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ACCRUED WARRANTY COSTS (Details) (USD $)	12 Months Ended
ACCRUED WARRANTY COSTS (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ACCRUED WARRANTY COST
Beginning balance	$ 47,021,352	$ 31,224,906	$ 16,899,522
Warranty provision	12,516,349	18,347,272	14,707,513
Warranty costs incurred	(1,203,277)	(2,550,826)	(382,129)
Ending balance	$ 58,334,424	$ 47,021,352	$ 31,224,906

Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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