Humankind is turning its attention to space again with renewed ambition and investment, and along with this will surely come an ever-increasing need for energy and for power. It is the fundamental enabler for all activity in space. Life support, communications, mining, propulsion, sensors, surveillance and security – none of these happen in space without power. Historically, power has been provided by solar panels (or in some rare cases, radioactive generators or RTGs) that are attached locally to satellites or space stations. But, as the need for power increases and the applications expand, a more scalable and flexible form of power generation and distribution will be needed (much as it is on Earth with the power generation and distribution systems).