Renewable utility companies generate electricity from wind, solar and hydropower under long-term power purchase agreements that provide revenue certainty over the operating life of their assets. The business model, at its best, resembles infrastructure: predictable contracted cash flows from assets with low operating costs and multi-decade lives. Policy support — renewable portfolio standards, feed-in tariffs, tax credits — has been the historical demand driver, and changes in policy can significantly affect project economics. The cost of solar and wind power has fallen to the point where renewables are the cheapest source of new electricity generation in most markets, which reduces policy dependency and creates genuinely market-driven growth. The challenge is intermittency — wind and solar generate power when weather allows, not necessarily when demand is highest — which requires grid-scale storage or balancing with dispatchable power sources. For investors, companies owning long-term contracted renewable portfolios offer infrastructure-like risk-return profiles, while developers without long-term contracts face merchant power price exposure that adds meaningful earnings volatility.