The Indonesian Solar Energy Association (AESI) and Synkrona Enjiniring Nusantara (Synkrona) have formed a consortium to conduct a study assessing the feasibility of integrating as many solar power plants as possible into the Jamali (Java-Madura-Bali) grid, to replace several retired coal-fired power plants (PLTU) in the future. This initiative presents a challenge, as solar PV systems are intermittent and cannot provide the same level of constant power as coal-fired power plants.

The study evaluates the capability of the Jamali grid by running simulations using irradiance and generation data from Java and Bali. AESI and Synkrona have collaborated with PLN to install a total of 54 solar irradiance measurement devices across Java and Bali.

The measurement data is published on the web platform https://indonesiasolarmap.com and is freely available for public download.
The study concludes that the integration of 9,600 MW of rooftop PV and 4,800 MW of utility-scale solar PV is technically feasible. The intermittency of solar generation does not pose significant issues for the electrical grid, thanks to the geographically distributed locations of the solar power plants.