Banding Together: How Aggregation Helps Cities Buy Renewables at Scale
By Yuning Liu & Mia Reback
In March 2021, 24 local governments in Maryland joined together on a plan to purchase enough renewable energy to power more than 246,000 homes a year. They did this by issuing a joint request for proposal (RFP) through the Baltimore Regional Cooperative Purchasing Committee (BRCPC) to seek a supply of up to 240,000 MWh of renewable energy starting in 2022. This large-scale transaction was made possible by an energy procurement approach known as energy aggregation, which is a way for two or more buyers to purchase electricity from a utility-scale generation facility.
According to the new Intergovernmental Panel on Climate Change (IPCC) report, greenhouse gas emissions (GHGs) must peak within four years to limit global warming to 1.5°C, and cities have a critical role to play in meeting that target. Aggregation can be a powerful way for cities to rapidly increase their renewable energy and help decarbonize local economies at the necessary speed and scale. Yet most cities have not pursued aggregation due to an inadequate understanding of its novel deal structure and a lack of tools and resources to help streamline the process.
Aggregation can be a powerful way for cities to rapidly increase their renewable energy and help decarbonize local economies at the necessary speed and scale.
To help cities overcome these barriers, last year the American Cities Climate Challenge Renewables Accelerator, an initiative co-led by RMI and World Resources Institute, began organizing a Large-Scale Renewables Aggregation Cohort. This cohort provided technical assistance to more than 30 organizations, including the BRCP. A second iteration of the cohort is now underway with a new group of organizations. In addition, a newly released RMI report, Procuring Large-Scale Renewables through Aggregation: A Guide for Local Governments aims to help more cities understand and pursue aggregation.
As more and more cities take actions to decarbonize the electricity system, aggregation will be an increasingly important option that can provide buyers with several advantages, such as opening doors for smaller cities, creating positive network effects, and unlocking more cost savings.
Enabling Smaller Buyers to Access Large-Scale Projects
Aggregation can enable participation from smaller cities that, on their own, are not able to purchase enough electricity to warrant the attention from developers. This is particularly important for smaller communities with 100 percent renewable energy goals, as most municipalities cannot supply 100 percent of their electricity needs with on-site solar generation alone. Therefore, a utility-scale, off-site procurement will be an essential component of many smaller buyers’ decarbonization strategy.
One instance of a small buyer accessing large-scale renewables projects is a 25 MW joint solar purchase completed by MIT, Boston Medical Center (BMC), and Post Office Square (POS) in 2016. In this aggregated deal, MIT committed to buy 73 percent of the power generated by the new array, with BMC purchasing 26 percent and POS purchasing the remainder.
“Entering into a renewable power purchase agreement was our next step, but our consumption is too small to do it alone,” said Pamela Messenger, general manager of Friends of POS. “It is exciting to join forces with two industry leaders, allowing us to mitigate 100 percent of our electricity footprint.”
Similarly, other smaller local governments have also used aggregation to gain access, such as five local governments in Maine. They teamed up for the state’s first multi-town renewables project, a 4 MW solar array, which provides climate benefits equivalent to more than 4,000 acres of forests.
Without pooling the electricity demand with other buyers, smaller cities would not be able to access utility-scale projects on their own, making it difficult to reduce their carbon emissions efficiently.
Creating Knowledge-Sharing Opportunities
By joining together, cities can not only aggregate their buying power but also pool their knowledge to streamline procurement processes. The shared experience among participants can generate positive network effects, including increased mentorship, increased credibility, and support for inexperienced buyers.
For example, the City of Nashville partnered with Vanderbilt University last year to purchase electricity from a 125 MW solar project as part of the Tennessee Valley Authority’s Green Invest program. This public-private partnership allowed the city to leverage the expertise of the University’s Large-Scale Renewable Energy Study Advisory Committee to identify the best risk mitigation strategy.
According to Susan R. Wente, interim chancellor of Vanderbilt University, “We want this partnership to serve as a model of collaboration that other organizations within our region and beyond can replicate to make long-term, lasting changes to protect our shared environment.” In fact, the connections formed within the aggregation group have garnered national media attention and are sending a powerful signal to utilities, policymakers, and developers that local governments are serious about rapidly decarbonizing the electricity system.
In addition, a group of buyers can also share external lawyers, accountants, or consultants. For instance, 15 Pennsylvania municipalities and public entities, which also participated in the Renewables Accelerator’s Large-Scale Renewables Aggregation Cohort, have teamed up to investigate the viability of investing in a joint solar deal. The 15 entities issued a joint RFP for energy consultants in May 2021 to share external advisory services.
Unlocking More Cost Savings
Throughout the collaborative process, aggregated deals can produce various cost savings because they enable cities to achieve greater economies of scale by combining the renewable energy demands of multiple buyers.
For example, a National Renewable Energy Laboratory analysis estimates that procuring 100 MW of solar instead of 5 MW can reduce development costs by 24 percent. This can lead to cost savings in the form of lower power purchase agreement prices for all buyers, regardless of size.
In another case, the company Enel X, which is working with the BRCPC on a joint purchasing strategy, found that renewable energy projects typically must be over 20 MW in size to be economical. The company discovered that aggregation is one way for smaller buyers to participate in large projects.
In Florida, 12 cities joined together to form the Florida Municipal Solar Project. They are developing 372.5 MW of zero-emissions energy capacity, enough to power 75,000 Florida homes. According to Jacob Williams, CEO and general manager of the Florida Municipal Power Agency, “By working together, our cities are able to provide clean power to their communities in a cost-effective way.” Clint Bullock, Orlando Utilities Commission general manager and CEO, explained, “We can leverage the economies of scale to bring the price of solar down to a point where a dozen municipal utilities can afford to sign on and I believe this is something people around the country will take notice of.”
Better Together
As more cities set goals to transition to renewables, aggregation is democratizing clean energy access by enabling participants, especially smaller buyers, to collectively develop significantly larger renewables projects than any one buyer would be able to access individually. The partnerships can create positive network effects through knowledge sharing and inspire other organizations within the region to replicate the collaboration model. By unlocking more cost savings, aggregated deals provide a lower-cost mechanism for cities to achieve climate goals efficiently.
The new IPCC report underscores the urgency of decarbonizing the electricity system and reducing GHGs. To play their part, cities need to increase the pace and scale of renewable energy procurement. Although aggregation is still a relatively underutilized procurement method, this approach is crucial to help them do that.
Procuring Large-Scale Renewables through Aggregation: A Guide for Local Governments helps walk local governments through the aggregated procurement process step-by-step and links to other key tools and resources relevant to each stage.
Cities must act now to curb greenhouse gas emissions. The best path forward involves engaging all actors and ensuring a more promising economic structure for a wide array of purchasers. In the battle against climate change, it is better to aggregate than to go it alone.
Article courtesy of RMI.
Fossil fuels just hit a record low in the US electricity mix last month, while solar and wind soared to all-time highs, according to fresh data from global energy think tank Ember.
In March 2025, fossil fuels accounted for less than 50% – 49.2% – of electricity generated for the first month on record. This beats the previous monthly record low of 51% set in April 2024.
“This clearly demonstrates the growing role of wind and solar in the US energy system,” said Nicolas Fulghum, senior analyst at global energy think tank Ember. “This is a first signal that the US is approaching a tipping point where clean power takes the lead over fossil generation, and where the importance of coal and gas inevitably starts to fade.”
What this means is that clean energy generated more than half – 50.8% – of US electricity for the first month on record. The record was driven by a surge in wind and solar power, which hit a new high of 24.4% of US electricity in March 2025.
In March 2025, US solar increased an astonishing 37% (+8.3 TWh) compared to March 2024. Wind increased by 12% (+5.7 TWh). Together, wind and solar reached an all-time high, generating 83 TWh of US electricity, 11% higher than the previous record of 75 TWh set in April 2024. Fossil fuel generation fell by 2.5% (-4.3 TWh) compared to March 2024.
The milestone is the result of a long-term decline of fossil generation in the US power sector, with wind and solar growing substantially over the last decade. In March 2015, fossil generation still provided 65% of US electricity generation. Wind and solar generation stood at just 5.7%. Since then, the share of wind and solar power has more than quadrupled.
“Wind and solar power are pushing fossil fuels out of the mix,” said Fulghum. “The reality on the ground is not one of a return to fossil fuels in the US, it’s the continued growth of solar and wind power that will be the dominant driver of electricity generation growth in the US.”
Solar power is set to account for more than half of new generating capacity installed in the US in 2025, with more than a third of new solar panels going to Texas. Solar adoption has exploded in just a decade. In March 2015, solar power accounted for just 1% of US electricity generation. By March 2025, it’s grown to 9.2%.
Last month, Ember published the report “US Electricity 2025,” which covered changes and trends in the US power sector in 2024. Solar was the fastest and largest growing source of electricity in the US in 2024. Wind and solar combined rose to a record 17% of the US electricity mix in 2024, overtaking coal for the first time, which accounted for 15%.
Read more: Made-in-America solar just got a big win in Louisiana
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Lease deals get all the hype, but most people still want to own the car after they’re done making all those payments on it. If that sounds like you, and you’ve been waiting for the interest rates on auto loans to drop, you’re in luck: there are a bunch of great plug-in cars you can buy with 0% financing and at pre-tariff prices this April!
As I was putting this list together, I realized there were plenty of ways for me to present this information. “Best EVs ..?” Too opinion based. “Cheapest EVs ..?” Too much research. “Best deal ..?” That’s usually subjective, but as automakers and dealers rush to raise prices in anticipation of Trump’s tariffs, two brands – Ford and Nissan – stand apart.
In the end, I went with alphabetical order, by make, so you’ll find out more about Ford and Nissan’s approach to the new market reality when you get to them. And, as for which deals are new this month? You’re just gonna have to read the article. Enjoy!
Acura ZDX
Manufactured in Spring Hill, Tennessee, the 2024 Acura ZDX uses a GM Ultium battery and drive motors, but the styling, interior, and infotainment software are all Honda. That means you’ll get a solidly-built EV with GM levels of parts support and Honda levels of fit, finish, and quality control. All that plus Apple CarPlay and (through April 30th) 0% financing for up to 72 months makes the ZDX one the best sporty crossover values in the business.
Chevy Blazer, Equinox EVs
Both the Chevy Blazer EV and Equinox EV are manufactured at GM’s Ramos Arizpe plant in Coahuila, Mexico, and each offers their own takes on the five-passenger family SUV. Despite any incoming tariffs, the crossovers you’ll find on dealer lots today still represent a solid value, with the cost of base model Equinox LT FWD models with 319 miles of EPA-rated range dropping to just $27,500 after you apply the $7,500 Federal tax credit (for now, still a thing).
Chrysler Pacifica PHEV
When the plug-in hybrid version of the Chrysler Pacifica minivan first went on sale all the way back in 2016, it seemed to imply that the old Chrysler Corporation was going to race ahead of the other Big Three US carmakers.
That didn’t happen, but the Pacifica is still the king of cupholders, while the van’s stow n’ go seating, and all the other practical, clever details that add up to remind you Chrysler invented these things – and through April 30th, you can get 0% financing for up to 72 months on 2025 MY examples of this made-in-Canada plug-in hybrid and cover up to 32 miles of your daily driving needs on the clean, pure power of electrons.
Ford Mustang Mach-E
As I mentioned at the top of the article, both Ford and Nissan have taken steps to push back against the Trump tariffs – and in Ford’s case, that means big discounts, employee pricing for all, and free chargers for EV buyers.
In addition to employee pricing, 2024 Mustang Mach-Es continue to offer 0% APR financing for up to 72 months. That offer appears to be stackable with $2,500 in bonus cash, too, and Tesla owners and lessees can also score $1,000 in conquest cash for up to $3,500 off.
GMC HUMMER EV
The biggest of the Ultium-based EVs, these Hamtramck, Michigan-built machines are seriously impressive EVs, with shockingly quick acceleration and on-road handling that seems to defy the laws of physics once you understand that these are, essentially, medium-duty trucks. If you’re a fan of heavy metal (and plastic), you’ll definitely want to stop by your local GMC dealer and give the rugged GMC HUMMER EV a test drive.
Honda Prologue
Manufactured alongside its GM siblings at the Ramos Arizpe plant in Coahuila, Mexico, the hot-selling Honda Prologue pairs GM’s excellent Ultium platform with Honda sensibilities and Apple CarPlay to create a winning combination.
If you’ve been holding off, we’ve got good news: there’s still a few remaining 2024 models in dealer inventory out there. To make room for the 2025 models, Honda is offering 0% APR for up to 72 months on the remaining 2024s.
Click here to find a 0% interest (72 mo.) deal on a 2024 Prologue near you.
Hyundai IONIQ 6
The ultra-efficient Hyundai IONIQ 6 is one of the most compelling Model 3 competitors out there – but that could change if the Korean-built sedan gets hit with heavy tariffs. To make sure that doesn’t happen, Hyundai is investing tens of billions of dollars into a US manufacturing base, creating new American jobs and ensuring (kinda) that it can continue to deliver real value to its customers.
The fast-charging IONIQ 6 offers up to 342 miles of range on its most efficient version, while even the shortest range models offer 220 miles of range. Through April 30th, Hyundai is offering a rare 0% interest deal on remaining 2024 examples of its slippery sedan for up to 48 months.
All the Kia EVs
Kia has something for just about everyone in its EV range, from the fun, compact, and underrated Niro EV to the practical three-row EV9 to the supercar-baiting performance of the Kia EV6 – a car that made its global debut on a drag strip running alongside a Lamborghini, a Porsche, and an AMG Mercedes GT.
Through April 30th, you can get 0% interest on just about every new EV you’ll find on your Kia dealer’s lot (minus 2025 Kia EV6 models). Click the links below to find yours.
Mitsubishi Outlander PHEV
One of the first three-row plugin cars to hit the market, Mitsubishi’s Outlander PHEV has always presented a strong value proposition with up to 38 miles of electric range from its 20 kWh li-ion battery and room for seven (in a pinch), making it a great “lily pad” vehicle for suburban families who want to drive electric but still worry about being able to find a charging station when they need one.
That might change when the tariffs take full effect, however – so if you’re looking for an affordable 7-passenger plug-in with a great safety rating at a reasonably affordable price, act fast.
Nissan Ariya
I’ve already said that the Nissan Ariya didn’t get a fair shake. If you click that link, you’ll read about a car that offers solid driving dynamics, innovative interior design, and all the practicality that makes five-passenger crossovers the must-haves they’ve become for most families. Now, Nissan is slashing prices across the line as their competitors are raising theirs, making the case for the Ariya even stronger than before.
With great discounts available at participating dealers, Supercharger access, and 0% interest from Nissan for up to 72 months on both 2024 and 25 MY Ariya EVs.
Toyota bZ4X
Built in Toyota City, Japan, the bZ4X EV is a capable, dependable crossover with room for five and Toyota’s reputation for reliability and longevity to boot. With 0% financing and big discounts on both 2024 and 2025 models, the bZ4X might be the best deal on your local Toyota dealer’s lot.
Volkswagen ID.4
One of the most popular legacy EVs, the ID.4 offers Volkswagen build quality and (for 2024) a Chat-GPT enabled interface. To keep ID.4 sales rolling, VW dealers are getting aggressive with discounts, making this fast-charging, 291 mile EPA-rated range, 5-star safety rated EV a value proposition that’s tough to beat.
This month, get a Volkswagen ID.4 fresh from the company’s Chattanooga, Tennessee assembly plant with 0% financing for up to 72 months plus a $5,000 customer cash bonus on remaining 2024 models to stack with it.
Disclaimer: the vehicle models and financing deals above were sourced from CarsDirect, CarEdge, CarFax, USNews, and (where mentioned) the OEM websites – and were current as of 03APR2025. These deals may not be available in every market, with every discount, or for every buyer (the standard “with approved credit” fine print should be considered implied). Check with your local dealer(s) for more information.
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Environment
Why OPEC+ is accelerating oil production as prices are tanking and tariffs hammer markets
The Phillips 66 Company’s Los Angeles Refinery in California.
Bing Guan | Reuters
The oil price outlook is being hit with more bearish forecasts on the back of U.S. President Donald Trump’s sweeping and market-hammering tariff announcements. Businesses and investors worry that a trade war and lower global growth lies ahead.
Goldman Sachs on Thursday reduced its December 2025 forecasts for global and U.S. benchmarks Brent crude and WTI by $5 to $66 and $62 a barrel, respectively, “because the two key downside risks we have flagged are realizing, namely tariff escalation and somewhat higher OPEC+ supply.”
The bank also cut its forecasts for the oil benchmarks in 2025 and 2026, adding that “we no longer forecast a price range, because price volatility is likely to stay elevated on higher recession risk.” Analysts at S&P Global Market Intelligence predict that in a worst-case scenario, global oil demand growth could be slashed by 500,000 barrels per day.
JPMorgan, for its part, raised its recession odds for the global economy to 60% for this year, up from a previous forecast of 40%.
Markets were therefore stunned when OPEC, which produces about 40% of the world’s crude oil — along with its non-OPEC allies that together comprise OPEC+ — chose not only to go ahead with its previously held plans to increase oil production, but also to nearly triple the expected increase figure.
Eight key OPEC+ producers on Thursday agreed to raise combined crude oil output by 411,000 barrels per day, speeding up the pace of their scheduled hikes and pushing down oil prices. The group — Saudi Arabia, Russia, Iraq, the United Arab Emirates, Kuwait, Kazakhstan, Algeria, and Oman — was widely expected to implement an increase of just under 140,000 barrels per day next month.
The news pushed oil prices 6% lower.
OPEC+ bullishness and appeasing Trump
Several factors underpin the oil-producing alliance’s decision. One is that the group is bullish on oil demand later in the year, putting it firmly in the minority as investor outlooks sour and fears of a global slowdown worsen.
The eight OPEC+ members behind the production decision cited “the continuing healthy market fundamentals and the positive market outlook” in their statement Thursday, saying that “this measure will provide an opportunity for the participating countries to accelerate their compensation.”
The statement added that “the gradual increases may be paused or reversed subject to evolving market conditions.”
Another likely reason for the group’s move has to do with another T-word: the man in the White House, who during his first term in office and from the very start of his second, has loudly demanded that the oil producer group pump more crude to help bring down prices for Americans.
“First of all, this is partly about appeasing Trump,” Saul Kavonic, head of energy research at MST Marquee, told CNBC’s Dan Murphy on Friday.
“Trump will be putting pressure on OPEC to reduce oil prices, which reduces global energy prices, to help offset the inflationary impact of his tariffs.”
OPEC officials have denied that the move was made to appease Trump.
Compliance and market share
Meanwhile, as compliance is a major issue for OPEC+ — with countries overproducing crude beyond their quotas, complicating the group’s efforts to control how much supply it allows into the market — the move could be a way to enforce that, according to Helima Croft, head of global commodity strategy and MENA research at RBC Capital Markets.
“We think a desire by the OPEC leadership to send a warning signal to Kazakhstan, Iraq, and even Russia about the cost of continued overproduction underlies the decision.”
Helima Croft
head of global commodity strategy and MENA research at RBC Capital Markets
“We think a desire by the OPEC leadership to send a warning signal to Kazakhstan, Iraq, and even Russia about the cost of continued overproduction underlies the decision,” Croft wrote in a note published Thursday. She referenced the March 2020 oil price war, when Saudi Arabia flooded the market with supply to tank oil prices and forced Russia back into compliance after Moscow initially refused to curb production to help the alliance stabilize prices. The price war caused Brent crude prices to go as low as $15 a barrel.
The production increases are also “an example of OPEC increasing their market share,” Kavonic said, adding that it “ultimately does come at the expense of the United States [shale] patch,” which U.S. producers likely will not be too thrilled about.
What happens next?
OPEC+ appears confident about the market turning a corner in the coming months on the assumption that oil demand will increase in the summer and the tariff wars will be resolved in the coming months, said Nader Itayim, editorial manager at Argus Media.
“These countries are largely comfortable with the $70, $75 per barrel band,” Itayim said.
What comes next depends on the trajectory of the tariffs and a potential trade war. Oil dropping into the $60 range could force pauses or even a reversal in OPEC+ production increase plans, analysts say – although that is likely to be met with resistance from countries like Iraq and Kazakhstan that have long been itching to increase their oil production for their own revenues.
Whatever happens, the group maintains the flexibility to adapt its plans month by month, Itayim noted.
“If things don’t quite go the way they imagine, all it does take, really, is a phone call.”
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