Technicians for Sustainability has been designing and installing solar energy systems in Southern Arizona for 23 years, making them one of the longest-running dedicated solar companies in a state that has no shortage of sunshine or competition. Based in Tucson, TFS was founded on the idea that solar should be part of a broader approach to sustainable living, not just a way to trim an electric bill.
The reason TFS earned the top spot in Arizona comes down to trust and longevity. In a market flooded with companies that opened during the solar boom of the 2010s, this team has been doing the work since the early 2000s, well before solar panels became mainstream. That experience shows in their system design capabilities, their familiarity with local utility interconnection at TEP and APS, and their understanding of how Arizona's intense UV exposure and extreme heat affect long-term panel performance and inverter reliability.
Their 4.9-star Google rating from 503 reviews places them among the highest-rated solar companies in Arizona by volume and satisfaction combined. Tucson homeowners consistently highlight thorough energy audits, willingness to explain system performance data in plain language, and responsive warranty service.
TFS employs NABCEP-certified installers and works with a variety of equipment brands to match each project's requirements. They handle residential rooftop installations, ground-mounted arrays, and commercial systems. The company has also been involved in community solar initiatives and educational programs in the Tucson area.
With zero BBB complaints and a composite score of 73.8 out of 100, Technicians for Sustainability is our top-ranked solar company in Arizona for 2026.
“We now get our power from the SUN!!! Thanks to Technicians For Sustainability for helping make it so. We started the process late spring and worked with Max B who helped us determine our solar needs....”
Chris F.
“🌟 Review for Technicians for Sustainability (TFS)
I recently had a solar system installed on my home by Technicians for Sustainability (TFS), and I couldn't be happier with the results.
Right from...”
Tony
“Great plan and working with TFS to install a second phase of solar and new battery storage. Team on sight was nice and helped answer questions. Even though one of the batteries required replacement,...”
Charles H.
“TFS is simply an outstanding solar and storage battery whisperer. Their well trained staff have accomplished 5 star installs and service for my gradually expanded rooftop system since 2017. My...”
Melody L.
“We are so very happy with our solar installation from TFS. Every single person we interacted with from start to finish was knowledgeable, professional, and had our best interests at heart.
We knew...”
Danielle F.
“TFS is the gold standard for professionalism and quality. Their sales team is knowledgeable and zero pressure, and their installs are clean, fast, and reliable. This is our second home with a TFS...”
Milly L.
“I am on the Board of Directors of a very low income senior housing facility that was fortunate enough to win a grant from the City of Tucson, part of which was used to install a solar system. TFS...”
Carrie B.
“We had an excellent experience installing solar panels on our house through TFS. Communication was clear and thorough, walking us through every step of the process. Everyone we interacted with was...”
Redline Electric & Solar has spent the better part of two decades building one of the most operationally credible electrical and solar contracting practices in the Phoenix metro. Founded in 2009 by Joshua Farley — a Tempe native and master electrician with more than 25 years of trade experience — the company is headquartered at 125 W Gemini Drive in Tempe and now serves more than a dozen Maricopa County cities, including Phoenix, Scottsdale, Mesa, Chandler, Gilbert, Glendale, Peoria, Queen Creek, Apache Junction, Paradise Valley, Ahwatukee, and Laveen. Farley remains President and CEO, with Marcus Soto serving as Chief Operating Officer overseeing day-to-day operations.
The certifications stack on the solar side is unusually deep. Both Farley and Soto hold individual NABCEP PV Installation Professional credentials (PV-020419-06733 and PV-020419-020991, respectively), and the company is recognized as a Tesla Powerwall and Wall Connector certified installer, a T3 Energy certified installer, and a Solar Insure certified installer. Redline operates under Arizona ROC license #254292 and PVIP #PV-020419-016733. Their EnergySage profile lists Hanwha SolarOne and Q-cell panels paired with Enphase inverters, with sonnen and Generac battery storage, and the company backs its work with a 25-year labor workmanship warranty — one of the longer workmanship coverage periods we reviewed in Arizona. Sunlight Financial is the named financing partner for customers using loan products.
What stood out to our research team is the depth of the electrical foundation behind the solar work. Redline's full-service electrical practice spans panel upgrades, whole-house rewiring, generator installation, EV charging, and emergency repair, and the company publishes a 2-hour emergency response guarantee under its "Never Be Without Power" tagline. That kind of in-house electrical capability matters for solar customers because main service panel upgrades, sub-panel reconfiguration, and battery backup integration are routinely the most technical pieces of any modern PV-and-storage installation. Redline has been named to the Inc. 5000 list of fastest-growing private companies, with the company reporting four consecutive years on the list.
With a composite score of 73.7 out of 100, Redline Electric & Solar holds the second-ranked position in Arizona for 2026.
“Listened to my concern about an electrical issue at our home. They came out and inspected the system and found no problems. They were responsive and very timely. Great service.”
David S.
“Redline Electric & Solar were quick, clean and did a great job coordinating! Their communications were clear and effective. Their workmanship was top notch. They are super responsive. We are very...”
sr w.
“David was friendly and explained my electrical problem clearly. He repaired the outlet and recommended some upgrades which I appreciated. He checked out other outlets and even helped me find a...”
Keith O.
“Excellent service. Not an emergency but a technician was scheduled for next day. He was very friendly and fixed the two problems in less than 30 minutes. Very impressed.”
Stephen H.
“I'd give zero stars if I could. Company used the improper wire nuts, leading to a short, meting wire and taking out a panel. After weeks of dodging phone calls and unanswered emails and phone...”
Jacob A.
“Great company, & they pick up the phone. They showed up on time & got things done quickly. They seem more organized than most service providers in the Valley.”
Gregory C.
“Redline did a excellent job with all of our electrical needs. Definitely our go to electrical company. Shot out to Conner and Gavin. Great work!”
Shannon D.
“Fast and efficient! Learned a lot about our EV 240 plug that melted. Scheduled a next day estimate. Dylan was able to do the repair when he came out. We had the part for him to install instead of...”
American Solar & Roofing occupies a unique position in the Arizona market that no other installer in the state can credibly claim: they are a fully licensed roofing contractor and a fully licensed electrical contractor operating under the same roof. Founded in 2001 in Phoenix, the company holds Arizona Registrar of Contractors licenses for both CR-11 electrical and CR-42 roofing classifications, which means their crews can handle every phase of a solar project from tear-off to final interconnection without bringing in a single subcontractor. In a desert climate where roof integrity is inseparable from panel performance, that dual expertise matters more than most homeowners realize.
The company has earned a 4.6-star Google rating across 404 verified reviews, a volume that reflects 25 years of steady residential and commercial work across the Phoenix metro area. American Solar & Roofing installs Tier 1 panels from manufacturers including SMA America, LG Solar, and Hyundai Energy Solutions, backed by 25-year manufacturer warranties and a two-year workmanship guarantee on the installation itself. Their inverter warranties run a standard 10 years. NABCEP certification is held at the company level, and their team carries additional credentials from CertainTeed, Malarkey, and OSHA safety programs.
What stood out during our evaluation was the company's BBB record. American Solar & Roofing holds an A+ rating with the Better Business Bureau and has been recognized with the Ranking Arizona designation as the number one residential solar installer in the state. They are also listed as an SRP Preferred Solar Installer, a designation that Salt River Project does not hand out casually. These institutional endorsements, combined with their Angie's List Super Service Award history, paint a picture of a company that has maintained quality standards over a long period rather than scaling fast and hoping customer service catches up later.
Financing is available through cash purchase and loan options. The company's annual revenue of approximately $11.7 million with a team of around 39 employees suggests a mid-size operation that is large enough to handle complex projects but small enough to maintain direct accountability on each job.
With a composite score of 71.7 out of 100, American Solar & Roofing earns the third-ranked position in Arizona for 2026.
“Danny did a outstanding job in the reinstallation of our new solar inverter. He was aware of the electrical codes and made me aware of that. He was truly professional, he is a asset to AmericanSolar.”
Joni M.
“The American Solor & Roofing team did an excellent and professional job installing the solar panels, conduit, inverter and critter screens on my Tucson home! Jose made sure I was informed on...”
Chong H.
“Great experience with AS&R during our solar installation. The teams were very professional from managers to installers. Sean quoted us the right configuration with some growth. Jose Leon, our...”
Todd S.
“I don't think I can possibly stress enough how hard it is to find a solar company that tells the truth, and is very transparent and honest about solar systems and what you want to accomplish with...”
Joshua C.
“Raleigh was very professional and very knowledgeable. He walked through steps and was able to answer all my questions. He found ways to solve problems that arose to make myself feel as the up most...”
Tito H.
“The experience with American Solar and Roofing was fantastic from start to finish. The initial consultatiion was just that instead of a sales pitch. I had with Sean an information sharing session...”
Bob B.
“We had an installation upgrade to our inverter that was dying. Our service technician, Raleigh did a great job on the work preformed. On time, neat, tidy and very helpful with getting us setup...”
Peggy H.
“Peggy and I recently had a roofing repair done by American Solar and Roofing and took the opportunity to upgrade the Solar at the same time. As with our past experience with this company, about 20...”
State income tax credit: 25% up to $1,000|Property tax exemption (100% of added value)|Sales tax exemption on solar equipment|Net billing at ~50% of retail rate|Utility rebates available (varies by provider)
The Arizona Corporation Commission (ACC) has ordered utilities to use the RCP rate rather than net metering to compensate customers for excess solar energy.
Arizona's Net Billing Policy Since 2016, Arizona does not offer a true net metering system but instead incentivizes solar panel installation through a program ...
The Office of Resiliency received a termination notice from the U.S. Environmental Protection Agency regarding the Solar for All grant on August 7, 2025.
According to the Short Term Energy Outlook released on September 9, 2025, renewable's share of electricity generation will increase to 24% in 2025, up from 23% ...
This article delves into the myriad benefits of solar panels in Arizona, providing insights into how they can transform energy consumption for homeowners and ...
*Companies displaying 15 or more years in business are typically established electrical, roofing, or general contracting firms that expanded into solar installation in more recent years. The years shown may reflect the age of the parent organization or a strategic partner, not necessarily the solar division itself. This distinction is worth considering when comparing to dedicated solar installers, as purpose-built solar companies may offer more specialized expertise despite a shorter operating history.
