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Third Sun Solar

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LAST UPDATED: June 11th, 2021

Third Sun Solar is a clean energy company that was founded in 2000 by Michelle and Geoff Greenfield. With over 600 renewable energy projects generating more than 11MW of electricity throughout the country, Third Sun Solar is a leading solar installer in Ohio and one of the top solar power providers in the United States and has helped hundreds of customers to lower their electricity bills and reduce their carbon footprint. The company, which offers both residential and commercial solar energy services, became a certified B-Corp in 2012 and was only the third business to secure the certification in the state of Ohio. 

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The Good

  • Zero-Down Financing for Solar Energy Systems
  • Lengthy Warranties
  • Straightforward Solar Installation Process
  • High-Quality Equipment
  • Referral Program
  • Experience 

Zero-Down Financing for Solar Energy Systems 

Third Sun Solar offers a Smart Solar Financing program that allows many homeowners to finance their solar array with as little as zero down. This financing option gives many individuals the opportunity to switch to solar power and reap the benefits of clean energy. 

Lengthy Warranties 

Third Sun Solar offers a 17-year workmanship warranty that covers the installation, attachment of the array, waterproofing on the roof, and electrical wiring of the system. According to the company's website, nearly all solar panels come with a 25-year manufacturer's warranty; an easy promise to make with predictable and mature technology that has no moving parts. Inverter warranties vary by manufacturer, ranging from 7 to 25 years. 

Straightforward Solar Installation Process 

With Third Sun Solar, switching to renewable energy is simple and straightforward. The first step is a free consultation, during which the company's experts design a customized, optimized solar solution; provide estimates on future savings and financial payback, and discuss Smart Solar Financing options. Next, Third Sun Solar's well trained, trusted crew takes care of all of the permitting and paperwork and performs the installation. After the inspections are complete and the final connections are made to the local utility, Third Sun Solar activates the solar PV system.

High-Quality Equipment

Third Sun Solar is an authorized dealer of SunPower solar systems, meaning the solar company installs among the most energy- and cost-efficient solar arrays in the industry. Per Third Sun Solar's portfolio archive, the company also implements SolarEdge inverters into the systems, which likewise rank highly in terms of efficient transfer of solar energy into electricity. 

Referral Program 

Third Sun Solar provides a referral program to reward its customers for sharing the benefits of solar energy with their friends and family members. Referred customers will receive a $250 discount on their system, while the customer who referred them will earn a $500 gift card. There is no limit on the number of referrals that a customer can give. 


Third Sun Solar has been in business for nearly two decades and completed hundreds of solar projects. Additionally, the company is NABCEP-certified, the gold standard certification for installers of solar systems. 


The Bad

  • Limited Availability
  • No Lease or PPA

Limited Availability 

Currently, Third Sun Solar only provides solar power services to homeowners in Ohio, Indiana, Michigan, Kentucky, and Pennsylvania. Individuals who live elsewhere will need to find a different company that operates in their area.

No Lease or PPA

Third Sun Solar does not offer residential solar customer the option to lease their system or pay only for the system's energy output via power purchase agreement (PPA). While these options neither grant customers ownership of the system nor access to important tax incentives or solar credits, they can drastically reduce the upfront and long-term costs of financing a solar panel system — at no interest. Customers only interested in lowering their monthly electric bill and are not able or willing to take on the substantial cost of their own solar panel system should look elsewhere.


The Bottom Line

Third Sun Solar is a well-established renewable energy provider based in Ohio. The company offers a number of attractive features, including zero-down financing, lengthy warranties, a straightforward installation process, a referral program, and several years of experience. However, Third Sun Solar's residential clean energy services are currently only available in Ohio, Indiana, Michigan, Kentucky, and Pennsylvania. If you live in one of these states, Third Sun Solar is worth considering. However, if you life outside of this service area, we recommend checking out other solar companies that do operate in your state. 

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VinnieG Cincinnati, OH

Third Sun provided straight-forward, easy-to-digest cost/benefit analysis and carried top tier solar panels. Installation was a breeze. Sometimes, their communications are not clear. Overall, I would hire them again - they know what they are doing.

2 years ago