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January 23, 2026

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Drought Magnifies and Complicates Climate Change’s Impact on the Grid

Dej Knuckey

Less than five years ago, California’s Lake Oroville was so empty its 644-MW Edward Hyatt Power Plant, a pumped-storage hydroelectric plant, was shut off for the first time since it came online in 1967. The state was in a drought so long and severe that many areas had water restrictions, most reservoirs were at or near record lows, nearly 400,000 acres of farmland were idled, and close to $1 billion worth of crops were lost.

Almond trees in general, and the billionaire couple who own Wonderful Foods specifically, found themselves on the public enemies list again after a 2016 Mother Jones expose uncovered their substantial water use. But neither almonds nor pomegranate juice — nor even billionaires — were mostly to blame. La Niña bore the brunt of the blame for the drought that gripped the West, and climate change exacerbated it.

The hydropower shutoff was just one of the energy-related impacts of the drought. Throughout this extreme dry spell, the water-energy nexus was laid bare.

Today, we need to think of drought as more than an agricultural or wildfire-risk problem; it’s a systemic threat to the electric grid. Drought, like other weather extremes, undermines supply, drives up costs and exposes weaknesses in our infrastructure planning.

When it Rains, it Pours (And When it Doesn’t…)

The irony of researching this article the same month California was declared drought-free for the first time in 25 years is not lost on me. When I returned to Northern California from my holiday break, it was raining. Hard. With the 101 freeway closed in both directions thanks to the storm coinciding with a king tide, my last piece on sea level rise seemed relevant. But drought? It was far from top of mind.

Compared to other climate extremes covered in this series, I assumed drought’s impact on the grid would be both obvious and tangential. More drought means less hydropower generated. Hardly a story. But digging deeper, it’s clear that drought should be thought of as a problem multiplier when it comes to our energy system.

As climate change progresses, we have to build a grid that can handle heat waves, wildfires and extreme drought, as well as extreme precipitation and sea level rise. It’s a complex challenge that will get more urgent as climate swings become more extreme.

The Tangled Water-energy Nexus

The intersection of water and energy is, to put it mildly, complex.

Water is used to produce energy directly (hydropower), is heated to produce steam to produce energy (thermoelectric plants with steam turbines), cools that steam as it leaves the turbine and is pumped underground to capture geothermal energy. Water also acts as a battery in pumped-storage hydroelectric plants, which pump it up during off-peak hours for later release.

As renewables have produced a larger portion of the electricity supply, the dependence on water-cooled thermoelectric plants has declined. | EIA

Water also consumes energy when it’s pumped up from aquifers, conveyed from one location to another, treated so it’s potable and heated for those long showers we love. In California, those uses consume at least 12% (possibly as much as 19%) of all electricity on the grid. Nationally, it’s lower, with 4% of total electricity generated used for drinking and wastewater services.

Drought affects the physical grid, too. When aquifers are pumped out, the ground above can subside as the pockets of ground that had held water collapse. In California’s San Joaquin Valley, decades of drought-driven aquifer pumping have caused land to sink by a foot a year, damaging roads, pipelines and overhead utility infrastructure.

Then there are the less obvious intersections. Water conveys inputs for the energy system, such as coal barges on the Mississippi: 11% of all coal used by power plants is delivered by barge, and under this administration, coal-fired plants are being revived. And the correlation between rising electricity demand and water demand is high in the booming data center sector, creating stress on both systems.

Drought as a Problem Multiplier

With water woven so tightly into the energy system, drought becomes an electricity problem too.

The most obvious impact of drought is a decline in hydroelectric output. Conventional hydroelectric plants in the U.S. contribute about 6% (240,000 GWh) of total U.S. utility-scale electricity generation. Pumped-storage hydro adds 23 GW of storage capacity.

For hydro asset owners, drought has a real cost: A 2024 study found the sector lost 300 GWh of production and $28 billion of revenue over the 2003-2020 period. The period following the study saw droughts worsen. In the 2022-23 water year, Western U.S. hydropower output was the lowest since 2001.

Drought also has cross-border trade implications. The U.S. typically imports electricity from Canada, where hydroelectric plants generate more than 60% of the electricity. In September 2023, drought in Canada reversed that flow, making Canada a net importer for five of the following nine months. While Canadian imports account for less than 1% of U.S. electricity, the exchange plays an important role in grid balancing.

The Drought-demand Spiral

Drought increases energy demand. In the agricultural sector, there’s more energy used to pump water from the aquifer to water crops. Despite a water shortage, some end users, such as golf courses, will increase their water use, meaning more water is treated and pumped before it reaches the green. Droughts often coincide with hotter weather, when the demand for air conditioning rises.

Drought impacts U.S. and Canada’s energy trade. Normally, Canada is a net exporter due to its strong hydro sector, but a drought changed the direction of the electric flow as Canada’s generation fell. | EIA

Droughts also increase the risk of wildfires, with bone-dry vegetation more vulnerable to any spark from the grid. And even if the grid’s not the cause of the fire, fighting those fires draws on water supply. The devastating Palisades fires a year ago were exacerbated when electric utilities de-energized lines, leaving water utilities unable to pump enough water to keep the fire hydrants at full pressure. Even without the outage, the unprecedented demand on the hydrant system would have been almost impossible to meet, exposing the need to provide battery backup to critical infrastructure, including water pumps.

Water as a Power Plant Input

It’s a misnomer to say energy is one of the largest users of water in the same way that it’s a misnomer to say wind farms take up massive amounts of farmland. Water used in energy production largely continues its sea-bound journey after use, though warmer than before, in the same way farmlands continue being productive as cattle graze under the wind towers.

Power plants that use energy to cool steam are impacted by drought only when there’s not enough water to intake. Thermoelectric power plants, including coal, natural gas, nuclear, oil and biomass, are becoming both a smaller part of the nation’s electricity supply and more water-efficient. Wind and solar generators have grown from 4% of total utility-scale generating capacity in 2010 to 18% by 2021, so the portion of our power system dependent on water has fallen.

Still, thermoelectric power plants, almost all of which depend on water, provide about three-quarters of the electricity on the grid. They cool the steam from their turbines in one of three ways: once-through, where water is taken from rivers, lakes and aquifers and released back hotter; closed-loop or wet-recirculating, which reuses the water once it’s literally let off some steam in cooling towers; or dry-cooling, which uses air to cool the steam.

Most of the water withdrawn by once-through systems is discharged back into the place it came, not contributing to the drought; however, they can be impacted by drought if the river or dam they draw from is depleted, or is too low to permit the volume of warmed water to re-enter the natural water system. In 2022, the Jim Bridger coal-fired power plant in Wyoming was at risk of being shut off as the Green River it draws from ran low.

Closed-loop thermoelectric plants are less affected by drought but draw more water from the system to replenish the amount that evaporates. Dry-cooling plants, which are relatively rare, use the least water, but at the cost of power plant efficiency.

The EIA reports that thermoelectric plants are becoming more efficient in their water use. “The sector’s water-withdrawal intensity — the amount of water withdrawn per unit of electricity generated — continued to fall, declining 2.1% from 11,849 gallons/MWh in 2020 to 11,595 gal/MWh in 2021.” Pushing against that trend, the rise in data center energy demand may increase the power sector’s total water demand even if the gallons/MWh declines.

Moving Toward a Lower-water Grid

Of course, the easiest way to reduce the grid’s reliance on water is to adopt generation technologies that require little or no water. Solar and wind are obvious candidates, but some types of geothermal and combined heat and power (CHP) need little to no water.

Geothermal technologies’ water needs vary, with binary cycle power plants’ closed loop systems not requiring any aside from water used in the initial drilling process. Some of those that use water, such as Fervo Energy, can use degraded or brackish water that could not be used for agricultural or other purposes.

CHP systems create efficiencies by capturing the energy from the power plant’s steam to provide heating, hot water or chilled water for facilities. They are highly water-efficient, though they’re generally limited to smaller power plants co-located with facilities or areas with district heating.

Policy that Prepares for Drought

Regulators, operators and asset owners need to prepare for a drier (and hotter, and wetter, and stormier) future. And that begins with assessing risk.

The West well understands the impact of droughts after the past few years of real-life experience. In other areas, even those that haven’t had droughts in the past, modeling potential droughts’ impact on reliability and reserve margins is important if the industry is to prepare for the future.

One example: a study of the PJM and SERC region’s generation capacity found that if the area suffered a drought equal to “the 2007 Southeastern summer drought … the usable capacity of all at-risk power plants may experience a substantial decrease compared to a typical summer, falling within the range of 71 to 81%.”

The energy-water nexus must be considered in energy policy and pricing: low electricity tariffs have made it affordable for farmers to pump scarce groundwater from aquifers that do not recharge as quickly as they are being drawn down, especially during periods of drought. And there’s untapped potential, pun intended, for incentivizing farmers to pump irrigation and well water at off-peak times or connect automated irrigation pumps to demand-response programs.

The question is whether utilities have any incentive to support policies that will cut the energy used by the water system. Until policies reward water-efficient moves by the energy industry, moving all of that water will continue to consume much of the electricity we produce, and keep the industry vulnerable to droughts.

Different Problem; Similar Solution

As with floods, fires and other extreme events exacerbated by climate change, preparing for drought requires building a more flexible and resilient grid. Islandable microgrids, more energy storage, stronger infrastructure and diversified generation sources all help stabilize the grid, whether facing a long-duration challenge like a drought or an immediate emergency like a flood.

Extreme weather events require thinking, and collaborating, outside the electric box: no single industry can prepare alone and the sooner that states and regions put together integrated plans for these climate extremes that include all of the energy system players along with those in charge of water, transportation and every other piece of critical infrastructure, the better able we’ll be to cope with the next extreme weather event.

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ACP: Slow Renewable Development in PJM Could Cost Ratepayers $360B

A report from the American Clean Power Association (ACP) argues that slowing down renewable development in PJM could cost ratepayers $360 billion over the next decade.

The analysis, released Jan. 21, compared a base case assuming wind, solar and storage development follows current expectations and reaches 137 GW of nameplate capacity by 2035 with a scenario in which only projects already under construction or legally mandated are built. With the amount of growth expected in PJM’s 2025 Load Forecast, the report finds that without that renewable buildout, the RTO will increasingly rely on aging fossil fuel resources and imports, dispatching of which would increase by 20% and 292%, respectively.

West Virginia would see the largest residential rate increase over the next decade at $8,500 for a typical customer, followed by Ohio and Pennsylvania at $6,500 and $6,400. Illinois and D.C. would be lowest at $3,200 and $2,900.

“These findings make clear that delaying clean energy deployment comes at a steep cost,” Senior Vice President of Markets and Policy Analysis John Hensley said in a statement. “Timely investment in wind, solar and energy storage is essential to maintaining reliability, reducing dependence on imports, and protecting families and businesses from sharply higher electricity bills as demand continues to grow.”

Hensley told RTO Insider the impact of a slowdown in renewable development would come in three areas: rising rates, diminished reliability, and the economic impact of data centers and manufacturing facilities siting outside of PJM as a result.

While 50 GW of new gas generation are included in the analysis, the report says that efforts to push for more resources would quickly lead to higher costs so long as turbine availability remains constrained.

“This reliance on imports and gas peaking units increases exposure to fuel price volatility, drives more high-priced hours, and heightens reliability risks during peak demand periods,” the report says.

Hensley told RTO Insider he views gas as playing a role in meeting the reliability challenges posed by rapid load growth in the coming years, but there is a timing disconnect with how long those resources take to construct. Renewables have strong supply chains allowing for rapid construction.

He said the starting point for efforts to bring more generation online should be a non-discriminatory approach that recognizes the contributions of all technologies. He pointed to PJM’s effective load-carrying capability model for determining the capacity contribution for different resource classes.

The No Clean Power scenario assumes states end their renewable portfolio standards and no renewable energy credits are available, while the base case includes tax credits being available in full for wind and solar through 2030 and for storage through 2032. Hensley said the base case assumptions about renewable development were based on projects in PJM’s interconnection queue, an ACP database of renewable projects, Energy Information Administration data and projections from organizations such as Bloomberg and S&P Global.

PJM’s 2026 Load Forecast tamped down the expected growth over the next five years, though peaks are still expected to increase from 160 GW in 2027 to 191 GW by 2031. By 2046 the summer peak is expected to reach 253 GW. (See Pessimistic PJM Slightly Decreases Load Forecast.)

The RTO’s two transition cycle queues include 1,669 MW of wind, 7,051 MW of storage, 17,075 MW of solar, 1,503 MW of nuclear and 5,460 MW of gas, according to its planning webpage. There are 27,537 MW of solar under construction, as well as 3,876 MW of storage, 8,059 MW of wind, 5,796 MW of gas and 2,930 MW of hybrid resources.

PJM did not respond to a request for comment.

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ERCOT Finds Stakeholder Support for Batch Process for Large Loads

AUSTIN, Texas — ERCOT says there is “broad agreement” from stakeholders that the grid operator’s batch-based approach for interconnecting large loads is necessary.

Jeff Billo, ERCOT vice president of interconnection and grid analysis, told the Texas Public Utility Commission during its Jan. 15 open meeting that it has only begun to engage stakeholders on the batch process, but a couple of themes have already stood out (59142).

“Everyone that we have talked to so far has been supportive of us moving to a batch study process and moving away from the current process,” Billo told commissioners. “I think one of the reasons is … that there is a lot of uncertainty in the current process. We have this issue today where loads go through the study process, and then something happens — maybe another load in their neighborhood moves forward and meets their financial commitment obligations and that load is not included in the other project study … and we’re kind of caught in this restudy loop for a lot of these projects.”

Other themes outlined by Billo included: uncertainty in the current process creating risk for developers of existing interconnection requests; transparency and consistency in the batch process; and aligning the process with ERCOT’s transmission-planning work.

ERCOT CEO Pablo Vegas unveiled the draft process in December, calling the wave of large loads looking to interconnect “fairly unprecedented.” The gird operator had 63 GW of interconnection requests from large loads at the end of 2024. That number has mushroomed to 232 GW as of January, according to staff’s latest data. (See ERCOT Again Revising Large Load Interconnection Process.)

With the batch process, ERCOT will group together large-load requests to be evaluated, rather than rely on the current individual studies that transmission service providers conduct. The batch studies will determine the amount of requested load that can be reliably served each year over a six-year period and the transmission upgrades needed to accommodate the full load requested.

The grid operator says a “Batch Zero Study” will likely be needed to transition from the current process, which was just documented in December by a rule change to the Planning Guide. That study will set a foundation and baseline for future studies, which could happen several times a year for several years.

Billo said the first batch study will break the cycle of restudies and “get those projects out” without creating a restudy loop or uncertainty. The first batch will take projects that are already under ERCOT review, currently totaling about 7.4 GW.

“We are still really early in the process of designing how that batch study would work, but we hope to bring more details on that in the coming weeks,” he said.

ERCOT staff plan to use its Large Load Working Group as an engagement forum with stakeholders, as well as updating the Technical Advisory Committee and PUC during their next regularly scheduled meetings. During a Jan. 21 discussion with TAC, Billo deferred most questions to a Feb. 3 workshop on the batch process.

“We’re going to get through everything that we need to get through that day,” Billo promised TAC members. “We will lay out as many details on that framework as we can … [understanding] that the framework will be in pencil. We want the stakeholder feedback.”

A second batch-process workshop is tentatively scheduled for Feb. 12.

“And then our homework is due to the commission,” Billo said, pointing to the PUC’s Feb. 20 open meeting.

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Colo. PUC Sticks with Approval of Markets+ for PSCo

Colorado regulators have declined to reconsider their decision finding that it would be in the public interest for Public Service Company of Colorado (PSCo) to join SPP’s Markets+.

The Colorado Public Utilities Commission voted 2-1 on Jan. 21 to deny requests by three organizations for rehearing, re-argument or reconsideration. As in the initial decision, issued Oct. 9, Chair Eric Blank and Commissioner Tom Plant voted in favor, while Commissioner Megan Gilman was opposed. (See Split Colo. PUC Approves Xcel Energy’s Markets+ Application and Colo. PUC Approves PSCo’s Markets+ Participation.)

The requests for reconsideration came from Western Resource Advocates, Advanced Energy United and Colorado Energy Consumers.

“After reviewing the [requests] filed by WRA, AEU and CEC, I still find that the majority’s initial decision is sufficiently supported within the record and based on policy considerations,” Blank said.

But the commission did agree to reverse its decision to direct PSCo to file an application to join an RTO or ISO, or request a waiver from doing so, by June 1, 2027 — two years earlier than the deadline set in commission rules.

State law requires electric utilities that own and control transmission facilities to join an organized wholesale market (OWM) by 2030. In its original decision, the commission had argued there was “a genuine potential for Public Service to conclude its efforts in organized wholesale market participation with SPP Markets+.” The earlier deadline would “help confirm that Public Service is moving towards its eventual participation in an OWM or is prepared to show why OWM participation is not in the public interest.”

But AEU argued in its reconsideration request that the earlier deadline would dramatically increase the odds that PSCo, an Xcel Energy subsidiary, would seek a waiver from RTO or ISO participation and that the waiver would be granted. Fewer data about the benefits of SPP’s RTO West, also known as the RTO Expansion, would be available then, AEU said, and alternatives available through the West-Wide Governance Pathways Initiative would likely be at an early stage.

Commissioners agreed and reset the deadline to June 1, 2029.

In another change to its earlier decision, the commission addressed concerns that PSCo would use the money spent on joining Markets+ as an argument against RTO participation. The commission directed PSCo to exclude sunk costs in the cost-benefit analysis of joining an RTO.

Public Interest Finding

Under commission regulations, transmission utilities that want to participate in a day-ahead market must demonstrate three things: The market must have protocols in place for greenhouse gas emissions tracking and accounting; it must have a plan to address seams issues with neighboring markets; and the expected benefits of joining the market must exceed costs, as shown by modeling and other analysis.

Parties that sought reconsideration said the GHG protocols and seams strategies for Markets+ are not fully developed. They said a Western Markets Exploratory Group study that analyzed costs and benefits was based on “flawed assumptions and outdated market footprint.”

WRA argued that the commission “should not make a public interest determination before requiring the company to evaluate participation in other markets,” including CAISO’s Extended Day Ahead Market.

Blank pointed to a previous commission determination that utility participation in an energy imbalance market, a day-ahead market, an RTO, a power pool or a joint tariff is generally in the public interest. The determination was based on a study commissioned to meet requirements of the Colorado Transmission Coordination Act of 2019.

But Gilman sided with the groups requesting reconsideration. She said she plans to again write a dissent to the commission’s decision.

“Plain and simple, the company failed to provide the evidence that met the public interest requirement in the rules,” she said.

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NERC Managers Share 2026 Priorities

Speaking to members of NERC’s Reliability and Security Technical Committee, ERO Director of Reliability Assessments John Moura said the organization will continue to follow priorities developed over its previous three-year plan, which expired at the end of 2025.

Moura joined the RSTC’s annual work plan summit, hosted at the headquarters of Oglethorpe Power on Jan. 20, to share the ERO’s work plan priorities for 2026. NERC CEO Jim Robb said in 2025 that the ERO planned to approach 2026 as a “bridge year” between three-year plans in light of uncertainty around multiple issues including large loads, gas-electric coordination and trade policy that made long-term planning “a fool’s mission” at the time. (See 2026 to be ‘Bridge Year’ for NERC Budget.)

NERC is “already working on [the] next revision of a long-term strategy,” Moura said, but in the meantime is following the priorities of the previous plan. Those priorities are grouped into four categories: energy, security, engagement, and agility and sustainability.

The energy category involves “deepening and broadening” stakeholders’ understanding of reliability risks by improving the ERO’s reliability assessments. Interconnection-wide energy assessments will be a part of this effort beginning next year after a pilot program launched in 2025 to establish common platforms and standardized assumptions for the Eastern, Western and Texas interconnections, Moura said.

Another aspect of the energy category is addressing the reliability risks posed by data centers and other large loads by completing reliability guidelines that are already under development and developing new reliability standards if necessary. NERC may also conduct industry outreach and education on mitigation measures.

The next category, security, involves the rapidly developing landscape of threats against the grid’s cyber and physical assets. NERC aims to advance the grid’s resilience through multiple initiatives, including threat analysis through the Electricity Information Sharing and Analysis Center, the GridSecCon security conference and other mechanisms. NERC will also keep industry and policy makers informed of security threats and other priorities as part of the third category, engagement.

The final priority, agility and sustainability, involves updating the ERO’s internal process. A major area of focus here is the ERO’s efforts to modernize its standards development process. Moura also included NERC’s work on improving data access and efficiency by enhancing its software tools and leveraging artificial intelligence tools where appropriate.

Asked by RSTC Chair Rich Hydzik what issues NERC sees as most pressing in terms of impacts on grid reliability, Moura named the growth of demand outstripping the pace of construction, along with shifts in demand that challenge grid planners’ assumptions.

“I think the biggest trend we’ve seen … is this shift from summer risk, where you traditionally were peaking … and that’s slowly changing, where we’re actually seeing a lot of risk during the winter,” Moura said. “Not a lot of solutions that we’re building are for winter. We’re building a lot of storage, a lot of solar, [and that’s] not very good for winter.”

NERC Chief Engineer Mark Lauby added that the grid’s dynamic performance is another growing source of concern for the ERO, suggesting that building the tools to understand the system must be a priority for grid planners.

“How do we design the system so that it [has] the stiffness it needs [and] the ability to sustain events on the system? We need to have good dynamic models to do that,” Lauby said. “I worry that, right now, I don’t think we have a real good perspective of what’s happening on the interconnection and what’s happening on your neighbor’s system, and how that’s going to impact your system. So I think those are the things that keep me up at night.”

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Could the U.K.’s Cap-and-Floor Model Unlock Interregional Tx in the U.S.?

Setting up cost floors and caps for transmission lines can help get major transmission connections between markets built, said experts in a webinar hosted by the American Council on Renewable Energy (ACORE) on Jan. 20.

The U.K. has used that method to finance major new interconnectors with different markets on the European mainland and Ireland, and advocates said it could help get interregional lines financed and built in the United States.

Using floors and caps for major transmission lines combines the investment certainty from regulated rates and merchant exposure that optimizes asset use, said Regulatory Assistance Project Principal Jennifer Chen.

“Regulated interregional transmission is challenging because balkanized planning and disagreements between neighboring authorities on shared costs borne by their respective captive ratepayers can present issues,” Chen said. “On the other hand, purely merchant financing faces challenges with upfront investment and certainty, amongst other issues.”

Cap-and-floor is a financing model that combines approaches from both with the floor offering certainty and the cap allowing trading potential to be maximized. Customers get paid back if revenue exceeds the cap over a set period, and the floor requires ratebase customers to pay to meet it when market revenues fall short.

“Projects can create more value than in a purely regulated setting. That value can be shared with customers,” Chen said. “The costs of the projects are allocated to the markets, to those procuring transmission services, instead of defaulting to captive ratepayers.”

Since being implemented in 2014, the method has led to several major transmission links between Great Britain and other countries. Great Britain is regulated by the Office of Gas and Electricity Markets (Ofgem), while National Grid runs the transmission system for England and Wales.

Regulators have issued several solicitation windows since 2014 and picked projects that produced net benefits and filled a need on Great Britain’s grid.

“The first interconnectors in Great Britain were developed under a merchant model where revenues were fully exposed to market risks and developers would seek exemptions from certain regulatory requirements,” said Ofgem’s Megan Jones.

Then, in 2007, the European Commission put a cap on revenue for an interconnector between Great Britain and the Netherlands called “BritNed.”

“Because of this decision to impose this additional condition, there was a risk that the merchant model, and therefore interconnected development more broadly, could become less attractive to investors and developers,” Jones said.

Working with regulators in Belgium, Ofgem introduced the cap-and-floor model in 2014 to make merchant interconnectors viable again.

“Developers are incentivized to invest in a project where the potential market value of an interconnector and the consequent revenues are greatest compared with their costs,” Jones said. This means that there is also an incentive for developers to keep delivery and operation costs down.”

Those incentives minimize the risk that consumers will have to pay anything to ensure interconnectors’ revenue meets the floor price, she added.

Ofgem has open three solicitation windows so far in 2014, 2016 and 2022. Before then, Great Britain had four connections with neighboring countries, and since then, four more have been completed, one is under construction, and seven more have won regulatory approval, Jones said. They have created 5.3 GW of transfer capacity and see flows go both ways, though for now, Great Britain is a net importer.

“Various projects have returned revenues above the cap to consumers, and at the moment, that currently amounts to roughly 300 million pounds having been returned,” Jones said.

National Grid has participated in those solicitations through its subsidiary National Grid Ventures, said the latter’s Mark Tunney. It’s still possible to build interconnectors without the cap-and-floor model, but those projects are much rarer.

“We submit all of our various parameters into Ofgem in order to assess the cap and the floor,” Tunney said. “So, what is the capital cost we spent? What are the ‘OPEX’ costs that we anticipate? Our tax, the allowed return, is calculated by Ofgem, etc. And they form the cap and the floor.”

The revenues are measured against the cap and the floor every five years for the lines National Grid has constructed, but Tunney said that could be cut down to one year to work better with different business models.

After the lines get built, Ofgem does an audit of the construction process and its costs, and Tunney said National Grid Ventures has gotten somewhere between 97 and 99% of its project costs approved for the floor under that process. Ofgem also allows changes in the floor-and-cap parameters over the project’s life if rules and regulations change that require more spending, he added.

Grid United develops interregional transmission lines in the United States, which operate like the interconnectors across the Atlantic, and has been interested in using the cap-and-floor model since learning about it several years ago, said CEO Michael Skelly.

“We have talked to a number of policymakers here in the U.S. about this idea, and I think there’s some real interest out there,” Skelly said. “We would need to build momentum and so on. But the reasons that we’re enthusiastic overall because it may help us cut through the Gordian knot that we have here in the U.S. — how are we going to pay for new transmission?”

Grid United has done some calculations on different projects and found that the cap-and-floor method could lower revenue requirements for major transmissions by 30 to 40%, he added.

But getting the method in place will require some outreach to regulators so they understand how it works and, given the political climate here, the concept could use a rebrand.

“We’ll have to come up with a new name here in the U.S. because people might think this is some carbon thing, which we may have a hard time to sell,” Skelly said. “But there’s lots of clever people out there that can figure out how to sell it.”

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Energy Affordability Dominating State Politics Across New England

Debates about affordability continue to dominate state-level energy policy debates throughout New England, shifting the focus away from decarbonization, a panel of experienced lobbyists said at a webinar held by the Northeast Energy and Commerce Association on Jan. 16.

All six New England states face gubernatorial elections in 2026, while U.S. Senate races in Maine, Massachusetts and New Hampshire are drawing significant attention. As federal and local political races heat up, energy affordability is poised to be a key issue, several speakers said.

Christopher Boyle, a lobbyist and former Rhode Island House majority whip, said he has seen “a sea change in how we’re looking at energy in the General Assembly and the governor’s office.”

He noted that Rhode Island Gov. Dan McKee (D) did not mention climate change during his Jan. 13 State of the State address, and has proposed pushing the state’s target for achieving 100% clean energy from 2033 to 2050. McKee also has proposed a cap on energy efficiency spending.

In Massachusetts, Republican challengers have frequently criticized Gov. Maura Healey on the topic of energy affordability, said Jen Gorke of TSK Associates. She noted that the spike in energy prices in the past winter “led to affordability being on the agenda in a way that I have never seen it in Massachusetts.”

But while there is broad agreement that energy affordability is a problem that must be addressed, there is significant disagreement about its root cause, Gorke said, noting that “if you don’t agree on the cause, you can’t agree on the solution.”

“There’s kind of two camps, and a lot of people in the middle,” she added. “Some see our leadership on clean energy and climate as the driver of high cost, while others see those exact same things as the path to lower cost and greater stability and reliability in the future.”

A pair of energy bills introduced in Massachusetts in 2025 exemplified some of the divergence in approaches to addressing energy affordability.

In May, the Healey administration proposed a wide-ranging bill that would tighten regulations around residential competitive electricity supply; allow utilities to issue bonds to help cover costs of the clean energy transition; expand the state Department of Energy Resources’ (DOER’s) procurement authority; and reduce net metering rates for new large solar resources. (See Mass. Gov. Healey Introduces Energy Affordability Bill.)

In contrast, the House members of the legislature’s Joint Committee on Telecommunications, Utilities and Energy (TUE) advanced a bill in November that drew significant public pushback from environmental advocates. While the bill included similar competitive supply regulations and expanded procurement authority for the DOER, it also would cut energy efficiency spending, reduce the annual requirements of the state’s Renewable Portfolio Standard and undermine several key components of the state’s heating electrification strategy. (See Top Mass. House Members Seeking Major Rollback of Climate Laws.)

These debates may heat up in 2026; House lawmakers seek to advance a version of the TUE bill out of the House Ways and Means Committee, while the Senate likely will produce its own version of an energy bill. Historically, the Senate has tended to side with climate advocates on energy policy debates and recently has looked to cut energy costs by reining in spending on the gas system.

Gorke added the Trump administration continues to have a major effect on all aspects of state government, including energy policy, with particularly large impacts on the state’s offshore wind industry.

“Offshore wind was the key tool for Massachusetts and was really expected to carry a big share of the clean energy transition,” she said. “People are trying to be very creative about how we can plug these holes and keep the momentum, but it has a big impact.”

She added there’s significant concern the Trump administration’s antagonism toward offshore wind will have a long-term chilling effect on investment in future projects even if the current crop of under-construction projects overcomes the administration’s obstacles.

“For Rhode Island, offshore wind is the holy grail of our policy,” said Boyle. He added that, while Revolution Wind may be able to finish construction, the future of SouthCoast Wind is far murkier. “I think the SouthCoast project is the one that is going to really have a material, substantial effect … it’s obviously both an energy issue and a jobs issue having an impact from Washington.”

As offshore wind struggles, Maine’s ongoing solicitation of 1,200 MW of onshore wind in the northern part of the state appears to be increasingly important for the clean energy goals of the southern New England states, said Jeremy Payne, a Maine-based lobbyist for Cornerstone Government Affairs. (See Maine PUC Issues Multistate Transmission, Generation Procurement.)

Four other New England states are collaborating with Maine on the procurement, while ISO-NE’s complementary Longer-term Transmission Planning procurement has the backing of all six New England states. Payne speculated Maine may look to procure some of the energy from the Millstone Nuclear Power Plant in Connecticut in exchange for Connecticut’s procurement of onshore wind in the Northern Maine RFP.

Millstone is under contract with Connecticut electric utilities through 2029, with the utilities required to purchase about half of the plant’s power and all its environmental attributes over the period. The state repeatedly has expressed interest in including other states in subsequent contracts.

“Connecticut has long been interested in nuclear — has long seen its value — but does believe that it has to be a regional resource, because currently the burden is on Connecticut electricity ratepayers,” said Nicole Tomassetti, partner at Capitol Strategies Group.

There’s broad interest across states in exploring the potential of small modular nuclear reactors (SMRs). While it’s difficult to forecast future costs for the early-stage technology, a 2024 study by ISO-NE estimated that adding about 15 GW of SMRs by 2050 could enable the region to meet state decarbonization goals at 33% less capital cost than the renewable-dominated base scenario.

“We have a pretty big political divide here, and obviously we’re in a campaign year, so that makes it even more pronounced, but I think nuclear is one of the few topics where the Democrats and the Republicans can agree that there’s some potential,” said Heidi Kroll, a New Hampshire-based lobbyist for J. Grimbilas Strategic Solutions.

New England has a long history with nuclear power; it was home to a boom in both nuclear development and anti-nuclear activism in the latter half of the 20th century. After a series of major plant retirements over a period of about 25 years starting in the mid-1990s, only Millstone in Connecticut and Seabrook Station in New Hampshire remain.

In Rhode Island, the mere mention of nuclear power in legislative hearings used to elicit “groans and moans and screams and eye rolling,” Boyle said. “The fact that it has become part of an accepted methodology to solve this problem, I find historically very interesting.”

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ERCOT Generation Netting Isn’t Yet Investment Grade for Renewable Firmed Data Centers

Alexandre Alonso Carpintero |

By Alexandre Alonso Carpintero

ERCOT is absorbing a wave of large, price‑sensitive load, especially data centers, faster than the market rules were built to “productize.”

ERCOT planning materials show about 226 GW of large loads seeking interconnection as of Nov. 18, 2025 (up from 63 GW in December 2024), with about 225 new large‑load requests submitted in 2025 and about 73% of the queue attributed to data centers. If the finance path for renewable‑firmed supply is uncertain, the default “under-writeable” answer becomes on‑site gas.

What Generation Netting Really is

Generation netting for ERCOT‑polled settlement (EPS) meters (Protocol 10.3.2.3) is a settlement boundary rule: Under specific electrical configurations and metering constraints, ERCOT may settle a paired generator and load on a net basis. The protocol is intentionally restrictive (“generation netting is not allowed except under” defined conditions) and depends on site topology (e.g., common switchyard concepts, EPS metering points and limits on alternate grid connections). Netting can reduce settled energy volume. It does not convert a complex behind‑the‑meter campus into a financeable product. (See Aurora Research Report.)

Why it Fails the ‘Investment‑grade’ Test

Credit committees don’t finance “net MWh.” They finance the residual risk stack, especially correlated tail risk. Even with netting, a renewable‑firmed data center typically retains:

    • Scarcity price tail on backup imports. ERCOT’s systemwide offer cap (HCAP/SWOC) remains $5,000/MWh (with a low cap framework that can apply under certain conditions).
    • Congestion/basis risk (nodal price separation between where supply is produced and where load settles).
    • Operational/curtailment risk: the usable “firming” value of renewables plus storage can degrade precisely when the grid is stressed (telemetry/dispatch constraints, emergency operating modes or required load shedding).
    • Administrative/process risk: eligibility, metering design and true‑ups can become bespoke legal/settlement work, hard to replicate across multiple campuses.

Residual risk stack after Generation Netting | Alexandre Alonso Carpintero

SB 6 Adds Layer of Uncertainty

Texas SB 6 (effective June 20, 2025) added PURA §39.169, requiring system‑impact review of certain net‑metering arrangements involving new large loads and stand‑alone generation. ERCOT’s market notice M‑B090225‑01 implements interim procedures, publishes a list of stand‑alone generation resources (as of Sept. 1, 2025), and states the process may change or be pre-empted by forthcoming Public Utility Commission of Texas rules.

ERCOT’s large‑load interconnection Q&A further notes that some arrangements involving existing “stand‑alone” resources require approval through the net metering review process before the load can be energized. “Interim and subject to change” is not bankable language when you’re trying to finance repeatable, gigawatt‑scale campuses.

A Simplified 300-MW Hybrid Example (Wind + Solar + BESS)

Assume a 300-MW flat-load campus behind EPS metering with 300 MW of wind plus 300 MW of solar plus a 100-MW, 400-MWh (four‑hour) battery. Netting can reduce settled imports across many hours. The financing problem is the tail.

Illustrative stress case: 20 scarcity hours per year when renewables are low and the battery is depleted or held for contingency. If the campus must import 100 MW during those hours and real‑time prices clear at $5,000/MWh, the annual cost is: 20 h × 100 MW × $5,000/MWh = $10 million.

That volatility is correlated with grid stress and uptime risk. The easiest way to cap both is a 300-MW on‑site gas plant, hence gas becoming the “insurance policy” for load growth.

What ‘Netting Plus’ Should Standardize

ERCOT does not need to copy another RTO. It needs standardized pathways that turn behind‑the‑meter engineering into predictable settlement plus performance rules:

    • Campus netting: standardized netting across a defined private network footprint (multiple meters/feeders under common control) with clear telemetry and true‑up rules.
    • Measurable firmness: a standardized add‑on (e.g., a performance obligation or ancillary‑service bundle) that lets large load pair renewables with qualifying firming (storage, fast response, contracted curtailment) and get settleable credit.
    • Clear hybrid “serve‑load‑first” rules: reduce ambiguity for storage charging/discharging, exports and when the site is acting as load vs generation.
    • Transparent backup settlement: make residual grid exposure bounded and hedge-able rather than a surprise.

Protocol 10.3.2.3 is a starting point. “Netting plus” is what makes renewable‑firmed data centers financeable at scale.

Alexandre Alonso Carpintero works on market design and commercial structures for large loads, including data centers.

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Company Briefs

Toyota, Lightsource bp Agree to VPPA

Toyota and Lightsource bp announced a 15-year virtual power purchase agreement.

Toyota will purchase energy from Lightsource’s 231-MW Jones City 2 solar project in Texas. Toyota Environmental Sustainability General Manager Tim Hilgeman said the agreement could cover more than 20% of the car maker’s purchased electricity needs in North America.

More: Renewables Now

Google Taps Clearway for 1.2 GW of Carbon-free Power

Clearway Energy Group struck three deals with Google to supply the tech group with carbon-free power from 1.2 GW of capacity in Missouri, Texas and West Virginia.

The three power purchase agreements will support Google’s data centers in the SPP, ERCOT and PJM markets for up to 20 years.

All plants are slated to enter the construction phase in 2026, with the first ones expected to become operational in 2027 and 2028.

More: Renewables Now

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Federal Briefs

Congress Passes FY 2026 Energy Funding Bill

The U.S. Senate voted 82-14 to pass an Energy and Water Development appropriations bill that will fund the Department of Energy, Army Corps of Engineers and Bureau of Reclamation for fiscal year 2026.

The bill appropriates just over $49 billion for DOE.

The House of Representatives passed the bill on Jan. 8, and it is expected that President Donald Trump will sign it into law prior to the funding deadline on Jan. 31.

More: Holland & Knight

2025 Among 3 Hottest Years on Record

2025 was the Earth’s second or third-hottest year on record, several U.S. and global climate science organizations said.

The National Oceanic and Atmospheric Administration, as well as the EU’s Copernicus and the U.K.’s Met Office, found that 2025 was the third-hottest year recorded. NASA found 2025 to be the second-hottest year, though the numbers were so close it was effectively tied with 2023.

The last three years are the three hottest the planet has ever faced, with 2024 being the warmest ever.

More: The Hill