Client in Mesa is on Salt River Project's Schedule E-32 time-of-use rate. The tariff shows different TOU periods for summer vs winter, plus weekend rates. I'm getting lost trying to figure out when peak hours actually apply. Anyone have experience with SRP's TOU structure?
SRP Arizona - Schedule E-32 TOU periods confusing
Christie - SRP's TOU is complex but here's the breakdown: Summer peak is 3-8pm weekdays (May-Oct), Winter peak is 6-9am and 6-9pm weekdays (Nov-Apr). Weekends are always off-peak. They also have a "super-peak" period 3-6pm in summer.
The super-peak rate is brutal - often 2-3 times the off-peak rate. If your client has any flexibility in their operations, shifting load away from those 3-6pm summer hours can save thousands.
Thanks! Found the rate table on page 142 of their tariff book. Super-peak is $0.28/kWh vs $0.09/kWh off-peak. Client runs chillers during those hours but we might be able to pre-cool the building.
Pre-cooling strategies work great in Arizona. We've helped several clients reduce summer bills by 20-30% just by shifting AC loads to off-peak hours. The thermal mass of most buildings can carry them through the peak period.