Renewable energy engineering designs systems converting solar, wind, biomass, biogas, geothermal, and hydroelectric resources into usable energy. Engineering disciplines include process engineering for biogas upgrading and biomass conversion, mechanical engineering for equipment design, electrical engineering for generation and interconnection, and civil engineering for facilities and foundations. Projects range from distributed generation serving single facilities to utility-scale installations.

Engineering challenges include variable resource availability requiring storage or backup, conversion efficiency optimization, integration with existing infrastructure, environmental considerations, and economic viability without subsidies. For biogas and biomass systems requiring fabricated equipment, engineering develops process designs, specifies equipment, selects materials for service conditions, and defines quality requirements. Renewable energy engineering market growth comes from climate policies, corporate sustainability commitments, improving economics, and technology advancement making renewables competitive with conventional energy.