About Us

Founder & CEO
William J. Anderson
Career and Contributions
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Anderson is the founder and CEO of SameDay Solar, a California-based company specializing in rapid, high-quality residential solar installations. Under his leadership, SameDay Solar has distinguished itself by delivering swift and efficient solar solutions, emphasizing customer satisfaction and operational excellence.
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Prior to establishing SameDay Solar, Anderson co-founded Complete Solar, where he served as CEO. In 2022, Complete Solar merged with Solaria to form Complete Solaria, a vertically integrated residential solar company. Anderson led the combined entity as CEO, guiding its growth and innovation in the solar industry.
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Educational Background and Early Inspiration
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Raised in Colstrip, Montana, a town known for its coal mining industry, Anderson was inspired from a young age to seek sustainable energy solutions. He pursued higher education at the Massachusetts Institute of Technology (MIT), earning a degree in Chemistry and Finance, and later obtained an MBA from Stanford University. His early experiences and education have fueled his dedication to transforming the energy landscape through solar technology.
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Industry Impact
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Throughout his career, Anderson has been instrumental in developing scalable solar platforms and fostering partnerships that enhance the accessibility and efficiency of solar energy systems. His work continues to influence the growth and direction of the solar industry in the United States.

Chief Revenue Officer
Mark Stacy
Career Highlights
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SameDay Solar, Inc.
As CRO, Mark leads revenue strategy and growth at SameDay Solar, helping the company deliver fast, efficient residential solar installations with a strong focus on customer satisfaction and operational excellence.
Thrive Power
Mark is the Chief Executive Officer (CEO) of Thrive Power, a solar finance company that specializes in providing Power Purchase Agreements (PPAs) to customers who have difficulty qualifying for traditional solar financing. Under his leadership, Thrive Power expands access to clean energy for underserved markets.
Infinity Energy, Inc.
From 2014 to 2022, Mark held executive roles at Infinity Energy, including President of Channel Partners and CRO. He oversaw major expansion efforts across California and played a critical role in diversifying supplier partnerships and scaling the company’s workforce. Under his leadership, Infinity Energy was ranked No. 5 on Solar Power World’s Top Solar Contractors list in 2022, a testament to the company’s operational excellence and growth.
Educational Background
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Mark holds a Bachelor of Science in Electrical Engineering from California State University, Sacramento, and also studied Business at Brigham Young University.
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Industry Impact
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Across his career, Mark Stacy has demonstrated a strong ability to scale clean energy businesses and lead high-performing sales teams. His strategic mindset and operational leadership have contributed to the success of multiple solar companies and furthered the advancement of renewable energy solutions.
For more details on Mark Stacy’s professional background, visit his LinkedIn profile:
