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.
Enel North America and food and snacks giant Mars have signed a massive clean energy deal that will power up Mars’s operations with Texas solar.
The two companies completed a power purchase agreement (PPA) for the full output – all 851 megawatts (MW) – of three Texas solar farms. Together, those plants are expected to deliver 1.8 terawatt-hours of electricity annually, the equivalent of enough electricity to power 150,000 homes. That makes this Enel’s largest corporate PPA worldwide.
Michele Di Murro, CEO of Enel North America, said the deal “shows how renewables are among the fastest and most affordable solutions to meet the nation’s energy needs. Through these agreements, we’re adding clean capacity to the Texas grid while supporting a leading manufacturer’s sustainability goals.”
For Mars, the move goes beyond just greening its own factories. Kevin Rabinovitch, global VP of sustainability at Mars, explained that this PPA “lets us bring demand for all the electricity used in our value chain to the clean energy market in a highly efficient manner. The more demand we create together, the faster we can build the future we all want.”
All three solar farms will use sheep grazing to manage vegetation, a dual-use practice Enel has scaled through the largest solar grazing agreement in the US.
The 30% federal solar tax credit is ending this year. If you’ve ever considered going solar, now’s the time to act. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them.
Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.
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Lease deals get all the headlines, but 75% of new car buyers still finance their cars, indicating that they want to own their vehicles once the payments are done. If that sounds like you, and you’ve been holding out for relief from sky-high payments, a wave of new EVs are now available with 0% financing — making it one of the best months yet to buy a new EV.
Every month, Electrek readers looking for great deals on a new EV flock to our lease deal posts. Recently, however, the comments have been asking another crucial question: what about EV deals for the people who want to buy, instead of leas?
You asked, we listened. This roundup is for that 75% of new car buyers who choose to finance their cars instead of lease — so here’s a list of all the 0% financing deals on EVs you can get in September, 2025.
As I put this list together, I realized there were plenty of ways for me to present this information. In the end, I decided to present these deals in alphabetical order, by brand name (make). And, as for which deals are new this month? You’re just gonna have to check the list. Enjoy!
Acura ZDX
New for the 2024 model year, the Acura ZDX uses GM Ultium battery and drive technology, but the styling, interior, and infotainment are all Honda, delivering GM-level parts support with Honda-level fit, finish, and quality. Add in standard Apple CarPlay support, 0% financing for up to 72 months, and $7,500 customer cash through September 30th, and the ZDX becomes easily one of the best sporty crossover values on the market.
Chevy Equinox EV
With an impressive combination of affordability, practicality, and advanced features, the Chevy Equinox is a standout EV. And with an EPA-estimated range of up to 319 miles and a starting price under $35,000, it’s no wonder they’re flying off dealer lots.
For well-qualified buyers, Chevrolet is offering 0% APR financing for up to 60 months through GM Financial through September 30th. That offer can be paired with the $7,500 federal EV tax credit (which you can claim at the dealer), along with up to $1,250 in additional discounts for Costco members, depending on membership level.
Dodge Charger
Dodge is hoping that at least a few muscle car enthusiasts with some extra cash will find their way to a Dodge store and ask for the meanest, loudest, tire-shreddingest muscle car on the dealer’s lot without caring too much about what’s under the hood.
For them, Dodge has the new electric Charger with up to 670 battery-backed horsepower. And if you still owed money on the Hemi you just totaled, Dodge will help get the deal done on its latest retro-tastic ride with a $7,750 retail cash allowance or 0% financing for up to 72 months — and that’s before any dealer discounts.
Ford F-150 Lightning
America’s best-selling electric truck offers V2x technology, a nationwide dealer network, a universe of aftermarket accessories, and a look that blends into the crowd. This month, this proven pickup adds 0% interest financing for up to 72 months. Ford Pro customer can get access to advanced telematics and, in some cases, even get help sourcing additional grants and rebates, too.
GMC Hummer EV
The biggest of GM’s Ultium-based EVs are seriously impressive machines, with shockingly quick acceleration, plus on-road handling that seems to defy the laws of physics once you understand that these are, essentially, medium-duty trucks. This month, GMC is doing its best to move out its existing inventory with 0% financing for well-qualified buyers plus $1,250 in discounts for select Costco members. So, if you’re a fan of heavy metal you’ll definitely want to stop by your local GMC dealer and give the Hummer EV a test drive.
GMC Sierra EV
In addition to offering a solid Powerwall alternative, these big Ultium-based EVs from GM’s “three letter bandit” commercial brand are just as impressive as their Hummer stablemates, but one-up the Hummers with heavy-duty towing prowess and the added capability of bidirectional charging baked in. And, like the Hummer, GMC is doing its best to move out its existing inventory of Denali and AT4 model Sierra EVs with 0% financing for well-qualified buyers plus $1,250 in discounts for select Costco members.
Honda Prologue
Like the Acura ZDX at the top of this list, the Honda Prologue was blends the excellent GM Ultium EV platform with Honda sensibilities and Apple CarPlay to create a winning combination. It’s no surprise that it’s one of the top-selling electric crossovers — and to move out as many as possible before the $7,500 federal tax credit goes away, Honda is offering 0% APR for up to 60 plus up to an additional $2,000 in Honda Loyalty or Conquest cash.
Hyundai IONIQ 6
The last of the streamliners, the IONIQ 6 has influences from Ferry Porsche and Raymond Loewy without looking like a copy of either. In addition to being a future classic, it’s efficient, comfortable, quick, offers up to 361 miles of range, can charge just about anywhere, and (now through the end of the month), can be financed with 0% interest for up to 48 months or $7,500 in customer bonus cash on all trims.
If you’re flexible on color, Hyundai dealers with “aged inventory” will give you an extra $1,000, for $8,500 total incentive dollars on your IONIQ 6.
Jeep Wagoneer S
The Jeep Wagoneer S is a slick, capable, street-oriented EV that’s been inexplicably saddled with a sloping roof and spoiler that eats away at the electric SUV’s ultimate utility (that’s the “U” part), but if you can get past that minor caveat, this first-ever battery-powered Jeep is ready to deliver. With $7,750 retail cash allowance or 0% financing for up to 72 months before dealer discounts through September 30th, the Wagoneer S might just be the best EV deal going.
Kia Niro EV
Kia is doing a phenomenal job moving its supercar-baiting EV6 and ultra-capable EV9 family trucksters, but the under-mentioned and underrated little Niro EV seems like it could use a little help. To that end, Kia is offering 0% interest financing or up to $7,500 customer cash on select examples of the little urban runabout now through September 30th.
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. With up to 289 miles of EPA-rated range, Tesla Supercharger access, and 0% interest from Nissan for up to 72 months or up to $10,000 Customer Cash (that’s not a typo) undecided EV buyers could do a lot worse than to give the Ariya a chance to win them over.
Polestar 3
Sleek, Scandinavian, and seriously quick, the Polestar 3 is the lovechild of Swedish brand Volvo and Chinese brand Geely’s billions. As such, it delivers both Scandinavian style and high-tech substance with dual-motor power, a minimalistic, luxurious cabin, and Android Auto baked right in. The Polestar 3 was designed to turn heads while keeping daily driving effortless, and through the month of September, it’s sure to turn even more heads with 0% financing for up to 72 months through Polestar Financial Services and a $10,000 Clean Vehicle Incentive in some markets.
Put it all together, and the Polestar 3 stands out as one of the most compelling premium EV SUV deals of the month.
Subaru Solterra
The first-ever electric Subaru had a rocky start (no pun intended), but this off-road-ready sibling of the Toyota bZ4X seems like a solid mid-size electric crossover with some outdoorsy vibes and left-leaning granola style that offers more than enough utility to carry your mountain bikes to the trail or your inflatables out to the pond. Add in 227 miles of range, some big discounts, and 0% financing for up to 72 months, and this should be a great month for electric Subaru fans to drive home in a new Solterra.
Volkswagen ID.4
One of the most popular legacy EVs both in the US and Europe, the ID.4 offers Volkswagen build quality and zippy around-town handling. Everyone I know who has one loves it, and 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 with 0% financing for up to 72 months or up to $5,000 customer cash. You’ll need to do some math to see which offer works best for you.
Disclaimer: the vehicle models and financing deals above were sourced from CarsDirect, CarEdge, and (where mentioned) the OEM websites – and were current as of 15SEP2025. These deals may not be available in every market, with every discount, or for every buyer (the standard lines of “with approved credit” fine print should be considered implied). Check with your local dealer(s) for more information.
If you’re considering going solar, it’s always a good idea to get quotes from a few installers. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them.
Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.
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EV charging networks SWTCH Energy and FLO have signed a roaming agreement that lets drivers charge on either network with just one app, removing the need to juggle multiple accounts or payment methods.
One of the biggest frustrations for EV owners is charging network fragmentation. Using multiple apps and memberships makes it clunky and time-consuming for drivers to plug in, especially on road trips. This new agreement gives drivers access to tens of thousands of chargers on SWTCH and FLO’s networks.
If you’re using the SWTCH or FLO app, you can now see and use chargers from both networks. Your existing payment method works across the board, and expanded charger visibility makes trip planning easier. That should mean a smoother, more consistent experience.
SWTCH CEO Carter Li said, “SWTCH users now have access to more than 70,000 chargers across North America. We’re creating the seamless, integrated charging ecosystem that drivers deserve.” FLO CEO Louis Tremblay added that FLO’s roaming agreements already give its members access to more than 110,000 public chargers, and teaming up with SWTCH further strengthens that coverage.
Both companies already have roaming deals with other charging networks in Canada and the US.
Read more: FLO’s new Ultra DC fast chargers can charge EVs to 80% in 15 minutes
The 30% federal solar tax credit is ending this year. If you’ve ever considered going solar, now’s the time to act. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them.
Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.
FTC: We use income earning auto affiliate links. More.
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