South Carolina backs Duke Energy grid plan as Helene costs trigger rate hike in 2026

Duke Energy Corporation’s utility customers in South Carolina will begin seeing revised electricity bills in early 2026 after state regulators approved new rate structures tied to Hurricane Helene cost recovery, ongoing grid resilience upgrades, and power generation modernization. The Public Service Commission of South Carolina (PSCSC) authorized separate increases for the company’s two regional arms—Duke Energy Carolinas (DEC) and Duke Energy Progress (DEP)—as part of a broader effort to improve reliability and manage the financial fallout of climate-related disruptions.

For DEC customers, the changes include a 3.2% storm recovery surcharge starting in January 2026, equivalent to a $4.58 monthly increase for residential users consuming 1,000 kilowatt-hours. DEP customers will see a larger bump of $11.20 per month starting February. The updates reflect a blend of customer bill relief measures—including securitization, tax credits, and shareholder-funded contributions—designed to offset the impact of multi-year infrastructure and storm recovery investments.

How is Duke Energy using securitization to lower Hurricane Helene recovery costs?

The most immediate cost driver stems from Duke Energy’s recovery efforts after Hurricane Helene, which caused significant infrastructure damage across its South Carolina footprint. To manage this financial shock without overwhelming ratepayers, the PSCSC approved a securitization plan that allows Duke Energy to issue long-term, low-interest bonds. This mechanism enables the company to shift recovery costs off its balance sheet while shielding customers from steeper hikes.

According to the company, the securitization strategy will save DEC customers more than $140 million in Helene-related charges over the full recovery window. This approach is markedly more cost-efficient than traditional cost recovery models, which would have translated into a roughly 20% higher financial burden for households.

Duke Energy credited the state legislature for providing legal pathways to implement this financing tool. The utility emphasized that securitization enables quicker capital deployment for urgent repairs while providing regulatory certainty and capital markets discipline.

What investments are being prioritized under Duke Energy’s South Carolina strategy?

Alongside storm recovery, Duke Energy is investing heavily in grid modernization and power generation upgrades, targeting both system reliability and operational efficiency. A major thrust of this investment is the rollout of self-healing grid technology, which automates power rerouting during outages to minimize downtime. Over the last two years, the number of South Carolina customers covered by these systems has nearly tripled. As of early 2026, more than 70% of customers are now served by self-healing infrastructure.

In parallel, Duke Energy is continuing to maintain and upgrade its generation fleet, with a particular focus on nuclear energy units. The utility said its nuclear plants are positioned to generate hundreds of millions of dollars in annual federal tax credits beginning in 2026—savings that will be directly passed through to customer bills under the PSCSC-approved framework.

These investments also serve the dual objective of supporting South Carolina’s economic expansion. Duke Energy’s infrastructure upgrades are calibrated not just for resilience, but also to accommodate load growth from new residential, industrial, and commercial demand.

What are the region-specific bill impacts and customer coverage under the new rate structure?

The rate adjustments will be phased across the company’s two utility subsidiaries. Duke Energy Progress customers—primarily located in the Pee Dee region and northeastern South Carolina (including Sumter, Florence, and Darlington counties)—will see the largest increase. Starting February 1, the average residential DEP bill will rise from $153.82 to $165.02 per month for 1,000 kWh usage.

In contrast, customers under Duke Energy Carolinas—who are concentrated in Upstate and north-central South Carolina, including Greenville, Anderson, and York counties—will see a more modest bump of $0.84 per month beginning March 1. This increase includes the Helene storm charge. DEC currently serves around 680,000 customers in the state, while DEP covers approximately 177,000.

Notably, Duke Energy is still pursuing a proposed merger of DEC and DEP operations in the Carolinas. If approved by regulators in 2026, the consolidation could save more than $1 billion in future costs across both customer bases, with additional operating efficiencies and procurement synergies potentially on the table.

How are residential energy efficiency programs factoring into bill management?

Beyond structural rate adjustments, Duke Energy is expanding its customer-facing programs aimed at reducing energy usage and household costs. These include targeted efficiency incentives, smart home integrations, and load-shaping technologies that help customers reduce peak consumption.

The company claims its energy efficiency initiatives across the Carolinas are delivering results that outperform the national average by more than 50%. In South Carolina, incentive levels for these programs were recently increased to broaden access and deepen household-level savings.

The emphasis on demand-side management reflects a broader industry shift toward decentralized grid participation and customer empowerment. Duke Energy’s framing is that giving users tools to manage their consumption not only reduces their bills but also flattens system-wide demand curves—helping delay or defer future capital investments.

What is the outlook for customer sentiment and regulatory posture in 2026?

Duke Energy is taking a transparent, stakeholder-aligned approach in communicating these changes—an important move given public scrutiny over utility rate increases. The company highlighted that the rate structure was built on a comprehensive agreement involving multiple stakeholder groups, including consumer advocates and regulators, which may help cushion public blowback.

That said, customer sentiment could diverge across regions, particularly if service reliability improvements are not felt uniformly. The long-term success of the rate plan may hinge not just on the absolute dollar amounts but on whether customers perceive tangible benefits—fewer outages, faster service restoration, and better cost visibility.

From a regulatory standpoint, the PSCSC’s willingness to approve securitization and enable nuclear tax credit pass-throughs signals an adaptive posture toward balancing affordability with infrastructure resilience. Future rate applications may similarly hinge on Duke Energy’s ability to demonstrate cost discipline, clear returns on investment, and alignment with policy priorities around storm hardening and clean energy transition.

Key takeaways: What this means for Duke Energy, customers, and the Southeast energy sector

• South Carolina regulators approved customer bill changes for Duke Energy Carolinas and Duke Energy Progress tied to storm recovery and grid investments.
• A 3.2% storm charge for DEC customers begins in January 2026, with DEP customers seeing a larger $11.20 monthly increase from February.
• Securitization of Hurricane Helene costs is expected to save DEC customers over $140 million compared to traditional recovery models.
• More than 70% of South Carolina customers now benefit from self-healing grid technology after accelerated deployment.
• Nuclear tax credits starting in 2026 will help mitigate infrastructure cost impacts through bill adjustments.
• A proposed merger of DEC and DEP could unlock $1 billion in future savings across Carolinas operations.
• Duke Energy’s energy efficiency programs are outperforming national averages and have recently expanded customer incentives.
• The regulatory posture in South Carolina suggests support for adaptive cost recovery mechanisms and infrastructure modernization.