** Shares of Australia's Frontier Energy FHE.AX fall as much as 5.8% to A$0.245, their lowest level since September 17
** The renewable energy co says it will raise A$11.5 million ($7.62 million) via placement at an issue price of A$0.25 per share
** Issue price represents a discount of 3.8% to stock's last closing
** Funds from placement to help co complete debt financing process, others
** Stock has risen 108.3% this year, including day's moves
($1 = 1.5097 Australian dollars)
(Reporting by Roshan Thomas in Bengaluru)
((Roshan.Thomas@thomsonreuters.com))