Electrical voltage and current measurements from multiple grid-connected photovoltaic systems on the rooftop of ETSIDI-UPM (Madrid, Spain)

This dataset contains electrical measurements from a set of grid-connected photovoltaic systems installed  on the rooftop of the ETSIDI (UPM),  located at 40°24'19.4"N 3°42'10.1"W in Madrid, Spain. Measurements include DC and AC voltage, and DC and AC current collected by measuring units of Carlo Gavazzi (VMUSAV30XSXX for DC variables and EM112DINAV01XS1X for AC variables). 

The data are provided as daily CSV files, which are grouped into monthly ZIP archives. Each record corresponds to a temporal resolution of 5 minutes. Time stamps are expressed in local time (time zone: Europe/Madrid). Current values are expressed in amperes, voltage values in volts and cell temperatures in degrees celsius. Tc denotes cell temperature. Vdc and Vac denote the DC and AC voltages, respectively, whereas Idc and Iac denote the DC and AC currents, respectively. Data gaps may occur due to maintenance operations, sensor recalibration, or temporary acquisition failures.

The version 1.0 of the dataset covers the period May 2025 to March 2026. Each new version adds a monthly archive.