

The Ripple Effect goes beyond individual savings. As more customers shift their energy use in response to price signals, the entire grid becomes friendlier to renewable energy. California currently has to curtail solar power during peak production because demand is too low. Dynamic pricing helps solve that waste.

Lower peak demand also means utilities need less costly infrastructure built just to handle those few dozen highest-use hours each year. Those savings eventually benefit all customers, not just those with smart equipment.

Battery storage requirements drop too. When appliances automatically use power during solar-rich hours, the grid needs fewer giant batteries to balance supply and demand.

California is already seeing progress. The state issued its first flexible demand standard for swimming pool controls in 2023. Manufacturers have since developed 73 models that meet the standard. Standards for electric water heaters and EV chargers are next in line.

Commercial customers stand to benefit significantly under full dynamic pricing, though some may need longer payback periods under milder pricing scenarios. Industrial facilities that have historically participated in demand response programs could see especially strong returns.

Smart appliances create a win across the board: lower bills for customers, cleaner energy for the grid, and less wasted solar power.