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TOU Rate Structure

Solar ROI for Salt River Project (SRP) Customers

Salt River Project (SRP) charges an average of $12.8¢/kWh. Peak rates reach $21.8¢/kWh with off-peak at $6.8¢/kWh, creating strong battery arbitrage value. A 7 kW solar system produces a $14,044 NPV over 25 years.

$11,740
Net System Cost
$14,044
25-Year NPV
8 years
Payback Period
$0.101/kWh
Solar LCOE

Salt River Project (SRP) Rate Structure

ParameterRate
Average residential rate$12.8¢/kWh
Peak rate$21.8¢/kWh
Off-peak rate$6.8¢/kWh
Peak/off-peak spread$15.0¢/kWh
Rate structureTOU
Export credit policyAverage energy rate credit

Solar System Economics

A 7 kW solar system for a Salt River Project (SRP) customer costs $18,200 before incentives. The 30% federal ITC saves $5,460, and the Arizona state credit adds $1,000. The net out-of-pocket cost is $11,740.

At Salt River Project (SRP)'s $12.8¢/kWh average rate, the system saves $1,568 in year one, producing 12,250 kWh. The solar LCOE of $0.101/kWh is 21% below Salt River Project (SRP)'s current rate.

Battery Storage for Salt River Project (SRP) Customers

$8,400
Battery Net Cost
$1
Daily Arbitrage
$499
Annual Arbitrage
-$4,012
25-Year Battery NPV

Salt River Project (SRP)'s TOU spread generates $499/year in arbitrage value. The 25-year battery NPV of -$4,012 suggests batteries are marginal on economics alone. Backup power value and grid services programs may improve the case.

FAQ: Solar for Salt River Project (SRP) Customers

How much can Salt River Project (SRP) customers save with solar?
A typical 7 kW solar system saves Salt River Project (SRP) customers approximately $1,568/year in electricity costs. Over 25 years, the NPV of savings after system costs is $14,044.
What is Salt River Project (SRP)'s rate structure?
Salt River Project (SRP) uses a time-of-use (TOU) rate structure with peak rates of $21.8¢/kWh and off-peak rates of $6.8¢/kWh. The $15.0¢/kWh peak/off-peak spread creates significant value for battery storage — TOU arbitrage alone is worth $499/year.
Does Salt River Project (SRP) offer net metering?
Average energy rate credit
Should Salt River Project (SRP) customers add battery storage?
Battery storage for Salt River Project (SRP) customers has a 25-year NPV of -$4,012. The economics are marginal based on TOU savings alone, but backup power value and future grid services programs may change the equation.

Other Utilities in Arizona

Arizona Public Service (APS)
$13.2¢/kWh · TOU
›
Tucson Electric Power (TEP)
$12.8¢/kWh · TOU
›

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