Solar Portfolio

NOTEWORTHY PROJECTS

First of its kind, largest in its area, and other notable projects.

  • Cottage Grove, WI; Wisconsin; Dane County; Renewable Energy; Photovoltaic; PV; Clean Energy; Solar

    Cottage Grove, WI

    Year Complete: 2023
    Size: 22MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw pile driving, assembled all major equipment, and completed all DC and AC wiring for this single axis tracker system.

    Other: This is the largest PV ground-mount in Dane County and contributed towards the County meeting their goal of powering 100% of their county facilities with renewable electricity.

  • Cedarburg, WI

    Cedarburg, WI

    Year Complete: 2024
    Size: 8.6MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw pile driving, assembled all major equipment, and completed all DC and AC wiring for this single axis tracker system.

  • Menomonee Falls, WI

    Menomonee Falls, WI

    Year Complete: 2021
    Size: 2.9MWdc
    Role: Installation Partner

    Equipment: Pieper assembled all major equipment for this ballasted, roof-mount system and completed all DC and AC wiring.

    Other: Largest PV roof-mount system in Wisconsin

GALLERY

  • University of Wisconsin; UW; UW Madison; Solar; Solar PV; Photovoltaic; Sustainability; Renewable Energy

    UW Madison - Computer, Data, & Information Sciences (CDIS)

    Year Complete: 2025
    Size: 162kWdc
    Role: Electrical Subcontractor - New Construction

    Equipment: Pieper was hired by Findorff to complete all electrical construction, lighting, and solar for the newly constructed UW CDIS building in Madison. The project consists of 3 arrays: two ballasted and one 7-story-high rooftop trellis.

  • Aerial view of a farm building with solar panels in the foreground and fields in the background.

    Charter Next Generation

    Year Complete: 2025
    Size: 139kWdc
    Role: Electrical Subcontractor - New Construction

    Equipment: Pieper was hired by the GC to complete all electrical construction, lighting, and solar for the newly constructed Charter Next Generation facility in Milton. The project consists of a fixed tilt ground mount array and CPS string inverter.

  • Solar; Solar PV; Photovoltaic; Sustainability; Renewable Energy

    Hartland, WI

    Year Complete: 2025
    Size: 238kWdc
    Role: Self-Developed and Installed

    Equipment: Pieper developed this project to offset a portion of this health clinic’s electrical consumption. We designed, engineered, permitted and constructed this ballasted, roof-mount system, as well as applied for the Focus on Energy rebate on the customer’s behalf.

  • Aerial view of a large solar panel farm in a rural area with fields and green trees around.

    Caledonia, WI

    Year Complete: 2025
    Size: 6.8MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw civil engineering, fencing, SWPPP, and pile driving; assembled all major equipment; and completed all DC and AC wiring for this single axis tracker system.

  • Aerial view of Aurora Health Center with solar panels on the roof, surrounded by residential and commercial buildings, under a partly cloudy sky.

    West Allis, WI

    Year Complete: 2025
    Size: 190kWdc
    Role: Self-Developed and Installed

    Equipment: Pieper developed this project to offset a portion of this health clinic’s electrical consumption. We designed, engineered, permitted and constructed this ballasted, roof-mount system, as well as applied for the Focus on Energy rebate on the customer’s behalf.

  • A large solar panel farm with rows of solar panels on a farmland, some being installed, surrounded by fields and trees.

    Elkhorn, WI

    Year Complete: 2025
    Size: 6.8MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw civil engineering, fencing, SWPPP, and pile driving; assembled all major equipment; and completed all DC and AC wiring for this single axis tracker system.

  • Aerial view of Aurora Health Center building with solar panels on the roof, surrounded by parking lot and nearby roads, residential neighborhood, and open fields in the background.

    Greenfield, WI

    Year Complete: 2025
    Size: 152kWdc
    Role: Self-Developed and Installed

    Equipment: Pieper developed this project to offset a portion of this health clinic’s electrical consumption. We designed, engineered, permitted and constructed this ballasted, roof-mount system, as well as applied for the Focus on Energy rebate on the customer’s behalf.

  • Aerial view of a large solar farm with multiple rows of solar panels in a rural area.

    Franksville, WI

    Year Complete: 2025
    Size: 6.8MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw civil engineering, fencing, SWPPP, and pile driving; assembled all major equipment; and completed all DC and AC wiring for this single axis tracker system.

  • Aerial view of a medical center with parking lots, solar panels on the roof, and a wooded area in the background.

    Kenosha, WI

    Year Complete: 2025
    Size: 97kWdc
    Role: Self-Developed and Installed

    Equipment: Pieper developed this project to offset a portion of this health clinic’s electrical consumption. We designed, engineered, permitted and constructed this ballasted, roof-mount system, as well as applied for the Focus on Energy rebate on the customer’s behalf.

  • Aerial view of a modern medical office building with a parking lot, surrounded by residential buildings, green spaces, a pond, and a highway in the background.

    Madison Pediatric Dental

    Year Complete: 2024
    Size: 48kWdc
    Role: Electrical Subcontractor - New Construction

    Equipment: Pieper was hired by Ideal Builders to complete all electrical construction, lighting, and solar for the newly constructed Madison Pediatric Dental clinic in Monona. It utilizes non-penetrating ballasted racking and SolarEdge inverters with DC optimizers.

  • New Berlin, WI; Waukesha County; Photovoltaic; Renewable Energy; Solar Energy

    ABB

    Year Complete: 2024
    Size: 332kWdc
    Role: Electrical Subcontractor - New Construction

    Equipment: The project was designed to help ABB achieve their green energy goals and obtain LEED Building Certification. The PV system was completed in conjunction with full scale electrical construction on this new construction project in New Berlin.

  • Field of solar panels with two workers installing or maintaining them, trees in the background, clear blue sky, and sunny weather.

    Cottage Grove, WI

    Year Complete: 2024
    Size: 357kWdc
    Role: Installation Partner

    Equipment: Pieper worked in partnership with a developer to complete this ground mount array. We oversaw the foundation installation, assembled all major equipment, including over 655 solar modules and 5 inverters, and completed all DC and AC wiring.

  • Mt. Pleasant, WI

    Mt. Pleasant, WI

    Year Complete: 2023
    Size: 115kWdc
    Role: Self-Developed and Installed

    Equipment: Pieper developed this project to offset a portion of this health clinic’s electrical consumption. We designed, engineered, permitted and constructed this ballasted, roof-mount system, as well as applied for the Focus on Energy rebate on the customer’s behalf.

  • Waukesha, WI

    Waukesha, WI

    Year Complete: 2023
    Size: 54kWdc
    Role: Self-Developed and Installed

    Equipment: Equipment: Pieper developed this project to offset a portion of this health clinic’s electrical consumption. We designed, engineered, permitted and constructed this ballasted, roof-mount system, as well as applied for the Focus on Energy rebate on the customer’s behalf.

  • Madison, WI

    Madison, WI

    Year Complete: 2023
    Size: 100kWdc
    Role: Self-Developed and Installed

    Equipment: Pieper added to an existing PV array and sized it to fall within MG&E’s net metering limit. We assembled all major equipment for this ballasted, roof-mount system and completed all DC and AC wiring. We also applied for the Focus on Energy rebate on the customer’s behalf.

  • Fitchburg, WI; Wisconsin; Dane County; Renewable Energy; Photovoltaic; PV; Clean Energy; Solar

    Fitchburg, WI

    Year Complete: 2023
    Size: 134kWdc
    Role: Installation Partner

    Equipment: Pieper worked in partnership with a developer to complete this fixed tilt ground mount array. We oversaw pile driving, assembled all major equipment, and completed all DC and AC wiring for this fixed-tilt ground mount system.

  • Solar panels installed on a rooftop with a worker in the background.

    Clinton, WI

    Year Complete: 2023
    Size: 155kWdc
    Role: Installation Partner

    Equipment: Pieper worked in partnership with a developer to complete this 10 degree tilt, ballasted roof mount array. We assembled all major equipment, including over 280 solar modules and 1 SolarEdge inverter, and completed all DC and AC wiring.

  • Milwaukee, WI; Wisconsin; Milwaukee County; Renewable Energy; Photovoltaic; PV; Clean Energy; Solar

    Milwaukee, WI

    Year Complete: 2023
    Size: 1MWdc
    Role: Installation Partner

    Equipment: Pieper worked in partnership with a developer to complete this 10 degree tilt, ballasted roof mount array. We assembled all major equipment, including over 2,500 solar modules, and completed all DC and AC wiring.

  • Dodgeville, WI

    Dodgeville, WI

    Year Complete: 2022
    Size: 371kWdc
    Role: Installation Partner

    Equipment: Pieper worked in partnership with a developer to complete this 10 degree tilt, ballasted roof mount array. We assembled all major equipment, including a robust data acquisition system (DAS), and completed all DC and AC wiring.

  • Beloit, WI

    Beloit, WI

    Year Complete: 2021
    Size: 5.91MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw pile driving, assembled all major equipment, and completed all DC and AC wiring for this single axis tracking system, which was one of the first of its kind of this size in the state

  • Racine, WI

    Racine, WI

    Year Complete: 2021
    Size: 1.88MWdc
    Role: Installation Partner

    Equipment: Pieper assembled all major equipment for this ballasted, roof-mount system and completed all DC and AC wiring.

  • Pewaukee, WI

    Pewaukee, WI

    Year Complete: 2021
    Size: 2.85MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw pile driving, assembled all major equipment, and completed all DC and AC wiring for this fixed-tilt ground mount system.

  • Cudahy, WI

    Cudahy, WI

    Year Complete: 2020
    Size: 2.85MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw pile driving, assembled all major equipment, and completed all DC and AC wiring for this fixed-tilt ground mount system.

  • Milwaukee, WI

    Milwaukee, WI

    Year Complete: 2020
    Size: 2.8MWdc
    Role: Installation Partner

    Equipment: Pieper oversaw raking assembly, installed all major equipment, and completed all DC and AC wiring for this fixed-tilt, ballasted ground mount system.

    Other: This non-penetrating ground mount system was placed on one of Milwaukee’s landfills.

  • Port Washington, WI

    Port Washington, WI

    Year Complete: 2020
    Size: 257Wdc
    Role: Installation Partner

    Equipment: Pieper assembled all major equipment for this ballasted, roof-mount system and completed all DC and AC wiring.

  • Madison, WI 2.2MWdc

    Madison, WI

    Year Complete: 2018
    Size: 2.2MWdc
    Role: Installation Partner

    Equipment: Pieper assembled all major equipment for this ballasted, roof-mount system and completed all DC and AC wiring.

    Other: Formerly largest PV roof-mount system in Wisconsin. Three different racking styles installed, including ballasted, flush-mount, and east/west oriented.

OPERATIONS & MAINTENANCE

  • Milwaukee, WI

    Milwaukee, WI

    Year Array Installed: 2012
    Role: O&M

    Equipment: Pieper inspected and reported on components in various sections of this ballasted, tracking ground mount array. Damaged components were decommissioned and salvageable components were reconfigured to mitigate future environmental damage.

  • Mequon, WI; Wisconsin; Racine County; Renewable Energy; Photovoltaic; PV; Clean Energy; Solar

    Mequon, WI

    Year Array Installed: 2012
    Role: O&M

    Equipment: Pieper called upon to troubleshoot and repair failed inverter in ground mount installation

  • Oak Creek, WI; Racine County; Photovoltaic; Renewable Energy; Solar Energy

    Oak Creek, WI

    Year Array Installed: 2014
    Role: O&M

    Equipment: Pieper performed general maintenance on the rooftop and ground arrays, including inspection of modules, racking, DC wiring, grounding, and inverters. Failed inverters were replaced and comprehensive diagnostic testing was performed on the tracker components.

  • Close-up of solar panels installed outdoors with trees and a blue sky with some clouds in the background.

    Mequon, WI

    Year Array Installed: 2016
    Role: O&M

    Equipment: Pieper performed general maintenance on the stationary and tracking ground arrays. Recommendations given for identified areas of concern.

  • preventative maintenance; solar; photovoltaic; PV

    Milwaukee, WI

    Year Array Installed: 2020
    Role: O&M

    Equipment: Pieper provides ongoing Preventative Maintenance services for this 1MW ballasted array.

  • Cedarburg, WI

    Cedarburg, WI

    Year Array Installed: 2021
    Role: O&M

    Equipment: Pieper called upon to troubleshoot and repair failed inverter

  • Mt. Pleasant, WI

    Mt. Pleasant, WI

    Year Array Installed: 2021
    Role: O&M

    Equipment: Pieper called upon to troubleshoot and repair failed inverter

Locations Where We’ve Worked