This whitepaper explores the various environmental factors that influence the performance and longevity of supercapacitors in energy storage systems. It highlights the impact of voltage and temperature, noting that overvoltage can significantly reduce supercapacitor lifespan. The paper also advises on best design practices, such as operating supercapacitors at slightly lower voltages. Additionally, it discusses the sensitivity of supercapacitors to ambient temperature fluctuations, despite their minimal internal heat generation, and the importance of effective thermal management.