JAKARTA, July 24 (Reuters) - Indonesia, the world's biggest palm oil producer, 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 implemented, the B40 mandate might increase biodiesel intake to up to 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 completed in December, so that complete implementation 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) said the industry had the capacity to fulfill B40 need, with installed capability anticipated to increase to 20 million KL yearly next year from 18 million KL now.

"However we will require more basic materials to satisfy B40 need," Ernest Gunawan, the secretary general of APROBI told 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 estimated 11 million lots required this year, he included.

Indonesia's biggest palm oil association GAPKI stated a decline in exports indicated there would suffice raw products to supply the B40 mandate in the meantime.

But the industry would require to evaluate "which one would be better", GAPKI chairman Eddy Martono stated, describing the possibility an increase in exports would make providing the domestic market less practical.

Indonesia's palm oil output is approximated to reach 54.4 million loads in 2024, a 2.26% increase from in 2015, while exports are expected to decrease by 2.47% to 29.5 million loads as domestic consumption increased, driven by biodiesel required.

The ministry had evaluated the biodiesel, blended with 40% of palm oil, on a train for the very first time previously today, while planning to evaluate the B40 mix on farming equipment, 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)