Abstract: The present invention relates to water use monitoring, recording and billing, and more particularly to monitoring, recording and billing for water use at both an individual fixture and dwelling unit-level in a multi-unit dwelling structure. In an embodiment, a module includes an inlet portion defining an inlet opening and adapted to be connected to and in fluid communication with a fluid inlet line; and a first flow conditioner in fluid communication with and adapted to receive and condition a fluid flowing through the inlet opening. The module also includes a flow measuring device in fluid communication with the first flow conditioner and adapted to measure the conditioned fluid as the conditioned fluid flows past the flow measuring device and to generate a signal representing an amount of the conditioned fluid flowing past the flow measuring device; and a power generator in fluid communication with the first flow conditioner and adapted to generate and supply power.