Based in upstate New York, Combined Energies designs and manufactures patented specialty power electronics for clean-energy systems, including its Marathon LR DC-to-DC converter. Initially developed for fuel-cell applications, the company’s technology is built to manage variable low-voltage sources while improving conversion efficiency and reducing system size and cost. Combined Energies also draws on 30 years of experience designing and integrating residential-scale high-temperature PEM fuel-cell systems.