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ACCRUED WARRANTY COSTS
 12 Months Ended
Dec. 31, 2012
ACCRUED WARRANTY COSTS  
ACCRUED WARRANTY COSTS

12. ACCRUED WARRANTY COSTS

        The Company's warranty activity is summarized below:

 
   2010   2011   2012  
 
   $
   $
   $
  

Beginning balance

     16,899,522     31,224,906     47,021,352  

Warranty provision

     14,707,513     18,347,272     12,516,349  

Warranty costs incurred

     (382,129 )   (2,550,826 )   (1,203,277 )
               

Ending balance

     31,224,906     47,021,352     58,334,424