This white paper outlines the safety issues at stake in energy storage projects, and explains how fire testing to UL 9540A standards helps project stakeholders address safety issues and meet expectations of the authorities having jurisdiction (AHJs). . Because of the growing concerns surrounding the use of fossil fuels and a greater demand for a cleaner, more efficient, and more resilient energy grid, the use of energy storage systems, or ESS, has increased dramatically in the past decade. Renewable sources of energy such as solar and wind power. . Renewable sources of energy such as solar and wind power are intermittent, so storage becomes a key factor in supplying reliable energy. However, the rise in the number of. . The International Renewable Energy Agency predicts that with current national policies, targets and energy plans, global renewable energy shares are expected to reach 36% and 3400 GWh of stationary energy storage by 2050. Poor quality. . Solar+storage project developers are operating in a dynamic regulatory environment where basic requirements can vary with time and location, leading to project delays and increased costs. The guide is organized aro nd 12 topic area questions.