This book looks at the challenge of providing reliable and cost-effective power solutions to expanding communications networks in remote and rural areas where grid electricity is limited or not available. It examines the use of renewable energy systems to provide off-grid remote electrification from a variety of resources, including regenerative fuel cells, ultracapacitors, wind energy, and photovoltaic power systems, and proposes a powerful hybrid system that can replace the need and high operation costs of batteries and diesel powered electric generators.