Indonesia is developing usage of solar energy to fulfill increasing demand on electricity, an official said here on Wednesday. Director General for New and Renewable Energy at the Ministry for Energy and Mineral Resources Kardaya Warnika told a parliamentary hearing that currently, a small capacity of solar power plant is developed for small scale. \"We are developing solar energy with capacity of 15 kilowatt that is enough for 100 households,\" said Warnika. He added that the government is composing a regulation on the usage of solar energy. \"For example, related to the usage of thousands hectare of land, certainly that they are not productive ones. As for now, we don\'t install solar energy equipment in productive lands,\" said Warnika.