JAKARTA, July 24 (Reuters) - Indonesia, the world's greatest palm oil manufacturer, 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 implemented, the B40 mandate could increase biodiesel usage to approximately 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 completed in December, so that complete application of B40 might be brought out in 2025," energy ministry senior official Eniya Listiani Dewi said in a statement on Tuesday.

The Indonesian Biofuel Producers Association (APROBI) stated the industry had the capacity to satisfy B40 demand, with set up capacity anticipated to rise to 20 million KL every year next year from 18 million KL now.

"However we will need more basic materials to satisfy B40 demand," Ernest Gunawan, the secretary general of APROBI told Reuters on Wednesday.

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

Indonesia's most significant palm oil association GAPKI stated a decrease in exports suggested there would be adequate raw materials to supply the B40 mandate for now.

But the industry would need to assess "which one would be more important", GAPKI chairman Eddy Martono said, referring to the a boost in exports would make providing the domestic market less viable.

Indonesia's palm oil output is estimated to reach 54.4 million heaps in 2024, a 2.26% boost from in 2015, while exports are expected to decline by 2.47% to 29.5 million loads as domestic intake increased, driven by biodiesel required.

The ministry had actually evaluated the biodiesel, combined with 40% of palm oil, on a train for the very first time earlier this week, while preparing to test the B40 mix on agriculture machinery, power plants and in the shipping market, it stated. (Reporting by Bernadette Christina and Dewi Kurniawati