Article needed on the benefits of having a business plan for clean tech companies

Please write a piece on the benefits of having a business plan for renewable energy or clean tech companies. This will be for a business plan company. The sectors includes solar power, wind power, geothermal, biomass and others. All companies need a business plan for several reasons. 1. to obtain funding 2. A blue print for management 3. to go public - required by regulators The SBA (Small Business Association) has good information on statistics and sources of business plan information.