Just recently, the government has pledged to stop the construction of new CFPPs and to retire around 5.5 GW of the existing units. By doing so, renewables can be integrated more into Indonesia’s generation mixture. The retirement plan may be very well suited for aging and inefficient units. Yet for young and just recently in operation, the plan, despite positively impacting renewables share in the generation mix, would bring financial and legal problems, especially to the state-owned utility company, PLN, which acts s a single off-taker from these power plants. Hence, as a temporary measure, the CFPPs can be operated flexibly as the middle-ground to reduce the power plants’ utilization as well as reduce the losses, whilst at the same time allowing further penetration of the renewables. This report aims to provide a holistic analysis surrounding the operation of a flexible coal-fired power plant (CFPP).