In December of 2008, Gleim, an industry leader in the production of accounting and aviation (pilot training) material, had solar electricity generating system installed on the rooftop of its main building at 4201 N.W. 95th Blvd. in Gainesville. Things have been sunny ever since.

The system, largest in Gainesville when it was first activated, remains one of the largest and is one of the few systems that is actually producing more electricity than the business is using, making Gleim a "net negative" user of energy.

The Gleim system was the first feed-in tariff commercial system in the United States. Feed-in tariff was first promoted in Germany and has led Germany to now be the world's largest solar market.

Launched for the first time in the US in March of 2009 by Gainesville Regional Utilities, a city-owned utility, the Feed-in tariff program encourages local businesses to invest in renewable energy. Under the program, GRU, which serves some 90,000 customers, contracted to buy power back for 20 years at a predetermined price. Rates were determined by the size of the system installed.

Dr. Irvin Gleim, President of Gleim states "We see ourselves as stewards of the environment. Philosophically, making this investment was the right thing to do and fits with our existing operation. Gleim, with 100+ employees recycles all paper, cardboard, aluminum, steel cans, glass bottles, plastic bottles, and wrapping, steel shipping bands, and styrofoam to the extent that garbage disposal is handled by several 30 gallon garbage cans equivalent of 2-3 typical households. Gleim is as green as they can get with the help and participation of each and every Gleim team member. The GRU program made the decision to install the solar electricity generating system good business sense."