Informations on the columns of the file « data_pv1_sirta_2015_2021_10min.csv »

# Creation date: 21/07/2025
# Contact : Jordi Badosa (e4c_datahub@ip-paris.fr)

#Description
Photovoltaic production depends on many factors starting from the choice of the PV technology and the conditions to which PV modules will be exposed in terms of exposure to sunlight, temperature, dirt, shading, atmospheric water (humidity, rain, snow, dew, frost) and the surrounding environment.PV modules are usually qualified by the manufacturers under controlled laboratory conditions (known as the Standard Test Conditions, STC, and Normal Operating Conditions, NOC), which are useful to assess and compare the performance in a standardized way, but which might radically differ from real-life conditions.

#Objectifs du projet
The datafile associated to this document was constructed in the frame of the PhD thesis of Moira Itzel Torres Aguilar (2020-2024,https://theses.fr/2024IPPAX025) The main objective of this PhD project was to develop key performance indicators of PV systems under operating outdoor conditions that rely on data produced in the PV field. Three scientific steps are necessary to reach this general objective: (1) What are the impacts on PV module performance of environmental conditions (e.g. geometry, solar spectrum, …), for different panel technologies? (2) Which environmental impacts can be assessed in real PV systems equipped with optimizers? (3) What new PV-system performance indicators could be developed to support monitoring and maintenance of real PV systems?

#Méthodologie
 Detailed measurements (including the I-V curve key points, module temperature, and POA irradiance) are available for 5 PV modules, as well as meteorological measurements, solar irradiance (global, direct, diffuse) and some basic calculations (solar angles). 
The PV1 experimental photovoltaic research platform was installed at the SIRTA observatory in 2014 and is made up of five PV modules of different technologies and a meteorological station. The technologies installed are: a-Si/µc-Si, sc-Si, CIS, HIT, and CdTe. All panels are oriented to the south (azimuth angle of 0°) with a tilt angle of 27°. Despite all modules being installed in 2014 and being exposed to the same outdoors conditions since then, measurement availability is not the same for all. 

# Time step 
For meteorological (including irradiance) data, the native sampling is 1s and 1-minute averages are computed from that. I-V curve measurements, as well as POA irradiance and PV module temperatures are measured about every minute. The file contains 10-minute averages from these native resolutions.

# Quality control
The file contains raw data with no quality control procedures applyed. 

# Columns information 
(See the PV1_SIRTA_installation_data_description_Aug2025.pdf file for more information)

	•	Date and time (in UTC). Each time stamp correspond to the starting time for the 10-min period. 

	•	Measurements for the 5 panels on the platform: Sharp, FranceWatts, SolarFrontier, Panasonic, FirstSolar
	⁃	Imax: Current measured at the maximum power point MPP (A)
	⁃	Vmax: Voltage measured at the maximum power point MPP (V)
	⁃	Isc: Measured short-circuit current (A)
	⁃	Voc: Measured Open Circuit voltage (V)
	⁃	FF: Fill factor (%)
	⁃	Tp: Panel temperature measured on the backface with a PT100 sonde (ºC) 
	⁃	Pmax: Power at Maximum Power Point measured from the I-V curve (W)
	•	'CM3Dn’: Plane of Array irradiance measured next to the PV panel with a pyranometer SR01 from Hukseflux (W/m2)
	•	'WS_ms_2’: Wind speed measured next to the PV panels (m/s)
	•	'AirTC’: Air temperature measured next to the PV panels (ºC)
	•	‘RH’: Relative Humidity of the air (%)
	•	'Direct_Solar_Flux', 'Diffuse_Solar_Flux','Global_Solar_Flux’, 
	⁃	Direct normal Irradiance and 
	⁃	Diffuse horizontal Irradiance 
	⁃	Global Horizontal Irradiance,
	⁃	all measured on the top roof station located 600m south from the PV panels (W/m2)
	•	Angles: 
	⁃	SZA, solar zenith angle (deg)
	⁃	SAA, solar azimuth angle (deg)
	⁃	AOI, angle of incidence with respect to the plane of the PV modules

# DOI : 
- https://doi.org/10.14768/8bb5e4cc-485a-49bb-88ee-f05cc8d2573c

# Licence : 
- Data : under license CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/)
- The use of data and code for AI training is forbidden without explicit authorization.

# Contact : 
- For any questions or further information, please contact e4c_datahub@ip-paris.fr.