Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

Atlantic Power Corporation

The following table sets forth ratio of earnings to fixed charges for the periods indicated below.

	Year Ended December 31, 2011			Year Ended December 31, 2010			Year Ended December 31, 2009			Year Ended December 31, 2008		Year Ended December 31, 2007			Three Months Ended March 31, 2012
Earnings (loss) before taxes	$	(43,965	)	$	15,069		$	(54,179	)	$	34,541	$	(13,491	)	$	(55,505	)
Loss attributable to noncontrolling interest	(480		)	(103		)	—			—		—			(161		)
Distributions from equity investments	21,889			16,843			27,884			41,031		46,653			249
Fixed charges (from below)	46,051			29,361			74,498			60,984		57,523			29,069
	$	23,495		$	61,170		$	48,203		$	136,556	$	90,685		$	(26,348	)
Interest Expense
Project level interest	$	20,053		$	17,660		$	18,800		$	17,709	$	13,216		$	7,033
Corporate level interest	25,998			11,701			55,698			43,275		44,307			22,036
	$	46,051		$	29,361		$	74,498		$	60,984	$	57,523		$	29,069
Ratio of earnings	0.51			2.08			0.65			2.24		1.58			(0.91		)

Our ratio of earnings to fixed charges is computed by dividing earnings by fixed charges. For these purposes, “earnings” is the amount resulting from adding together earnings (loss) before taxes, fixed charges, and distributions from equity investments and subtracting losses attributable to noncontrolling interests. “Fixed charges” is the amount resulting from adding together project level interest and corporate level interest expenses.