@thesis{thesis, author={Januarsono Santoso and Putra Alhadi Marza}, title ={ANALISA SUSUT ENERGI PEMBANGKIT LISTRIK TENAGA SURYA 50,8 KWP PADA ATAP GEDUNG UNITED TRAKTOR}, year={2019}, url={http://156.67.221.169/700/}, abstract={Indonesia is a country with fossil energy use, such as fuel and coal are still in the top rank as a primary energy source for power plants. This energy shrinkage analysis study aims to optimize output power on the PLTS roof of the united tractor roof. This study uses the receipt method directly from the system monitoring data. The irradiation data is used as the initial benchmark of the power produced assuming 100% before being received by the solar module. While data from system monitoring installed in the inverter is energy that has experienced shrinkage due to cables, inverters, system monitoring, the effect of temperature and the effects of shadows falling on solar modules. From the calculation of energy comparisons from irradiation and from monitoring, there can be a different amount of losses each month, ie in June 11,186%, July 10,479, August 11,688%, September 11,090% and October 11,660%. Whereas from the direct calculation results were lost in June 12.032%, July 10.568%, August 9.635%, September 9.261% and October 9.798%. This difference is caused by different weather factors in each month and temperature differences in the environment and on solar panels that occur every month. The way to reduce loss on the solar power system can be done by reducing the length of the cable and reducing the effect of light falling on the surface of the solar module Keywords: Power Flow, Optimization, irradiation, power, energy} }