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FLAT Rate Structure

Solar ROI for Duke Energy South Carolina Customers

Duke Energy South Carolina charges an average of $13.2¢/kWh. A 7 kW solar system produces a $10,528 NPV over 25 years.

$9,730
Net System Cost
$10,528
25-Year NPV
8 years
Payback Period
$0.112/kWh
Solar LCOE

Duke Energy South Carolina Rate Structure

ParameterRate
Average residential rate$13.2¢/kWh
Rate structureFLAT
Export credit policy1:1 net metering at retail rate

Solar System Economics

A 7 kW solar system for a Duke Energy South Carolina customer costs $18,900 before incentives. The 30% federal ITC saves $5,670, and the South Carolina state credit adds $3,500. The net out-of-pocket cost is $9,730.

At Duke Energy South Carolina's $13.2¢/kWh average rate, the system saves $1,275 in year one, producing 9,660 kWh. The solar LCOE of $0.112/kWh is 15% below Duke Energy South Carolina's current rate.

Battery Storage for Duke Energy South Carolina Customers

$8,400
Battery Net Cost
$0
Daily Arbitrage
$0
Annual Arbitrage
-$11,382
25-Year Battery NPV

Duke Energy South Carolina uses a flat rate structure without significant peak/off-peak spread. Battery value comes primarily from backup power and net metering optimization rather than TOU arbitrage.

FAQ: Solar for Duke Energy South Carolina Customers

How much can Duke Energy South Carolina customers save with solar?
A typical 7 kW solar system saves Duke Energy South Carolina customers approximately $1,275/year in electricity costs. Over 25 years, the NPV of savings after system costs is $10,528.
What is Duke Energy South Carolina's rate structure?
Duke Energy South Carolina uses a flat rate structure at an average of $13.2¢/kWh. Without a large peak/off-peak spread, battery storage value comes primarily from backup power and net metering optimization.
Does Duke Energy South Carolina offer net metering?
1:1 net metering at retail rate
Should Duke Energy South Carolina customers add battery storage?
Battery storage for Duke Energy South Carolina customers has a 25-year NPV of -$11,382. 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 South Carolina

Dominion Energy South Carolina
$13.5¢/kWh · FLAT
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