** Shares of solar power and battery company Canadian Solar CSIQ.O fall 5.2% to $11.44 premarket

** Reports Q3 loss of $14 mln vs year-ago profit of $22 mln

** "The solar industry faces significant external and internal challenges. While we have achieved relatively strong results, the outlook remains complex," CEO Shawn Qu says

** Q3 revenue falls 18% to $1.5 bln

** As of last close, stock down 53.98% YTD

(Reporting by Pooja Menon in Bengaluru)

((Pooja.Menon@thomsonreuters.com;))