Pembangkit Listrik Tenaga Surya (PLTS) Off-Grid 1 kWp di STT-PLN merupakan salah satu pembangkit listrik yang dibangun di STT-PLN guna menunjang penelitian energy baru terbarukan terutama PLTS. Sejak PLTS OffGrid 1 kWp di STT-PLN beroperasi belum banyak diketahui potensi energi listrik yang optimum, hasil akhir/final yield (YF), performance ratio (PR), serta efisiensi sistem yang merupakan parameter-paremeter kinerja suatu PLTS. Sehingga perlu dilakukan analisis terkait kinerja PLTS Off-Grid 1 kWp di STT-PLN, agar dapat pula diketahuisistemoperasidankendala-kendala yang terjadipada PLTS Off-Grid 1 kWp di STT-PLN. Untuk mengetahui parameter kerja dari Off-Grid 1 kWp di STT-PLN maka dilakukan penelitian sebelum dan sesudah maintenance PLTS. Dimana hasil akhir/final yield (YF), performance ratio (PR) sebelum maintenance sebesar 1.71343 Wh/Wp.hari ;51,78 %. Sementara setelah maintenance sebesar 3.10121 Wh/Wp.haridan79,29 %. Dari penelitian ini juga didapatkan efisiensi sistem PLTS Off-Grid 1 kWp di STT-PLN secara keseluruhan sebesar 80,40 %.

The Solar Power Plant Off-Grid 1 kWp at STT-PLN is one of the power plants built at STT-PLN to support renewable energy research, especially solar power generation. Since the solar power plant Off-Grid 1 kWp in STT-PLN has not yet known the optimum potential of electrical energy, the final yield (YF), the performance ratio (PR), and the efficiency of the system which is the parameters of a plant's performance Solar power. It is therefore necessary to analyze the performance of the solar power plant Off-Grid 1 kWp in STT-PLN, in order to know the operating system and the constraints that occur in the solar power plant Off-Grid 1 kWp in STT-PLN. To know the working parameters of Off-Grid 1 kWp in STT-PLN then do the research before and after maintenance of solar power plant. Where final yield (YF), performance ratio (PR) before maintenance is 1.71343 Wh / Wp.day; 51.78%. While after maintenance of 3.10121 Wh / Wp.day; And 79.29%. From this research also obtained the efficiency of Off-Grid 1 kWp solar power system in STT-PLN as a whole by 80,40%.