Additionally the cost of evaluating these risks is too onerous for most financial asset buyers. Consequently there is a very small pool of private capital available to invest in this form of energy infrastructure asset. Such projects must generally be financed entirely with equity which is a challenge since the current venture capital and private equity markets are unsuited for high-capital project investing (Firelake Capital, 2012). This is defined as the risk that the system being installed does not work as specified. For existing electric utilities, this risk is mitigated by a hundred years of experience building power plants, and by performance guarantees issued by engineering and construction firms.