By Ernest Scheyder

Oct 6 (Reuters) - BMW BMWG.DE said on Wednesday it will invest in lithium technology startup Lilac Solutions Inc to support more-efficient ways to produce the electric vehicle battery metal.

Privately-held Lilac is part of a growing number of technology developers seeking to extract lithium from saltwater brines faster, cheaper and with less water than evaporation ponds, which have long been the industry standard.

BMW, which already buys lithium from China's Ganfeng Lithium Co 002460.SZ and other traditional lithium producers, said it sees Lilac's technology as a way to boost global production of the white metal as demand grows from the EV market.

"This holds the promise of becoming a new extraction technology that allows access to more green lithium," said Kasper Sage of BMW i Ventures, BMW's venture capital fund.

The German automaker is participating in Lilac's Series B funding round alongside SK Materials Co 036490.KQ , Sumitomo Corp 8053.T investment arm Presidio Ventures and others.

BMW declined to discuss its investment amount, though the total from all investors announced on Wednesday was less than

$20 million, according to regulatory filings. T. Rowe Price and others were part of an initial $130 million funding round for Lilac's Series B announced last month.

Lilac plans to use the funds to construct a U.S. manufacturing facility for ion exchange beads, which are core to its extraction process.

The company last month agreed to use its technology

to develop a lithium project in Argentina with Lake Resources NL LKE.AX .

"Lilac has focused on proving our technology is reliable and scalable. And that's been resonating with members of the supply chain," said Dave Snydacker, Lilac's chief executive.

Lilac's peers include privately held EnergySource Minerals LLC and Energy Exploration Technologies Inc, as well as Vulcan Energy Resources Ltd VUL.AX , Standard Lithium Ltd SLL.N and E3 Metals Corp ETMC.V .

<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Australia's Lake Resources teams up with clean tech firm Lilac to develop Argentina lithium project

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(Reporting by Ernest Scheyder; Editing by Aurora Ellis)

((ernest.scheyder@thomsonreuters.com; Twitter: @ErnestScheyder;

+1-713-210-8512; Reuters Messaging: ernest.scheyder.thomsonreuters.com@reuters.net))