JAKARTA, July 24 (Reuters) - Indonesia, the world's greatest palm oil producer, is evaluating fuel with a view to increasing to 40% from 35% the share of palm-oil combined into biodiesel next year, the energy ministry stated.

If executed, the B40 required might increase biodiesel usage to as much as 16 million kilolitres (KL) next year, the ministry said, from 13 million KL estimated to be consumed in 2024.

"We hope the trials might be finished in December, so that full implementation of B40 could be carried out in 2025," energy ministry senior main Eniya Listiani Dewi stated in a statement on Tuesday.

The Indonesian Biofuel Producers Association (APROBI) said the industry had the capability to fulfill B40 demand, with set up capacity anticipated to increase to 20 million KL annually next year from 18 million KL now.

"However we will require more raw products to meet B40 demand," Ernest Gunawan, the secretary general of APROBI told Reuters on Wednesday.

The biodiesel industry would need 13.9 million metric heaps of crude palm oil to produce 16 million KL biodiesel next year, from the estimated 11 million loads required this year, he included.

Indonesia's biggest palm oil association GAPKI stated a decrease in exports implied there would be enough raw products to supply the B40 required for now.

But the market would require to assess "which one would be better", GAPKI chairman Eddy Martono stated, referring to the possibility an increase in exports would make providing the domestic market less viable.

Indonesia's palm oil output is approximated to reach 54.4 million heaps in 2024, a 2.26% increase from in 2015, while exports are anticipated to decline by 2.47% to 29.5 million loads as domestic usage rose, driven by biodiesel required.

The ministry had evaluated the biodiesel, combined with 40% of palm oil, on a train for the very first time previously today, while preparing to evaluate the B40 mix on farming machinery, power plants and in the shipping industry, it stated. (Reporting by Bernadette Christina and Dewi Kurniawati; Writing by Stanley Widianto; Editing by John Mair, Savio D'Souza and Barbara Lewis)