This essay provides an analysis of sustainability within the context of resource use in hospitals, focusing on the adoption of renewable energy sources. It discusses the increasing use of renewable energy in Australian hospitals to reduce carbon emissions and manage utility costs. The essay identifies key stakeholders, defines sustainability based on its three pillars (environmental, social, and economic), and addresses concerns related to each pillar. Recommendations are provided for hospitals to achieve sustainability through mission-driven imperatives, bottom-line considerations, and a focus on energy efficiency. The essay concludes that renewable energy is a powerful resource for hospitals, requiring a mix of market conditions, policy support, and natural resource availability to be economically viable and sustainable.