Yes "WE HAVE BEEN THROUGH ALL THIS BEFORE!" agreed.
The Wärtsilä 34DF dual-fuel engines will initially run on diesel, NOT GAS.
"The new plant will operate with five Wärtsilä 34DF dual-fuel engines. Initially they will be run on diesel fuel, but will switch to gas when the local gas supply infrastructure is sufficiently developed. In gas mode, the carbon footprint is significantly reduced thereby contributing in a meaningful way to a healthier environment."
https://www.rambuenergy.com/2017/09...g-equipment-to-a-48-mw-power-plant-in-kupang/
One of the reasons that PLN is finding it difficult to build more coal fired power stations is because the International Banks won't loan them money to build coal fired power stations. They cannot pay themselves as they're Billion$$ in debt due to the Government's refusal to put up power prices before the next election.
"Its only going to get cheaper"
RUBBISH, its only going to get more expensive.