Book excerpt: This expansive reference on clean energy technologies focuses on tools for system modelling and analysis, and their role in optimizing designs to achieve greater efficiency, minimize environmental impacts and support sustainable development. Key topics ranging from predicting impacts of on-grid energy storage to environmental impact assessments to advanced exergy analysis techniques are covered. The book includes findings both from experimental investigations and functional extant systems, ranging from microgrid to utility-scale implementations. Engineers, researchers and students will benefit from the broad reach and numerous engineering examples provided.