Reliability and Decarbonization: Can Markets Do Both?
Reliability and decarbonization sit at the top of your to-do list right now, whether you are in a control room, a commission hearing, a utility planning meeting, or on the customer side trying to manage risk. You do not get to pick one. You have to deliver both, often with the same constrained budgets, the same interconnection bottlenecks, and the same “how fast can this be built?” timelines.
From where we sit at the Alliance for Competitive Power (ACP), the tension is real, but it is not a dead end. Competitive wholesale markets can absolutely support a cleaner grid and dependable service. They just need rules that match today’s system and tomorrow’s resource mix. The alternative sliding back into utility monopoly buildouts and guaranteed returns might feel simpler in the moment. In practice, it often shifts risk to captive customers and mutes the price signals that keep costs honest.
Below, we walk through what is changing, where market design is lagging, and what reforms you can push for to build a reliable low carbon grid without giving up the benefits of competition. If you want the broader context on why ACP focuses on consumer protection through open markets, start with Alliance for Competitive Power.
Reliability and decarbonization: why this feels harder than it used to
Organized markets were built around a pretty straightforward rhythm: dispatch the lowest-cost units, keep reserves in the background, and lean on big fuel-based plants to cover uncertainty. That model worked when most of the fleet could respond on command and fuel was assumed to be there when you needed it.
Now you are integrating a lot more wind, solar, storage, flexible load, and hybrid projects. The energy is often cheap sometimes near zero marginal cost. But the system needs more than megawatt-hours. It needs the ability to ramp quickly, ride through disturbances, and show up for multi-day cold snaps or heat waves. When market prices fail to reflect those needs, you can end up with the worst of both worlds: clean energy growth that looks good on paper, and reliability stress that shows up at the exact wrong time.
That dual challenge is not just an ACP talking point. Argonne National Laboratory has been clear that market design has to evolve to support accelerating clean resources while maintaining reliability, including tools that were not central to early designs. You can dig into Argonne’s grid and market research through Argonne National Laboratory.
Can markets deliver reliability and decarbonization at the same time?
Yes, but only if you let markets do what they do best: attract investment by paying for real system value, and discipline costs by keeping entry open and procurement competitive.
When you hear “markets can’t do this,” it is often shorthand for a different problem: the products are incomplete, the planning is slow, or the revenue horizon is too short to finance new builds. Those are fixable issues. What you do not want is a fix that simply hands the problem back to a monopoly procurement model, where customers cover overruns and the competitive check on cost falls away.
Researchers and practitioners at Resources for the Future have highlighted the need for reform to enable an affordable, reliable, deeply decarbonized grid. That is consistent with what you see in stakeholder processes today: clean generation and storage need financeable revenue expectations, and the system still needs firm capability and reserves for tough hours. You can explore RFF’s work at Resources for the Future.
Market design decarbonization starts with paying for what you actually need
When your system leans more on renewables and flexible resources, you are not just swapping out one generator for another. You are replacing a bundle of services that used to come along for the ride. With the old thermal fleet, you often got inertia, controllability, and fuel availability without having to name them explicitly in market products.
In a cleaner grid, you have to make those needs visible. That is what people mean by market design decarbonization. It is a fancy label for a practical point: if the market does not pay for it, you should not be surprised when it does not get built.
Energy Innovation has called for wholesale market approaches that support rapid decarbonization while reliably integrating clean resources at least cost. Their work is useful if you are looking for a readable bridge between engineering realities and market mechanisms. See Energy Innovation.
In day-to-day terms, you should expect markets to more clearly value:
Firm capacity that is available during peak conditions and extreme events
Flexibility, including ramping capability and fast response to forecast error
Operating reserves with performance requirements that reflect real scarcity
Deliverability, meaning the transmission capability to move power to where it is needed
Demand-side capability, including demand response and managed load that performs when called
Reliability and decarbonization in capacity markets: stop treating every MW the same
Capacity markets and resource adequacy rules were designed to answer a simple question: will enough supply be there when customers need it? With high renewable penetration, the question stays the same, but the math changes. The value of a resource depends on when it performs, how long it can perform, and whether it can deliver through transmission constraints.
A 2024 study in IET Renewable Power Generation makes a point you have probably felt in stakeholder meetings: as thermal plants retire and uncertainty rises, capacity constructs need to evolve to reward flexibility and clean firm capability, not just nameplate megawatts. The journal’s home is a good starting point if you want to trace the literature. See IET Renewable Power Generation.
On the ground, you get better outcomes when you:
Use data-driven methods like effective load carrying capability (ELCC) to accredit wind and solar based on real contribution
Credit storage and hybrids based on duration and seasonal performance, not just short bursts
Align penalties and bonuses with the events that actually drive customer harm
System Reliability & Market Signals
Seasonal adequacy
What you are trying to avoid: Multi-day low wind or low solar periods, especially in winter peaks or late summer heat
Market signal to strengthen: Seasonal capacity products or accreditation that reflects duration risk
Flexibility
What you are trying to avoid: Ramping shortfalls and reserve scarcity as net load swings faster
Market signal to strengthen: Better ramping and reserve products with scarcity pricing that actually clears
Deliverability
What you are trying to avoid: Clean energy trapped behind congestion, raising costs and increasing reliability risk
Market signal to strengthen: Transmission planning and congestion signals that bring new lines and upgrades online
Performance during stress
What you are trying to avoid: Forced outages and non-performance in the hours that matter most
Market signal to strengthen: Performance-based obligations and penalties tied to real event risk
Reliability and decarbonization get easier when you include clean firm options
One of the most useful shifts in this debate is the growing focus on “clean firm” electricity. That phrase is not about picking winners. It is about admitting an operational reality: you need resources that can run when the weather is not cooperating and the system is under stress.
Clean Air Task Force describes clean firm resources as zero-carbon and dispatchable on demand, including options like nuclear, geothermal, and certain hydrogen-enabled generation. Their review of many modeling studies points to an important takeaway for you as a planner or market designer: clean firm can reduce the cost of meeting seasonal and extreme weather reliability needs in deeply decarbonized systems. Read more at Clean Air Task Force.
Here is the catch: a lot of clean firm and long-duration flexibility options are capital intensive, and they rely on long-run revenue certainty. If your market rules underpay their reliability value, you will not get enough of them. If you fix that mismatch, reliability and decarbonization stop competing and start reinforcing each other.
Where market design still falls short for reliability and decarbonization
Most stakeholders we talk to are not calling for markets to be scrapped. They are calling for markets to catch up. Work indexed through IDEAS/RePEc, including research tied to the World Bank community, reflects a similar theme: spot markets have held up, but decarbonization pressures expose design questions that can’t be ignored. You can browse that research ecosystem at IDEAS/RePEc.
In workshops and dockets, the gaps usually show up in the same places:
Short revenue horizons that make financing new clean firm, storage, and transmission harder than it should be
Accreditation that lags reality for variable, hybrid, and demand-side resources
Transmission underbuild that turns cheap clean energy into expensive congestion
Reliability services that are underpriced, especially reserves, ramping, and performance risk during scarcity
You can solve these without handing the keys back to monopoly procurement. In fact, if the “solution” is simply more utility-owned generation with guaranteed returns, you often end up crowding out independent developers and transferring risk straight to customers.
Market design decarbonization reforms you can support without monopoly backsliding
If your goal is a reliable low carbon grid, you are usually looking for a package of changes, not one silver bullet. The specifics will differ by region, but the direction is consistent: strengthen performance, extend investable signals, and keep procurement competitive.
Longer-term, competitive procurement that complements energy and capacity markets
Think technology-neutral but emissions-aware solicitations, clean capacity auctions, and competitively awarded contracts that provide bankable revenue without defaulting to utility ownership.
Better accreditation and clearer performance incentives
Align obligations with the hours and seasons that drive risk. Credit storage and demand response based on duration and deliverability, and make non-performance costly when it matters.
Transmission planning built for competition
Proactive interregional planning expands the footprint for low-cost clean resources to compete to serve load, instead of getting stuck behind seams and congestion.
Modern ancillary services and scarcity pricing
Products for fast frequency response, ramping, and reserves should reflect real operational value, not administrative shortcuts.
Make demand-side participation normal, not exotic
Remove barriers for customers and aggregators to provide capacity and flexibility, and hold them to performance expectations like everyone else.
If you want evidence on how competitive market regions compare with monopoly models over time, ACP summarizes findings and consumer impacts on our FTI Studies page.
And if you are seeing renewed pressure in your state to expand utility monopolies under the banner of “certainty,” our explainer on why states push utility monopolies and why it hurts you connects those incentives directly to customer impacts. For a companion piece on how open markets deliver savings and resilience, see how open markets deliver savings.
FAQ: reliability and decarbonization in competitive power markets
Can power markets support clean energy without subsidies?
They can, if you price reliability attributes correctly and if longer-term revenue is awarded through competitive processes. Policy can still shape goals, but you can preserve open entry and avoid locking customers into utility-owned assets as the default.
Do capacity markets solve reliability and decarbonization by themselves?
No. Capacity constructs help with adequacy, but you still need transmission that can deliver, accreditation that reflects real performance, and ancillary services that manage variability and scarcity.
What is the biggest market design decarbonization gap right now?
In many regions, it is the mismatch between what the grid needs (such as clean firm capability and flexibility) and what the market reliably pays for over a long enough horizon to finance it.
Does building a reliable low-carbon grid require abandoning competition?
No. Competition is one of the best tools available to keep costs in check and spur innovation, as long as you resist monopoly expansions that shift risk onto customers.
Conclusion: you can get reliability and decarbonization, but you have to tune the rules
Reliability and decarbonization are achievable together, but they are not automatic. If you want markets to deliver, you have to make sure the market pays for the attributes that matter in a cleaner system: firm capability, flexibility, deliverability, and performance under stress.
That is the through-line in ACP’s work: keep procurement competitive, keep price signals transparent, and modernize market products so investors build what the system truly needs. If you are working through resource adequacy, transmission planning, or market rule changes in your region, connect with us at ACP Contact. We are always ready to compare notes and help you keep the next era of grid investment both cleaner and more dependable.
