<![CDATA[The output power monitoring system of a photovoltaic (PV) power plant was developed to analyze the effect of surface temperature control on solar panel performance. The study utilized a 50 Wp monocrystalline solar panel. An experimental method was employed by comparing panel performance under two operating conditions: without a cooling system and with a water-cooling system. The system was integrated with a real-time monitoring platform capable of measuring panel surface temperature, voltage, current, and output power continuously. Testing was conducted from 09:00 to 13:00 WIB. The novelty of this study lies in the integration of a water-cooling system with a real-time monitoring system for a 50 Wp PV module to directly evaluate the relationship between panel surface temperature and output power. The results indicate that the implementation of the cooling system increased the output power from 16.95 W to 29.70 W at 10:00, from 32.64 W to 35.88 W at 11:00, and from 36.72 W to 38.64 W at 13:00. In addition, the panel surface temperature remained more stable within the range of 29.3–35.6°C. These findings demonstrate that reducing the panel surface temperature can effectively enhance output power and improve the operational stability of the PV system]]>
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