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Winona Renewable Energy LLC

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LAST UPDATED: April 28th, 2021

Winona Renewable Energy is a full service solar contractor that is based in Winona, Minnesota and serves Minnesota and Wisconsin. Founded in 2010, Winona Renewable Energy is well-established in the solar industry where many companies are relatively new. This industry experience helps it stand out from other small solar firms. 

The company is full service which means that it handles solar projects from site survey to design to project management of the installation. Unlike some small solar companies, Winona Renewable Energy can work on solar PV projects for residential, commercial, non-profit, and government customers.

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The Good

  • NABCEP Certified
  • Ballpark Estimator
  • Established with Years of Experience
  • Good Reviews

NABCEP Certified

Winona Renewable Energy employs PV installation professionals that have been certified by the North American Board of Certified Energy Practitioners® (NABCEP®). NABCEP is the most well-established certification organization for professionals in the renewable energy field.

It offers a variety of certifications but Winona Renewable Energy is specifically certified as a PV Installation Professional.

NABCEP Board Certifications are earned by demonstrating your training, experience, and passing a rigorous exam so this certification can provide some extra confidence in Winona Renewable Energy’s installation expertise.

Ballpark Estimator

One frustrating part of purchasing a solar power system is that you may not have any idea of the cost before setting up an appointment to meet with a company.

Winona Renewable Energy has an estimator on its website that can give customers a ballpark figure on how much a system would cost to install at their property. 

Established with Years of Experience

Many solar panel companies are new. The nature of the industry has meant that many new companies have started overnight, with varying degrees of expertise, to take advantage of the current boom in solar energy demand due to federal investment tax credits and other reasons.

Winona Renewable Energy has over 11 years experience in solar system design and installation. 

Good Reviews

Winona Energy Systems doesn’t have many online reviews, but most are stellar. Customers expressed that the company is professional and honest. Many customers said it was the best value they found in the area for a solar system. 


The Bad

  • 5-Year Workmanship Warranty
  • No Information on Installed Brands
  • No Active Customer Reviews

5-Year Workmanship Warranty

Most solar companies offer some kind of warranty on their work. Winona Renewable Energy gives its customers a 5-year warranty on its workmanship which is good.

However, there are now many larger solar companies that offer a 10-year warranty on their work. This longer warranty could make it worth looking at other solar companies. 

No Information on Installed Brands

Most solar companies provide information about the brands that they work with or install. For example, what brand solar panel and inverter they prefer. There is no information on the brands this company works with on its website. 

No Recent Customer Reviews

Winona Renewable Energy’s online presence including its customer reviews are all a few years old. This lack of activity in recent years could be of concern. 


The Bottom Line

Based in Minnesota, Winona Renewable Energy is a smaller solar company that services both Minnesota and Wisconsin. We like that it is well-established and has been working in the field for over 11 years. Many solar companies are much newer and have less expertise.

It is also great that Winona Renewable Energy will work with residential properties as well as commercial, non-profit, and government entities. 

While the company has years of experience, we did not find many recent customer reviews or information on basic brand it installs. Customers should request references from recent projects. 

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