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

If executed, the B40 mandate could 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 might be completed in December, so that complete application of B40 might be brought out in 2025," energy ministry senior main Eniya Listiani Dewi stated in a declaration on Tuesday.

The Indonesian Biofuel Producers Association (APROBI) stated the market had the capability to fulfill B40 demand, with installed capability expected to increase to 20 million KL every year next year from 18 million KL now.

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

The biodiesel industry would require 13.9 million metric lots of unrefined palm oil to produce 16 million KL biodiesel next year, from the approximated 11 million tons needed this year, he included.

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

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

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 decrease by 2.47% to 29.5 million tons as domestic usage increased, driven by biodiesel required.

The ministry had actually evaluated the biodiesel, blended with 40% of palm oil, on a train for the very first time earlier this week, while preparing to evaluate the B40 mix on farming equipment, power plants and in the shipping industry, it said. (Reporting by Bernadette Christina and Dewi Kurniawati