The payback period of a Rooftop Solar PV (PLTS Atap) system is the time it takes for electricity bill savings to cover the initial installation cost. In Indonesia, this typically ranges from 5 to 7 years, depending on factors like system size, PLN tariff, energy consumption, and solar radiation intensity. With solar panels lasting up to 25–30 years, homeowners can enjoy decades of free electricity after reaching break-even, making solar PV a profitable and sustainable investm