PV module test bench at Citadel building and monitoring of a 29.4 kWp PV system at Oost-Horst – commissioned by University of Twente, 2013 till present. The PV test bench comprises 6 PV modules and analytical monitoring at a 1-minute time scale of electrical, temperature and meteorological data among which the measurement of spectrally distributed irradiance. The PV system is measured at the inverter both for DC and AC power.The data are used for evaluations and simulations of PV modules and solar spectra and can be applied for other purposes as well.