Indonesia, a developing country situated at the convergence of four tectonic plates, is highly vulnerable to natural disasters such as earthquakes, tsunamis, volcanic eruptions, and landslides. These geological conditions result in frequent disruptions, particularly affecting access to electricity in disaster-hit areas. Reestablishing power supply is often delayed due to logistical challenges. Therefore, alternative energy solutions are essential to provide immediate and reliable power during emergencies. One practical and sustainable option is the use of Solar Power Plants (PLTS), which rely solely on sunlight and produce clean energy with minimal carbon emissions. The earth’s surface can receive up to 1,000 Watts per square meter under ideal weather, making solar energy a viable solution. PLTS systems offer flexibility and can be adapted in mobile formats. This study proposes the design of a Mobile PLTS system suitable for use in disaster operations led by BASARNAS (National Search and Rescue Agency). Data were collected from BNPB, BMKG, BASARNAS, and NASA, focusing on geographical characteristics, solar radiation levels, and the dimensions of BASARNAS Mobile Trucks. The study aims to determine suitable system specifications, equipment needs, and potential energy output. The results show that the proposed Mobile PLTS system requires 20 solar panels (each 300 Wp), with an average energy production of 27.70 kWh. The system includes 16 batteries for energy storage. Additionally, the mobile unit design allows space for transporting logistics and essential tools, making it a multifunctional and strategic solution for disaster response in Indonesia.