12. DEFERRED TAX

Deferred tax asset resulted from accrued maintenance cost on power generation systems that can be deducted for tax purposes in the future, and difference between tax and accounting basis of cost of fixed assets which was capitalized for tax purposes and expensed as part of cost of systems in accordance with US GAAP. Deferred tax liability arose from the difference between tax and accounting basis of net investment in sales-type leases.

As of September 30, 2013 and December 31, 2012, deferred tax liability consisted of the following:

	2013		2012
Deferred tax asset — noncurrent (accrual of system maintenance cost)	$	82,561	$	48,453
Deferred tax asset — noncurrent (depreciation of fixed assets)		31,456,576		22,933,886
Deferred tax liability — noncurrent (net investment in sales-type leases)		(40,735,536)		(29,547,957)
Deferred tax liability, net of deferred tax asset – noncurrent	$	(9,196,399)	$	(6,565,618)
Deferred tax liability — current (net investment in sales-type leases)	$	(2,574,083)	$	(2,471,925)