JAKARTA, July 24 (Reuters) - Indonesia, the world's biggest 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 executed, the B40 mandate might increase biodiesel usage to as much as 16 million kilolitres (KL) next year, the ministry stated, from 13 million KL estimated to be consumed in 2024.

"We hope the trials could be completed in December, so that complete execution 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 market had the capability to meet B40 need, with installed capability anticipated to rise to 20 million KL yearly next year from 18 million KL now.

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

The biodiesel market would require 13.9 million metric lots of crude palm oil to produce 16 million KL biodiesel next year, from the estimated 11 million tons needed this year, he added.

Indonesia's greatest palm oil association GAPKI said a decline in exports implied there would suffice raw materials to supply the B40 required in the meantime.

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

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

The had actually tested the biodiesel, blended with 40% of palm oil, on a train for the very first time previously this week, while planning to check the B40 mix on agriculture machinery, power plants and in the shipping market, it said. (Reporting by Bernadette Christina and Dewi Kurniawati; Writing by Stanley Widianto; Editing by John Mair, Savio D'Souza and Barbara Lewis)