Jokowi, as the president is commonly known, said companies have invested 14 trillion rupiah ($860 million) so far.
Now another 400 hectares will be offered for investors to will create manufacturing jobs, Jokowi said.
“We have to open as many jobs as possible for our people,” he said.
Companies investing in the Batang park can get tax breaks for imports of machinery, according to tax rules on industrial parks.
LG Energy Solution will start producing cathode in September, an essential component for electric vehicle batteries, Jokowi said.
He previously said the company would build a $2.4 billion factory in the Batang park to produce 220,000 tonnes of precursor and 42,000 tonnes of cathode per year.
That would provide the main raw material for its planned 200 gigawatt-hours battery cell plant in the industrial town of Karawang in West Java, worth $3.6 billion, he said.
($1 = 16,285.0000 rupiah)
(By Stanley Widianto and Stefanno Sulaiman; Editing by Ros Russell)