A data acquisition (DAQ) system is a computer-based method used to measure conditions in machines and environmental conditions. Data acquisition systems use a computer to receive data from electronic sensors that measure variables such as temperature, pressure, flow, voltage, and current. The computer then uses software to analyze, display, and store the data it receives.

Data acquisition systems are commonly used to monitor solar and wind conditions to determine if a given site is suitable for the installation of solar panels or wind turbines. To collect wind data, for example, a meteorological evaluation tower (MET) might be installed on the site and allowed to collect data for a period of time to determine the nature of the wind characteristics at that site. Data acquisition systems are also used to monitor operating conditions after installation of the solar PV or wind turbine systems. The DAQ system may be part of the solar and wind system controllers or a separate system. These systems typically monitor the wind or solar system itself as well as the wind or solar conditions, thereby monitoring total system performance.