Dominion Energy's 2026 IRP: A Costly Mistake?

South Carolina families are already stretched thin by rising energy bills. Dominion Energy South Carolina's answer, apparently, is more of the same — more fracked gas, more coal, and more exposure to the fuel price volatility that's been burning ratepayers for years.

That's the core finding from Sierra Club's analysis of DESC's proposed 2026 Integrated Resource Plan (IRP), filed publicly in the docket this week. The critique is pointed and specific: Dominion's long-range energy blueprint doubles down on fossil fuel dependency at precisely the moment when cleaner, cheaper alternatives are becoming economically undeniable.

What Dominion's 2026 IRP Actually Proposes

An IRP is a utility's multi-decade roadmap — the document that tells regulators, investors, and the public how a company plans to keep the lights on and at what cost. These filings carry enormous weight. They shape infrastructure investment for 20 to 30 years, lock in fuel contracts, and ultimately determine what ratepayers are billed every month.

Dominion Energy South Carolina's 2026 IRP charts a course that leans heavily on fracked natural gas and retains existing coal generation — two resource categories that have proven financially unpredictable and environmentally costly.

This isn't a minor planning footnote. Fracked gas prices swung violently during the 2021-2022 energy crisis, with Henry Hub spot prices briefly exceeding $9/MMBtu — more than three times their historical average. Utilities that had hedged toward gas-heavy generation passed those costs directly to customers. Committing to additional gas infrastructure now means South Carolina ratepayers absorb that price risk for decades.

The continued reliance on coal compounds the problem. Coal plants are expensive to operate and maintain, increasingly uncompetitive against falling renewable costs, and face tightening federal emissions regulations that could force costly retrofits or early retirements — stranded assets that ratepayers typically end up funding.

What Sierra Club's Analysis Actually Says

Sierra Club's critique of the Dominion Energy 2026 IRP isn't environmental advocacy dressed up as energy analysis. It's a financial argument wearing green clothes — and that distinction matters.

The organization's core charge is that DESC is locking South Carolina into high-cost, high-volatility fuel sources while the economics of clean energy have shifted dramatically. Utility-scale solar costs have fallen roughly 90% over the past decade. Battery storage is following a similar trajectory. The argument that fossil fuels are necessary for grid reliability is increasingly hard to sustain when you can build a solar-plus-storage project that delivers firm, dispatchable power at costs competitive with new gas peakers.

Sierra Club's position is essentially that Dominion is making a billion-dollar-scale capital allocation decision that serves fuel suppliers more than ratepayers — and that South Carolina families will be paying the premium for years.

The environmental dimension is real, but the economic one is arguably sharper. When a utility builds a gas plant, it's not just building infrastructure — it's creating a multi-decade obligation to buy fuel at whatever price the market sets. Ratepayers don't share in the upside when gas prices fall; they absolutely share in the downside when they spike.

The Real Cost to South Carolina Families

Energy burden — the percentage of household income spent on energy costs — is already disproportionately high in South Carolina, particularly in rural communities and lower-income households. The state's median household income sits below the national average, which means energy price spikes hit harder here than in wealthier states.

Integrated resource planning decisions made in 2026 will still be affecting energy bills in 2045 and beyond. A gas plant permitted today has a typical operational life of 30-plus years. That's 30 years of fuel cost exposure, 30 years of maintenance expenses on aging infrastructure, and 30 years of potential regulatory risk as carbon pricing and emissions standards evolve.

Compare that to a solar or wind asset: once built, the "fuel" is free. Operating costs are low and predictable. The price risk that haunts fossil fuel generation simply doesn't exist. For South Carolina families already managing tight household budgets, the difference between a utility locked into volatile fuel contracts and one drawing from paid-off renewables could mean hundreds of dollars annually.

The counterargument — that renewables require expensive storage and backup capacity to be reliable — is valid but increasingly dated. The cost of battery storage has dropped more than 80% since 2013. Pairing solar with storage is no longer a premium option; in many markets, it's the economic baseline.

Regulatory Pressure and the Policy Backdrop

Dominion Energy South Carolina doesn't operate in a vacuum. The IRP process requires regulatory review, and the Sierra Club analysis is almost certainly a preview of arguments that will surface in formal proceedings before the South Carolina Public Service Commission.

South Carolina's regulatory environment has historically been accommodating to utility investment recovery — meaning the PSC has generally allowed utilities to pass infrastructure costs through to ratepayers. But that dynamic is under pressure as consumer advocacy groups become more sophisticated and as the economics of clean energy make it harder to justify fossil fuel investments on cost grounds alone.

The broader policy risk for Dominion is that federal clean energy incentives — including the Inflation Reduction Act's substantial tax credits for solar, storage, and clean energy manufacturing — make renewable alternatives more attractive to ratepayers, competing developers, and potentially to legislators watching their constituents' bills.

There's also a stranded asset concern that regulators can't ignore. If South Carolina commits to new gas infrastructure now and federal carbon regulations tighten in the 2030s — a realistic scenario under any number of policy trajectories — the state could be left holding expensive, underutilized assets while ratepayers fund the cleanup. It's a scenario that has already played out in states like Ohio and Michigan, where early coal retirements left billions in unrecovered costs.

What Happens Next

The 2026 IRP is a filing, not a final decision. The regulatory process that follows involves public comment periods, intervener testimony, and PSC review — all of which create opportunities for the Sierra Club's analysis and similar critiques to shape the outcome.

That process matters. IRP challenges have successfully altered utility planning documents in other states, pushing companies toward higher renewable commitments than they initially proposed. Georgia Power's recent IRP updates added substantial solar and storage capacity following regulatory pushback. Dominion Virginia has faced similar pressure. South Carolina's proceedings will test whether the state's regulatory framework is capable of the same course correction.

For developers, investors, and landowners watching this space, the IRP fight signals something important: the clean energy pipeline in South Carolina isn't just a function of market economics. It's being shaped in real time through regulatory contests like this one. A utility that's forced — or chooses — to pivot toward renewables at scale needs land, transmission access, and project development capacity that doesn't materialize overnight.

The trajectory of the Dominion Energy 2026 IRP debate will likely accelerate interest in solar land leases, battery storage siting, and distributed energy resources across the state, regardless of how DESC's plan ultimately shakes out. When regulators or public pressure push a utility toward renewables, the infrastructure build-out that follows creates significant opportunity for landowners and developers positioned ahead of the demand.

Dominion has a choice to make — and so does South Carolina's regulatory apparatus. The question isn't whether cleaner, cheaper energy is available. It demonstrably is. The question is whether the state's largest utility will recognize that before ratepayers are locked into another generation of costly fuel exposure.

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Internal Links Suggestions:

• [INTERNAL LINK: Sierra Club analysis]
• [INTERNAL LINK: Integrated Resource Plan]
• [INTERNAL LINK: clean energy incentives]