A renewable energy certificate business model embodiment of the present invention accumulates small shares of qualifying energy produced by many small solar installations into the minimum unit sizes that can be certified, traded and sold. Renewable energy generation and load control monitors are installed at hundreds and thousands of small installations to automatically report to centralized servers. These servers log and certify the production of renewable energy into the lot sizes needed for an efficient market. A system integrator provides the brokerage mechanisms needed for buyers and sellers to trade quickly and easily. In one aspect, an online auction website is constructed and maintained on the Internet as a centralized clearing house. The system integrator backs the quality of the lots and the trades with their large enterprise reputation and credit worthiness. The trading can be in renewable energy portfolios, emission offsets, carbon dioxide offsets, and other environmental attributes.