Why tax credits should not be given for using renewable energy?

I don't know any web sites but I can tell you why I don't like the idea of tax credits for alternative energy. Tax credits are a penalty against conventional energy sources. If the alternatives are so great they shouldn't need tax credits to make them competitive. Using tax credits to make alternative energy able to compete with conventional sources doesn't encourage the companies that make alternatives from improving their products to compete in a free market. The tax credits have to be replaced with some other source of revenue or savings. The term "savings" is not known to the government so they raise taxes or increase the deficit. Their is also the administrative cost of monitoring the tax credits. That means more government. Let the laws of supply and demand work without government interference