Raw photovoltaic current measurements from low-cost poly-Si and mono-Si panels with Raspberry Pi based sensing (2024 to 2025)

This dataset contains minute-resolution photovoltaic current and environmental measurements recorded at an outdoor measurement station in Piatra-Neamț, Romania (46.95° N, 26.39° E) between 29 July 2024 and 27 June 2025. The measurement system consisted of a Raspberry Pi 5 installed inside a protective enclosure, interfaced with a Waveshare INA219 current sensor HAT and a BME280 environmental sensor. Two small photovoltaic panels were mounted outdoors, flat (0° tilt) and facing south, and were cleaned daily to reduce soiling effects. The INA219 channels were connected as follows: Current1: polycrystalline silicon photovoltaic panel (0.3 W, 3 V) Current2: monocrystalline silicon photovoltaic panel (1 W, 5 V) The dataset includes the following variables: Timestamp (local time, UTC+2) Photovoltaic current measurements from both panels Ambient temperature, relative humidity, and atmospheric pressure All data are provided without preprocessing, filtering, night masking, or derived solar variables. Missing values reflect sensor unavailability or communication interruptions. Occasional large negative current values are present and correspond to sensor or analog-to-digital conversion artifacts; these values were intentionally retained to preserve the raw measurement characteristics. This dataset is intended to support research on low-cost photovoltaic sensing, environmental measurements, signal analysis, and solar energy modeling. Derived features and machine-learning-ready inputs used in related studies were computed separately and are not included in this archive.