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FLAT Rate Structure

Solar ROI for Dominion Energy South Carolina Customers

Dominion Energy South Carolina charges an average of $13.5¢/kWh. A 7 kW solar system produces a $11,066 NPV over 25 years.

$9,730
Net System Cost
$11,066
25-Year NPV
8 years
Payback Period
$0.112/kWh
Solar LCOE

Dominion Energy South Carolina Rate Structure

ParameterRate
Average residential rate$13.5¢/kWh
Rate structureFLAT
Export credit policy1:1 net metering for systems up to 20 kW

Solar System Economics

A 7 kW solar system for a Dominion 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 Dominion Energy South Carolina's $13.5¢/kWh average rate, the system saves $1,304 in year one, producing 9,660 kWh. The solar LCOE of $0.112/kWh is 17% below Dominion Energy South Carolina's current rate.

Battery Storage for Dominion Energy South Carolina Customers

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

Dominion 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 Dominion Energy South Carolina Customers

How much can Dominion Energy South Carolina customers save with solar?
A typical 7 kW solar system saves Dominion Energy South Carolina customers approximately $1,304/year in electricity costs. Over 25 years, the NPV of savings after system costs is $11,066.
What is Dominion Energy South Carolina's rate structure?
Dominion Energy South Carolina uses a flat rate structure at an average of $13.5¢/kWh. Without a large peak/off-peak spread, battery storage value comes primarily from backup power and net metering optimization.
Does Dominion Energy South Carolina offer net metering?
1:1 net metering for systems up to 20 kW
Should Dominion Energy South Carolina customers add battery storage?
Battery storage for Dominion 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

Duke Energy South Carolina
$13.2¢/kWh · FLAT
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