Abstract: Systems and methods are described for generating electricity from fluid produced from a subsurface formation. The disclosed systems and methods include generating electrical power using the energy content of fluids produced from the earth or hot fluids created during surface processing of the produced fluids. Fluid is obtained from a well in the subsurface formation and provided to a first power generation device where a pressure and a temperature of the fluid is adjusted to a pressure and a temperature compatible with the first power generation device using one or more valves coupled to the first power generation device. The first power generation device generates electricity from the fluid. One or more second power generation devices also generate electricity using the fluid where one of the second power generation devices is a thermoelectric generator.