Recent developments in technology have been considered a critical factor in fighting climate change and accelerating energy transition. These developments are changing the current centralized and fossil fuel-based energy system into a new system with integrated renewable energy resources. The developments also facilitate the emergence of new business models and allow entrepreneurs to propose new products and services. This paper aims to identify the existent energy business models based on a systematic literature review, focusing on two main areas: renewable energy and demand-side management. With that purpose, a framework is described including specific characteristics for energy business models. Based on this framework, 22 different energy business models are presented clustered in eight patterns. The study draws on an exhaustive picture of the emerging business models and provides insights for researchers and for early-stage companies to innovate through business model transformation.