By the end of 2025, Sun Vault Roofing is on track to complete seven solar shingle projects across Wisconsin, totaling roughly 62 kW (equivalent to planting about 1,400 trees). Project sites are in Madison (2), Wauwatosa, Evansville, Sheboygan, Oconomowoc, and Cambridge.
Together, they represent the first fully integrated CertainTeed Solstice solar shingle roofs in Wisconsin. They’re also the first true building integrated photovoltaic (BIPV) solar roofs of any kind in Madison or Dane County.
Each installation begins with an ice-and-water shield underlayment, followed by the solar shingle array with perimeter flashing. Asphalt shingles are then installed around the array. Every solar shingle is screwed directly into the roof decking, and each fastener is fully covered by the next course of shingles—just like a traditional shingle roof. This creates a continuous, watertight surface that blends seamlessly with the rest of the roof. Because all fasteners are covered by overlapping shingles, solar shingle systems eliminate exposed penetrations and don’t rely on sealants, gaskets, or specialty flashings for long-term waterproofing. Roof leaks from conventional solar installations are already rare, but for those concerned about penetrations, this system provides a truly penetration-free, watertight solution.
The products Sun Vault Roofing offers also lessens the chance that pests will bother your array. Unless what is called ‘critter guard’ is installed, traditional solar arrays can end up attracting squirrels or other animals that can chew wiring.
Mike Mannion, Sun Vault Roofing co-owner and Director of Operations, was recently recognized by Clean Jobs Midwest for helping popularize solar shingle technology in Wisconsin and installing the first of these projects. Read more about the feature here.
2025 LSC Annual MeetingDecember 5, 2025 - 1:09 am
A Warm Welcome to Our Newest Member: Sun Vault RoofingDecember 2, 2025 - 12:18 am
DC Everest Metropolitan School District Admin Building
/in UncategorizedLOCATION: Weston, Wisconsin | CAPACITY: 97.4KW | COMPLETION DATE: December 2025
SOLAR CONTRACTOR:
In 2025, Legacy Solar Co-op worked with Olson Solar Energy to install a 97.4kW rooftop solar array at DC Everest Metropolitan School District Admin Building in Weston, WI. The array is estimated to offset about 36% of the building’s electricity annually. Read more
2025 LSC Annual Meeting
/in EventsCome celebrate 11 years with us and help us approve board members both new and old for the coming year.
Date/Time: Monday, December 15, 2025
Location:
Goodman Community Center, Brassworks Building, 206 Waubesa St, Madison, WI. We are meeting in the Lau Christensen Room.
Read more
A Warm Welcome to Our Newest Member: Sun Vault Roofing
/in Member Installers, NewsTogether, they represent the first fully integrated CertainTeed Solstice solar shingle roofs in Wisconsin. They’re also the first true building integrated photovoltaic (BIPV) solar roofs of any kind in Madison or Dane County.
Each installation begins with an ice-and-water shield underlayment, followed by the solar shingle array with perimeter flashing. Asphalt shingles are then installed around the array. Every solar shingle is screwed directly into the roof decking, and each fastener is fully covered by the next course of shingles—just like a traditional shingle roof. This creates a continuous, watertight surface that blends seamlessly with the rest of the roof. Because all fasteners are covered by overlapping shingles, solar shingle systems eliminate exposed penetrations and don’t rely on sealants, gaskets, or specialty flashings for long-term waterproofing. Roof leaks from conventional solar installations are already rare, but for those concerned about penetrations, this system provides a truly penetration-free, watertight solution.
The products Sun Vault Roofing offers also lessens the chance that pests will bother your array. Unless what is called ‘critter guard’ is installed, traditional solar arrays can end up attracting squirrels or other animals that can chew wiring.
Mike Mannion, Sun Vault Roofing co-owner and Director of Operations, was recently recognized by Clean Jobs Midwest for helping popularize solar shingle technology in Wisconsin and installing the first of these projects. Read more about the feature here.
Member Spotlight: All Energy Solar
/in Member InstallersAll Energy Solar is a family-owned solar installer based in St. Paul, Minnesota with a local office in Madison. Since 2009, their team of 230+ employees have installed over 11,000 solar projects across the US, totaling over 100 MW. In 2024, All Energy Solar won the Madison.com People’s Choice Award in the solar energy industry. Legacy Solar Co-op is proud to call All Energy Solar a member. To learn a bit more about them, check out the brief interview below!
What solar installation services do you provide?
Roof Mounts, Ground Mounts, Carports / Solar Pergolas, Installation Kits, EV Chargers, Batteries, We also provide customized energy monitoring.
Please describe your service area.
Full turnkey design and installation of rooftop, ground mount and carport canopy solar systems, as well as commercial energy storage system design and installation, Level-2 EV charger installations and customized energy monitoring.
Please tell us which types of customers you work with.
Small commercial (Under 100kW), Mid-sized commercial (Between 100-300kW), Large commercial (over 300kW), Small nonprofit (Under 40kW), Mid-sized nonprofits (Between 40-100kW), Large nonprofits (Over 100kW), Residential
Read more
Antigo Wastewater Treatment Plant
/in Projects, UncategorizedLOCATION: Antigo, Wisconsin | CAPACITY: 352KW | COMPLETION DATE: April 2025
SOLAR CONTRACTOR: Northwind Solar
In 2025, Legacy Solar Co-op worked with Northwind Solar to install a 352kW solar array at the wastewater treatment plant in Antigo, WI. The array is estimated to offset about 31% of their electricity annually.
Gallery
Solar Consulting
Make your solar vision a reality with expert help. At Legacy Solar Co-op, we specialize in supporting organizations and businesses through every step of the solar installation process, ensuring that your project is successful and sustainable. From research to financing, we’ve got you covered. We dedicated to helping you make informed choices about solar energy, connecting you with reliable vendors, and exploring funding opportunities to make your project affordable. Learn more about our solar consulting services today.
Slice of Sun Solar Bonds
Legacy Solar Co-op sells Slice-of-Sun Solar Bonds to any member who would like to support a Solar Legacy project like this one, and earn interest on their bonds purchased through the co-op. Ready to get involved?
General Beer Northeast, Inc.
/in Projects*Commercial LSC Member
LOCATION: Kaukauna, Wisconsin
CAPACITY: 298.8 kW
COMPLETION DATE: October 2017
SOLAR CONTRACTOR:
General Beverage Companies (GB) is one of the largest wholesale distributors of wine, distilled spirits, beer and non-alcoholic beverages in Wisconsin.
General Beer Northeast is consolidating operations in Northeastern WI with a focus on sustainability and efficiency. A new 300kW solar array on its Fox Cities office will offset nearly 50% of its electricity use, reducing costs and supporting peak demand management. The system, covering the warehouse roof in Kaukauna, WI, will help preserve unpasteurized beverages while cutting energy expenses.
The company prioritizes fair wages, union contracts, and responsible construction practices, distinguishing itself as the only Wisconsin beverage wholesaler honoring union agreements. With Focus on Energy assistance, the payback period for the solar project is expected to drop from 11 to 7.5 years. Despite financial challenges, including eminent domain impacts, General Beer remains committed to long-term sustainability and operational savings.
The 298.9 kW solar installation will operate for 25+ years, using 100% of its energy on-site. No facility changes are needed, and efficiency upgrades will further reduce demand. Generating over 350,000 kWh annually, it will save the company $21,000+ per year.
Humane Society of Burnett County
/in ProjectsLOCATION: Webster, Wisconsin | CAPACITY: 19.72 kW | COMPLETED: November 2018
SOLAR CONTRACTOR:
Since 2000, the Humane Society of Burnett County(HSBC)’s mission has been to “provide a safe haven for stray or unwanted animals, to foster the human-animal bond, to promote responsible pet ownership and to end pet overpopulation through spay/neuter” in Burnett County. With the help of an $8,000 grant through Renew Wisconsin (secured by Legacy Solar Co-op), they installed a 19-kilowatt solar array at their new shelter and education center, offsetting over 50% of their electricity costs and saving an average of $5,600 annually.
Member Spotlight: InWave Renewables
/in Member Installers, NewsBased in Illinois, InWave Renewables is dedicated to making sustainable energy accessible to all. Its co-founders, Asfandyar “AK” Khan and Mohammad Najjar, have a diverse history in power and construction prior to starting InWave. This is an interview with Mohammad Najjar.
Tell us a little about your company and how it began. What were the motivations to start your company?
Growing up in places where energy was often unreliable — or entirely inaccessible — sustainable power was more than a challenge; it felt like a distant dream. […] Over the years, as we’ve worked in the renewable energy and construction sectors, one truth became undeniable: Energy is far more than just a resource, it is the foundation for resilience, opportunity, and growth. InWave was born out of this realization with a vision to make sustainable energy accessible to all.
What do you customers appreciate most about your current and past work?
One of our core values is to stay objective and prioritize the client’s vision. We approach every project through this lens, carefully considering each aspect to help our clients achieve their goals. This commitment is reflected in our work and is often what our clients appreciate most.
What has been your experience with supply chain issues over the past year or few years?
Read more
2024 LSC Annual Meeting
/in EventsDate/Time: Thursday, December 12th, 2024
Location: Goodman Center, 149 Waubesa Street (Ironworks Building), Madison, WI 53704, Evjue Room
Regardless of your status as an Annual Member, a Lifetime Member, as a representative of an Institution Member, or even just curious about becoming a member of our cooperative, you are invited to attend and participate in the review of our work in solar since our last member meeting this past December and what lies ahead for us in 2025.
View our 2024 Annual Report and a copy of the Annual Meeting Slides.
Read more
Member Spotlight: All Sky Energy
/in Member Installers, NewsBased in Baraboo, WI, All Sky Energy has over 20 years of experience in residential and commercial solar sectors, offering the grid-connected, off-grid and battery back-up systems. They joined the co-op in 2019.
We interviewed Lisa Kahlow, who, together with her husband, Keith Kahlow, owns All Sky Energy, to get an in-depth look at their dedication to renewable energy and their customers in the communities they serve.
Tell us a little about your company and how it began. What were the motivations to start your company?
Keith has worked in the electrical field, both in residential and commercial settings, since high school for small shops and also for the union for many years. Keith has over 30 years of experience, has been a Master Electrician for 15 years and continues to stay up to date on the ever-changing codes and industry. In 2010 he made the decision to go out on his own and we started All Sky Energy together. He saw an emerging industry and wanted to have firsthand experience with his clients and seeing projects from start to finish. I worked for my parents and decided in 2013 that I needed to go full time with our solar business. Read more