In the days of sail commerce flowed faster and ships traversed coastal waters safely by catching favorable tides.  The industrial development of the United States depended on reliable and efficient maritime commerce.  No where was this more important than between Boston and New York, where geography and current conspire to create asynchronistic and vicious tidal changes, waylaying and sinking many ships in the process. That was until Captain George W. Eldridge developed the now-famous guide to New England waters, which publishes reliable tide tables to ensure mariners catch a “fairtide.”

Understanding and harnessing favorable conditions to achieve attractive economic returns and maximum sustainability results is our ethos and the inspiration for the name Fairtide.   We engage in helping traditional industries adopt new technologies to create sustainable value for customers, shareholders, and societies.




Nat Kreamer

Nat is the founder and CEO of Fairtide Renew as well as the  CEO of Advanced Energy Economy and its Institute. Advanced Energy Economy (AEE) provides education about and advocacy for all of the technology innovations that make powering our industrialized economies more affordable, clean, and secure.  Nat is the chairman emeritus of the board of directors of the national Solar Energy Industries Association (SEIA), lecturer at the Institute for Sustainable Energy at Northwestern University, and member of the National Advisory Council for Grid Alternatives, which installs free solar systems for low-income families and provides solar job training. He was previously president and CEO of Spruce Finance and its predecessor Clean Power Finance as well as Advisor to the Rocky Mountain Institute (RMI). Nat sold the first residential solar power purchase agreement in the U.S. when he co-founded Sunrun (NASDAQ: RUN) and served as its president and COO. Nat was subsequently the president and member of the board of directors of Acro Energy Technologies (TSX: ART). He created the Chicago Climate Exchange market-making business for Pioneer Futures (Virtu Financial) and worked in power industry financial consulting at PricewaterhouseCoopers. An officer in the US Navy (Reserves), Nat is a veteran of the war in Afghanistan, where he served in the Special Forces and was awarded the Bronze Star Medal. President Obama named Nat a “Champion of Change” for his work as a veteran in clean energy. He also received the Truman Visionary Leadership Award, “Most Admired CEO” award from the San Francisco Business Times, and was a finalist for the Ernst & Young Entrepreneur of the Year award for Northern California. Nat has a BS from Northwestern University and an MBA from Rice University.


Fairtide Renewable Energy LLC

San Francisco, California, United States