Bywatts

Solar Companies in Wisconsin

Bywatts lists 40 solar companies in Wisconsin.

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View Wisconsin on the map

Top cities: Milwaukee (7) · Madison (7) · Eau Claire (4) · New Berlin (3) · Menomonee Falls (3) · Wrightstown (2)

Companies by category
Wisconsin solar companies by categoryDesign & Engineering29Manufacturers27Installers & Field Serv…Installers & Field Services24EPC Firms (Engineering,…EPC Firms (Engineering, Procurement, Construction)22Operations & Maintenance19Generation Systems18System Integrators16Energy Consultants14

How much hail and wind Wisconsin solar sees

If your company owns or insures solar in Wisconsin, lightning is the weather peril most likely to damage the panels, and Columbia County carries the highest exposure of the 72 rated counties.

See how much hail your panels can take across Wisconsin counties

Source: FEMA National Risk Index, modeled by Bywatts. Full county ranking and methodology at the link.

All 40 companies in Wisconsin

CompanyCityWebsite
ABC Supply Co. Inc.BeloitVisit site
Generac Power Systems Inc.WaukeshaVisit site
HellermannTyton North AmericaMilwaukeeVisit site
Langan Engineering & Environmental Services·Visit site
RESA Power·Visit site
Rockwell AutomationMilwaukeeVisit site
Advanced IonicsMilwaukeeVisit site
Aqua Finance, Inc.WausauVisit site
BIOFermMadisonVisit site
Electrical Energy Experts, LLCGermantownVisit site
ERA Structural EngineeringEau ClaireVisit site
EZ-CRETE LLCEast TroyVisit site
FindorffMadisonVisit site
Franklin EnergyPort WashingtonVisit site
FTIMenashaVisit site
GSI Geo-Synthetics Systems LLCWaukeshaVisit site
Iconicx ServicesFranklinVisit site
JP CullenJanesvilleVisit site
Kohler Co.KohlerVisit site
Lakehead Constructors, Inc.SuperiorVisit site
Marking Services IncorporatedMilwaukeeVisit site
Marquis Solar FrameworksStoughtonVisit site
MatenaerWest BendVisit site
Mead & HuntMiddletonVisit site
MEYER BORGMAN JOHNSONGreen BayVisit site
Michels CorporationBrownsvilleVisit site
Milwaukee ToolBrookfieldVisit site
MP Systems Inc.East TroyVisit site
Partner Engineering & Science, Inc.Elm GroveVisit site
Pieper Electric, Inc.New BerlinVisit site
PPC Partners Inc.New BerlinVisit site
Shawllar EnergyMilwaukeeVisit site
Tenere Inc.DresserVisit site
The Jamar CompanyEau ClaireVisit site
Unico LLCFranksvilleVisit site
Valdes Architecture & EngineeringMilwaukeeVisit site
Wescom IncAshlandVisit site
TBP ConvertingFranklinVisit site
GPRSAppletonVisit site
Brown Dog GadgetsMenomonee FallsVisit site

Wisconsin at a glance

Wisconsin has 141 operating power plants (16.2 GW, led by Coal), 280 named substations, 5 data centers, 102 solar installers and 40 solar companies on Bywatts; retail electricity sales were 70.2 TWh in 2025 (EIA), up 2.2% over ten years.