RatesUp to date · Jan 15, 2026
Time-of-Use (TOU) Rate
An electricity pricing structure where rates vary by time of day. Peak hours (usually 4-9 PM) have higher rates.
Why It Matters
TOU rates reward you for shifting energy use to cheaper off-peak hours. Pairing TOU with solar+battery means you can avoid the most expensive electricity entirely.
Real-World Example
In California, PG&E peak rates can exceed 50¢/kWh (4-9 PM) while off-peak dips below 30¢/kWh. Shifting a dryer load to off-peak saves ~20¢ per kWh.
Related Tools
Related Terms
Demand Charge
A utility charge based on your peak power usage (measured in kW) during a billing period, common for commercial customers.
Load Profile
A pattern of your electricity usage throughout the day and year. Important for sizing solar and battery systems.
Battery Storage
A system that stores excess solar energy for use when the sun isn't shining, providing backup power during outages.