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.