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

If executed, the B40 mandate might increase biodiesel usage to approximately 16 million kilolitres (KL) next year, the ministry said, from 13 million KL approximated to be consumed in 2024.

"We hope the trials could be finished in December, so that full execution of B40 could be brought out in 2025," energy ministry senior official Eniya Listiani Dewi said in a statement on Tuesday.

The Indonesian Biofuel Producers Association (APROBI) said the industry had the capability to meet B40 need, with installed capacity expected to rise to 20 million KL every year next year from 18 million KL now.

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

The would need 13.9 million metric lots of unrefined palm oil to produce 16 million KL biodiesel next year, from the approximated 11 million loads required this year, he included.

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

But the market would need to evaluate "which one would be better", GAPKI chairman Eddy Martono stated, referring to the possibility a boost in exports would make supplying the domestic market less practical.

Indonesia's palm oil output is approximated to reach 54.4 million lots in 2024, a 2.26% boost from last year, while exports are expected to decrease by 2.47% to 29.5 million tons as domestic intake rose, driven by biodiesel mandate.

The ministry had actually checked the biodiesel, combined with 40% of palm oil, on a train for the very first time previously this week, while planning to evaluate the B40 mix on agriculture equipment, power plants and in the shipping industry, it stated. (Reporting by Bernadette Christina and Dewi Kurniawati