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Full Spectrum Solar

4.4 42 reviews Solar installer in Madison, WI
  • Installing since 2002
  • 1 area served

What Full Spectrum Solar customers say

4.4

42 reviews

Eric Zitske

Reviewed on Sep 2, 2026

We've been very happy with the Full Spectrum team for almost 10 years now. From our initial emails, we had all of our questions answered patiently and clearly. Our installation was excellent and all billing was transparent. Our gear has run flawlessly since 2017 and we wouldn't change a thing. During the hail storms of the spring of 2026, our solar panels survived unscathed and we had zero issues. We recently had our solar system removed to install a new metal roof, then reinstalled with a new fastening system. And again, the Full Spectrum team has been solid throughout the process. There is simply no one we would trust more with solar than Full Spectrum; they have our full confidence and thanks!

Robert Dixon

Reviewed on Jul 30, 2026

Hi everyone. I can't say enough about Ron and his team. From start to finish. Absolutely spit on. I've been in construction all my life. I'd hire them anytime. My electricity and gas bill are 40$ to 70$. And I like my house cool. This is almost August 2026. Completely satisfied, especially when friends are crying about there 3 to 400$ bill.

Sarah Fiske

Reviewed on Jun 30, 2026

Full Spectrum Solar has done an AMAZING job of keeping their many customers informed and up to date following the major hail storm in April 2026. Ron answered all of my questions promptly, and the workers who came to the house were professional, polite and efficient in their work. I assumed my system would be down for many weeks with all the repairs it needed, but the full down time was only 10 days to accommodate for the roofing and siding work that had to happen before the re-install.

Sandy Ennis

Reviewed on Jun 21, 2026

Highly recommend! My only complaint is that my roof is too small for all the panels I wanted 😁 Ron was great from the first call and the install crew was clean, fast and respectful even when it was super hot on my roof. Looking forward to many years of solar for my family!

Mary Ann Phalen

Reviewed on May 24, 2026

Our solar electric installation was beautifully designed and placed by skilled employees of Full Spectrum. We were told the install would be delayed at least a month due to recent hailstorm damage and the need to remove systems to repair or replace roofs. Their existing customers clearly were serviced. When they had a cancellation they were able to do our install. Nice men to work with throughout the process.

Dan

Reviewed on Jan 21, 2026

Amazing experience

We worked with Full Spectrum to install solar through the MadiSUN Group Buy program. We signed in July 2025 and, despite challenging winter weather, the project was completed by December 2025; an impressive feat given their busy season. Deiter, our Project Manager, was exceptional: thorough, patient with questions, and consistently responsive. He walked us through multiple design options and kept me informed about any scheduling changes. Eric and his electricians expertly handled our electrical service upgrade, dealt with our old house's electrical complexities, and seamlessly added an EV charger during the project. Their pricing was competitive with four other quotes (local and national), but Deiter's knowledge and the company's strong local reputation made the difference. My instinct that they'd do the job right proved correct: they delivered quality work with excellent communication throughout.

mrolli

Reviewed on Mar 17, 2016

Very happy with our installation

We had a home installation that went very smoothly. Mike from Full Spectrum assisted us with applying for tax credits and in our hookup with the local power company. Things were seamless and we are currently up and fully functional. Staff was friendly and efficient and costs were as predicted. We are very happy with the results so far. Installation was in late December so we are about 3 months out.

Shaun Lopez-Murphy

Reviewed on Oct 21, 2015

Solar on the Farm

These guys did a great job at our rural property. They are very attentive, I never had to wait on a response. They are always on it! They also figured out how to work with our old barn, which shows they are very flexible. Thanks Full Spectrum!

HappyFullSpectrumCustomer

Reviewed on Aug 24, 2015

Smooth and Professional!

I am fully satisfied with Full Spectrum. I asked a lot of questions, and they quickly and thoroughly answered every one of them. They helped me find the system that was right for me with calm professionalism. They were very responsive throughout the entire project. They kept all of their promises. I honestly can't think of how they could have done a better job. I highly recommend working with them!

madi

Reviewed on Jul 28, 2015

Easy to do and own

All my questions were answered and FSS made it easy to proceed. I just had to sign the check. I love my solar panels.

dmwaller

Reviewed on Jul 28, 2015

A pleasure to work with

We sought a couple of bids and Full Spectrum was competitive, professional, and a pleasure to work with throughout the process. I especially appreciated how well Mark Joyce stayed in touch, explained programs like Focus on Energy, and informed us regularly about the process and progress, They also showed creativity and flexibility in terms of working with a neighbor and re-purposing existing wiring to save $$. The system exceeds my expectations, particularly in terms of all the data the micro-inverters feed to an on-line system that lets us all monitor its performance. Why aren't more people doing this?

jokeane

Reviewed on Jun 21, 2014

good team good install

Full spectrum installed a 5.75kW array on our house in 2012. We are very happy with the system and with the install.

Dtg

Reviewed on Oct 28, 2013

Dave & Maureen

mark was very helpful along with whole crew!

Jeff Kanne

Reviewed on Jul 11, 2013

Michael Joyce, the engineer with whom I worked, was excellent. He fully explained the various system designs, advantages and disadvantages of each, and other options. He communicated with me regularly as information became available and made sure the appropriate regulatory documents were presented to me and managed all of the permitting and inspection.

Steve Bower

Reviewed on May 13, 2013

Full Spectrum has done three jobs for me and I will continue to recommend Full Spectrum Solar! Thanks

Ralph Kauten

Reviewed on May 10, 2013

No surprises. Process was very transparent and personnel were very responsive to questions, etc.

Kris Bohling

Reviewed on Jan 25, 2013

Full Spectrum workers were very helpful on a range of issues and took pride in their work - it shows. They also went out of their way to be clear about any problems which came up during the work while giving me multiple options for ways to resolve them along with their opinion of the benefits of each option.

Denise Sullivan/Bernie Schmelzer

Reviewed on Dec 27, 2012

Full Spectrum was wonderful to work with. Our project manager (Mark Warnick) was very well organized, very pleasant to work with and was a great communicator, so we knew exactly what to expect and when each phase of the project was schedules. The others who worked on our project were very detail oriented, did excellent work and were a pleasure to have here. We couldn`t be happier with the whole process and the results. Our project manager also negotiated with our utility to allow us to do 4kW on a 10 year buy back contract even though the utility only planned to offer 3kW in this area before ending the buy back program. The 4 kW system is more appropriate for us in the long term after the buy back contract ends and so we were very appreciative of his efforts.

Conn and Shari Huffaker

Reviewed on Dec 2, 2012

Because we had already made plans to be away for the entire month of Dec. Mark Warnick had to make a lot of extra trips to our house to let electricians in, etc. We were not fully moved in to the house and Full Spectrum Solar had to work around our schedule. We appreciated all the accommodations they made. Never having had solar panels before we had lots of questions. Mark and other responded right away (via email) and had answers for all of our questions and concerns. We have made arrangements for our training when we return in January.

Ken Baun & Efrat Livny

Reviewed on Dec 1, 2012

Full Spectrum staff were competent, professional and friendly.

Kirsten & Jim Koegel

Reviewed on Nov 7, 2012

Installation was very clean and professional. Panel location and racking does not detract from home appearance. Appreciated the time taken at the start of the project to help us evaluate our options.

Dave Leeper

Reviewed on Oct 31, 2012

Every part of the process was done very well. tax not done yet, still applying for focus on energy

Tim Meehan

Reviewed on Sep 24, 2012

The system is installed and is running well. Installers were professional and considerate. Project manager was knowledgeable and laid back. No complaints, overall. Already recommended them to a neighbor. Have friends who also had a positive experience with the company.

About Full Spectrum Solar

2002
Installing since
42
Customer reviews
4.4
Average rating
1
Area served

What Full Spectrum Solar does

Services

  • Installation

Where Full Spectrum Solar works

  • Wisconsin

Where to find Full Spectrum Solar

Head office

1240 E. Washington Avenue, Madison WI, 53703

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Full Spectrum Solar

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