Construction is underway in St. Paul, Minnesota, on a major affordable housing development that will combine solar, geothermal and all-electric appliances to create one of the region’s largest net-zero communities.

Twin Cities Habitat for Humanity broke ground in June on a four-block, 147-unit project on the site of a former golf course that’s being redeveloped by the city and its port authority, which made the decision to forgo gas hookups. 

Affordable housing and Habitat for Humanity builds in particular have become a front line in the fight over the future of gas. The organization has faced criticism in other communities for accepting fossil fuel industry money and partnering with utilities on “net-zero” homes that include gas appliances. It’s also built several all-electric projects using advanced sustainable construction methods and materials.

The scale of the Twin Cities project is what makes it exciting, according to St. Paul’s chief resilience officer Russ Stark. 

“We’ve had plenty of motivated folks build their own all-electric homes, but they’re one-offs,” he said. “There haven’t been many, if any, at scale.”

Stark added that the project, known as The Heights, was made possible by the federal Inflation Reduction Act. 

“I think it’s fair to say that those pieces couldn’t have all come together without either a much bigger public investment or the Inflation Reduction Act, which ended up being that big public investment,” he said.

A vision emerges

Port Authority President and CEO Todd Hurley said his organization bought the property in 2019 from the Steamfitters Pipefitters Local 455, which maintained it as a golf course until 2017. When no private buyers expressed interest in the property, the Port Authority bought it for $10 million.

Hurley said the Port Authority saw potential for light industrial development and had the experience necessary to deal with mercury pollution from a fungicide the golf course staff sprayed to kill weeds.

“We are a land developer, a brownfield land developer, and one of our missions is to add jobs and tax base around the creation of light industrial jobs,” Hurley said.

The Port Authority worked with the city’s planning department on a master plan that included housing, and it solicited developers to build a mix of market-rate, affordable and low-income units. The housing parcels were eventually sold for $20 million to a private developer, Sherman Associates, which partnered with Habitat and JO Companies, a Black-owned affordable and multi-family housing developer.

“Early on, we identified a very high goal of (becoming) a net zero community,” Hurley said. “Everything we have been working on has been steering towards getting to net zero.”

Twin Cities Habitat President and former St. Paul mayor Chris Coleman said the project met his organization’s strategic plan, which calls for building bigger developments instead of its traditional practice of infilling smaller lots with single-family homes and duplexes. The project will be the largest the organization has ever built in the Twin Cities.

Coleman said the Heights offered an opportunity to fill a need in one of St. Paul’s most diverse and economically challenged neighborhoods and “be part of the biggest investment in the East Side in over 100 years.”

The requirement for all-electric homes merged with Habitat’s goal of constructing more efficient and sustainable homes to drive down utility costs for homeowners, he said. Habitat built solar-ready homes and sees the solar shingles on its homes in The Heights as a potential avenue to producing onsite clean energy.

Zeroing in on net zero

Mike Robertson, a Habitat program manager working on the project, said the organization worked with teams from the Minneapolis-based Center for Energy and Environment on energy modeling.

“The Heights is the first time that we’ve dived into doing an all-electric at scale,” Roberston said. “We have confidence that these houses will perform how they were modeled.”

Habitat plans to build the development to meet the Zero Energy Ready Home Program standards developed by the U.S. Department of Energy. Habitat will use Xcel Energy’s utility rebate and efficiency programs to achieve the highest efficiency and go above and beyond Habitat’s typical home standards.

The improved construction only adds a few thousand dollars to the overall costs and unlocks federal government incentives to help pay for upgrades, he said.

The nonprofit will receive free or reduced-cost products from Andersen Windows & Doors and other manufacturers. GAF Energy LLC, a solar roofing company, will donate solar shingles for over 40 homes and roofing materials. On-site solar will help bring down energy bills for homeowners, he said.

Chad Dipman, Habitat land development director, said the solar shingles should cover between half and 60% of the electricity the homes need. Habitat plans to use Xcel Energy incentive programs to help pay for additional solar shingles needed beyond those donated. 

Habitat will install electric resistance heating technology into air handlers to serve as backup heat for extremely cold days. Dipman said that the air source heat pumps will also provide air conditioning, a feature not available in most Habitat properties in Minnesota.  

Phil Anderson, new homes manager at the Center for Energy and Environment, has worked with Habitat on the project. He said the key to reducing the cost of heating and cooling electric homes is a well-insulated, tight envelope and high-performance windows. Habitat will build on its experience with constructing tight homes over the past decade, he said.

“Overall, the houses that we’ve been part of over the last almost ten years have been very tight homes,” Anderson said. “There’s just not a lot of air escaping.”

Habitat’s national office selected The Heights as this year’s Jimmy & Rosalynn Carter Work Project, named after the former president and his wife, two of Habitat’s most famous supporters. The work project begins September 29^th and will receive as visitors Garth Brooks and Trisha Yearwood, who now host the Carters’ program.

Robertson said thousands of volunteers from around the country and the world will help put up the homes. The Heights project “raises a lot of awareness for Habitat and specifically for this development and the decarbonization efforts that we’re putting into it,” he said.

The Heights’s two other housing developers continue raising capital for their projects and hope to break ground by next summer. Habitat believes the project will meet its 2030 completion deadline.

A St. Paul, Minnesota Habitat for Humanity project will offer affordable housing without fossil fuels is an article from Energy News Network, a nonprofit news service covering the clean energy transition. If you would like to support us please make a donation.

The small southeastern Minnesota city of La Crescent receives just a handful of permit applications each year to install solar panels on homes.

Despite the small volume, it’s still important to city sustainability coordinator Jason Ludwigson that it’s a smooth process for homeowners and installers.

That’s why the city of 5,000 recently became one of the first in the state to start using a software program designed to streamline local solar permitting.

Solar Automated Permitting Plus, or SolarAPP+, was developed by the National Renewable Energy Laboratory (NREL) in collaboration with the solar industry, code organizations, local governments, and the building safety community. Since its release in 2018, SolarAPP+ has been used by more than 160 cities and counties to automate much of the permitting process for smaller solar installations.

In La Crescent, an application that might have taken a few days for a city employee to review can now be approved online in minutes for projects that meet criteria. That “will save (time) for both the contractor and the city,” Ludwigson said. “It makes it faster for our building and zoning department.”  

Minnesota lawmakers want to encourage more communities to join La Crescent in adopting the software. This year, the Legislature budgeted $2 million for the Commerce Department to deliver programs and training to local agencies, contractors, inspectors and others involved in solar permitting.

The state’s solar industry association supports use of the software, in part for its potential to standardize a process that can right now vary significantly from city to city. Making it easier to permit installations could save companies time, potentially lowering costs and helping to expand rooftop solar in the state, which will need many megawatts more clean energy to reach its climate goals.

Getting permits for solar projects in Minnesota can take days or weeks and cost as much as $1,000. Typically, solar installers in the state apply electronically or in person for separate building, local electrical and utility interconnection permits. After receiving approvals for all three applications — and any other that are required — they start building projects that, once completed, are reviewed onsite by building and electrical inspectors.

Installers using the software receive automated approvals if they accurately complete forms for their building and electrical permits and, if required, fire and structural permits. Any errors are flagged and sent back to the installer for corrections. The app integrates with existing permitting software programs used by government agencies, according to NREL.

California cities have been the biggest adopters so far, but the app is beginning to catch on in Minnesota, Wisconsin and Iowa. By the end of 2023, the NREL reported that the free software had been used nationally on 32,800 projects, saving 33,000 hours of permitting staff time. Installers pay a $25 administrative fee and the community’s permitting fee.

State Rep. Patty Acomb, who chairs the Climate and Energy Finance and Policy committee, said she and other lawmakers want to provide state grants so cities can learn how to use the software and eventually create a consistent permitting process across the state. “The intention is to make (permitting) easy and predictable,” she said.

Lissa Pawlisch, director of the Energy Development Section at the state Department of Commerce, said the department is developing a program to reach out to communities interested in SolarAPP+ and assist them in incorporating it into existing permitting software. She also believes the app could play a role in helping move installations through the new federally funded Solar for All program that will serve low income households. 

Great Plains Institute’s Brian Ross said that Solar for All requires a consistent approach to permitting, and that one way to achieve that is with the SolarApp+ software. The app would give a “jurisdictional consistency” to applications from low income solar customers and “to make sure there are not barriers in the way.” 

Despite its promise the app will not work in every situation. It only incorporates local versions of electrical permits and not the state permit, which many communities use. “If the local government relies on the state permitting process (for instance, Minneapolis), then I don’t think there is any advantage to using SolarAPP because the state electric permitting process is already effectively an ‘automatic issue,'” he said.

Donna Pickard of TruNorth Solar has spent decades filing solar permits with dozens of municipalities. She said installers need building, electrical and interconnection permits and approvals before projects begin, often taking over a month.

Pickard wonders if SolarAPP+ will interest Minnesota communities because many already have established permitting systems to manage solar projects. However, having dealt with many different permitting structures, Pickard said she “likes the idea of standardization because it would make things easier.”

Another challenge is that the software can’t evaluate permits for projects on flat or metal roofs in the Midwest. Jeff Cook, solar analysis subprogram manager at the NREL Strategic Energy Analysis Center in Colorado, said the software covers about 80% of eligible solar installations but the number declines in the Midwest due to “high snow load and metal roof penetration.”

Pawlisch said outreach and grants for SolarApp+ would likely start next year. The start date is also unclear for Solar for All as she continues to meet with federal and state officials to work out the details.

Software aims to help local governments standardize, streamline solar permitting  is an article from Energy News Network, a nonprofit news service covering the clean energy transition. If you would like to support us please make a donation.

The “solar-coaster” is about to get a little smoother for Minnesota solar installers.

State lawmakers this spring extended funding for a rooftop solar rebate program through 2035, bucking a trend of two-year renewals that caused uncertainty for installers every couple of years.

Solar industry leaders say the additional financial certainty will help companies invest in longer-term marketing and outreach, particularly for reaching lower-income customers.

Since 2014, Solar Rewards has helped more than 8,000 residential and small business customers pay for solar installations in Xcel Energy’s territory. The program is managed by the utility, but the legislature controls its budget, which has ranged between $5 million and $15 million annually. The money comes from yearly fees the state collects from Xcel in return for allowing it to store nuclear waste at two power plants.  

Logan O’Grady, executive director of the Minnesota Solar Energy Industries Association, said the extension represents a compromise — and a victory — after failed attempts to convince lawmakers to increase the program’s funding. Funding has rarely stayed the same two years in a row. Installers have struggled with planning because they did not know if the rebates would be renewed. 

“It creates the inability to plan for what you’ll be getting year to year,” O’Grady said. “You get through a two-year cycle, and then there might be nothing.”

Uncertainty about the rebate’s future has been challenging to communicate to customers. O’Grady said installers could not make promises in some years because they did not know if the program would continue. Now, even if funding runs out for the year, companies will be able to confidently tell customers that it will be available next year.

He said the extension also will help installers work with low- and moderate-income Solar Rewards customers. In 2023, the Legislature significantly modified Solar Rewards by allocating half the money for low-income participants while increasing subsidies for those projects.

Bobby King, Minnesota director of Solar United Neighbors, said connecting to organizations working with low-income households has taken a few years. The extension gives him the confidence to continue the work.

“You need the program to be consistent if you’re going to continue to grow a program to help folks get low-income solar,” he said. “We can be confident about bringing more resources to staff a (low-income) program.”

All Energy Solar CEO Michael Allen said the Solar Rewards extension “provides you a little bit more confidence” but “still doesn’t take away the real costs of having to market and to sell, design and build projects for this market segment.” He estimated that it can cost as much as 10 times more to recruit and sell to income-qualified customers because of the relationship building, education, financing and sometimes structural issues that need to be addressed.

The Solar Rewards budget over the 10-year extension will be a bit more than half of what the program received from 2014 to 2025. He worries the subsidies will slow rooftop solar, which needs to expand to meet the state’s climate goal of net zero emissions by 2050.

Martin Morud, CEO and owner of TruNorth Solar, said he prefers stable funding that allows his business time to develop relationships with community organizations that work with income-qualified customers. He said TruNorth Solar has worked on income-qualified projects involving food shelves and transitional and low-income housing through Solar Rewards and other programs. 

Cooperative Energy Futures had begun using Solar Rewards for residential projects over the past two years after primarily building community solar projects with many low- and moderate-income subscribers.

Pouya Najmaie, its policy and regulatory director, said the nonprofit recently hired an employee to focus on income-qualified projects. The Solar Rewards extension will help the nonprofit maintain that position and potentially add another if demand grows.

The Solar Rewards bill was part of a 1,430-page omnibus bill that Gov. Tim Walz signed into law in late May. Rep. Patty Acomb, House of Representatives Climate and Energy Finance and Policy Committee Chair, said lawmakers supporting Solar Rewards worried that the program could have ended in 2025 if the Democratic-dominated Legislature changed hands.

“Fifty million dollars, or $5 million a year, is better than zero,” she said. “I think that having programs like this is a signal to the industry that there is support from the state.”

Minnesota solar rebate extension gives installers longer runway to reach lower-income customers is an article from Energy News Network, a nonprofit news service covering the clean energy transition. If you would like to support us please make a donation.

Minnesota solar developers frustrated with the process of connecting projects to the electric grid will soon have a new place to turn to answer questions and resolve disputes.

State lawmakers recently passed legislation calling on the state Public Utilities Commission to hire an interconnection ombudsperson to provide clean energy companies with information, guidance, and mediation on connecting projects of 10 megawatts and less to the grid.

The legislation follows years of complaints by solar companies about disputes with utilities, Xcel Energy in particular, that have contributed to years-long delays for some projects to connect.

“We hope that we can create a role dedicated to understanding the entire interconnection process and help manage those disagreements when they arise,” said Logan O’Grady, executive director of the Minnesota Solar Energy Industries Association.

The legislation says the ombudsperson will track disputes and serve as a mediator between customers and investor-owned utilities. They will be expected to review policies, convene stakeholder groups, and assess ways to reduce conflicts.

O’Grady said customers, installers, and developers could contact the ombudsperson for assistance on issues involving rooftop, commercial, or community solar projects. 

The ombudsperson would not eliminate the state’s existing dispute process for interconnection issues, which can take over a month and require mediation if unresolved issues remain.

O’Grady said he hopes having an interconnection ombudsperson will more efficiently resolve some disputes and provide a new option for developers that haven’t wanted to deal with the time and attention required to file a formal complaint.  

Solar developers’ complaints have varied, but some involve inaccurate information leading to “weeks of back and forth to get clarity on a simple misunderstanding,” O’Grady said. The hope is that an ombudsperson with experience in the industry could more efficiently answer those questions or know who to contact in utilities to provide guidance. 

State Rep. Patty Acomb, a suburban Democrat and chair of Climate and Energy Finance and Policy committee, said the ombudsperson’s work is less likely to draw skepticism because it comes from an independent source.

Solar company leaders support the new position. Bobby King, Minnesota program director for Solar United Neighbors, said the ombudsperson could “centralize” information, advocate for interconnection, create solutions to improve the process and avoid litigation. “I think it’s a positive step in the right direction,” King said.

Michael Allen, CEO of All Energy Solar, said the ombudsperson would provide “unbiased information” to the Commerce Department, the Public Utilities Commission, installers, and utilities. He also believes an ombudsperson could reduce the number of disputes that reach the Public Utilities Commission.

Marty Morud, CEO and owner of TruNorth Solar, said he’d had few issues with Xcel but sees an ombudsperson as a source for helping move utilities to respond if installer emails and phone calls go unanswered.

More than a dozen states already have positions similar to interconnection ombudspersons, including California, Massachusetts and New York. Sky Stanfield, a lawyer who works with the Interstate Renewable Energy Council, said states approach the ombudsperson differently, not all requiring them to have the technical skills Minnesota seeks.

She said that having someone see all the disputes and detect patterns could also help the Public Utilities Commission target rulemaking in problem areas. 

“I do think having a person whose job is to stay up to date on what is happening seems to me like a positive step,” Stanfield said.

To be effective, the ombudsperson must be “empowered” by the Public Utilities Commission and accepted as an objective mediator by utilities and clean energy developers, she said.    

The Legislature created an initial $150,000 budget. The ombudsperson position, which has not been posted, is expected to be filled later this year.

Minnesota lawmakers hope ombudsperson can help defuse solar interconnection disputes is an article from Energy News Network, a nonprofit news service covering the clean energy transition. If you would like to support us please make a donation.

The operators of the decades-old energy systems that heat and cool buildings in downtown Minneapolis and St. Paul have ambitious plans underway to reduce emissions.

The mostly hidden networks of insulated pipes connected to centralized heating and cooling equipment are known as district energy systems. They’ve long been championed as an energy efficient way to heat and cool campuses or downtowns, especially in cooler climates.

Many, though, are connected to fossil fuel facilities, and the systems’ high efficiency alone won’t be enough to help schools, cities, and companies meet their goals of eliminating greenhouse gas emissions by midcentury or sooner. Climate pledges by these institutional customers are now driving efforts to repower district energy systems with clean energy.

University district energy systems began initiatives to reduce emissions years ago and “now in the last five years we’re seeing a lot of emphasis on this from cities and towns,” said Rob Thornton, president and CEO of the International District Energy Association. 

In Minneapolis, Cordia Energy, the private company that operates the largest downtown district energy system, is replacing natural gas boilers with electric models. And in downtown St. Paul, officials are seeking federal funding for a project to recover heat from a wastewater treatment plant and reduce energy use for a system currently powered by electricity and biomass.

“We’re doing decarbonization at the rate that our customer base is asking for and we can economically withstand,” said Jacob Graff, Cordia Energy’s north region president. Customers connected to its downtown Minneapolis system range from stadiums and high rises to apartments and medical facilities.

From ancient Rome to skyscrapers

The concept of district heating has been around for centuries, with its roots in the networks of hot water pipes built in ancient Rome. Some of the first modern steam-based systems were built in New York in the 1880s. Today, the United States has more than 700 district energy systems heating and cooling buildings in downtowns, universities, medical campuses, towns and communities.

Cordia Energy’s Minneapolis system opened in 1972 to serve the 57-story IDS Center, still the tallest building in Minneapolis. Today, the steam and chilled water system manages seven plants that heat and cool the IDS and more than 100 other buildings, including U.S. Bank Stadium, Target Center, and the convention center.

Hennepin County owns and operates a much smaller district energy system, connected to a downtown trash incinerator, that primarily serves county buildings and Minneapolis City Hall.

District Energy St. Paul began in the early 1980s after then-Mayor George Latimer hired Swedish engineer Hans Nyman to replace the aging steam system with a hot-water central heating system. Latimer wanted to create a national model of district energy and he largely succeeded. District Energy St. Paul has the largest hot water system in the country, with more than 200 buildings.

Together, the two systems serve some of the state’s biggest buildings, which have emerged as the largest source of greenhouse gas emissions in both cities. In Minneapolis, 65% of the emissions are from commercial, multifamily and industrial buildings. St. Paul’s data is similar.

Tapping clean electricity in Minneapolis

Cordia plans to reduce emissions from its Minneapolis system by 30% by 2030 before reaching net zero by 2050. Xcel Energy’s green tariff program will offset around half the electricity Cordia uses this year, and it wants to buy more credits if they become available.  

The company is replacing older engine-driven chillers with electric models at the former Dayton’s department store, where it has operations. Chillers modulate the temperature inside buildings and can be powered by electricity or natural gas. Geothermal is another potential solution being studied.

A potential geothermal project “hasn’t cleared the economic hurdles yet,” Graff said. “I think we’ll eventually get there.”

Minneapolis customers are not alone in seeking to reduce emissions from district energy systems, Graff said. San Francisco will be Cordia’s first system to decarbonize using hydropower from a dam the company owns in Yosemite National Park.

St. Paul looks to waste heat recovery

Downtown St. Paul’s district heating system is owned and operated by a company called District Energy, which recently worked with the city and the regional planning agency on a $152 million U.S. EPA grant application to tap heat from a regional wastewater plant for the city’s system. It would include a project with Xcel Energy to pay for an electric boiler and hot water storage. 

District Energy president and CEO Ken Smith said half the system already has been decarbonized through biomass, solar thermal and renewable energy credits. An analysis showed that recovering heat from the Metro Wastewater Treatment Plant, which manages 170 million gallons of water daily, could produce 60 megawatts of thermal energy, and heat pumps could lift the temperature up to the system average.

If District Energy receives the Climate Pollution Reduction Grant, the system would go live in 2028 and allow District Energy to provide 92% of energy from carbon-free or carbon-neutral sources, far ahead of its goal of net zero by 2050.

“This certainly would be able to accelerate that by 30 years,” Smith said. “From everything we’ve seen, there’s nothing like this, certainly not in the United States, and I don’t believe there’s anything like it at this scale in Canada, either.”

St. Paul Resilience Officer Russ Stark said District Energy’s emissions represent a small portion of the total greenhouse gases in the city. Still, around 50,000 tons of carbon would be eliminated annually, and that’s “very impactful,” he said.

The wastewater project would allow District Energy St. Paul to expand to more buildings, decarbonizing them in the process, Stark said. Adding clients “is not a simple process but we’ve been talking a lot about that being an exciting part of the project,” he said. “I don’t know how many major city downtowns there are where there’s an opportunity to largely decarbonize most of the downtown in the way that we can.”

Systems face unique, local challenges

A one-size-fits-all solution for decarbonizing district energy systems doesn’t exist, as most are unique based on customers and geography. Not all can be inexpensively retrofitted for electricity, and the ongoing office and commercial real estate fallout from the Covid-19 pandemic adds risk to financing projects.

Thornton, of the district energy association, said electricity pricing can escalate quickly, especially in summer, creating uncertainty in the market. New technology may require more space, different controls and significant staff training. Federal policy remains unclear about what parts of a district energy system would qualify for tax incentives, he said.

Graff ticks off many challenges in decarbonizing Cordia’s Minneapolis operations. Geothermal works well on campuses and in low-slung neighborhoods where the problem of sending steam to the 50th floor of a skyscraper does not exist, Graff said.

There’s not a simple clean power source like natural gas that has the energy density to create and push steam through a network, he said. To illustrate the point during a tour of Cordia’s downtown plant, he pointed to a pipe with a modest circumference and said the natural gas flowing through it provided the heating for much of the system.

Electrification may be a goal of heating and cooling, but offsetting it with clean power is daunting. Cordia would have to install heat pumps capable of drawing more than 400 megawatts from a clean energy source, which would be no small feat, Graff said.

Hydrogen sounds promising but has no track record yet for supplying an entire downtown district energy system, Graff said. Biomass has potential, too, but sourcing enough it to service a sprawling district energy system reliably remains difficult.

Battery storage, microgrids and other technologies could all play a role, but each brings issues ranging from cost to a lack of testing in a district energy environment, at least at the size of the downtown Minneapolis system.

“We have the economy of Minneapolis in our hands, and regional economics depend on downtown Minneapolis,” Graff said “We need a reliable infrastructure that people can count on that can be delivered economically, and it’s our responsibility to do that.”

In Twin Cities and beyond, district energy systems see pressure to cut carbon emissions is an article from Energy News Network, a nonprofit news service covering the clean energy transition. If you would like to support us please make a donation.