10. Active Power ( ACPW) makes products that deliver continuous clean power to protect customers from voltage fluctuations.

Revenue in the first quarter was $17.3 million, up 56% from a year earlier. During the quarter, the sale of 31.2 megawatts of critical power systems increased revenue per megawatt to $480,000, vs. $414,000 per megawatt on total sales of 23.6 megawatts. Notably, 64% of the orders received since the beginning of 2011 were from new customers, while existing customers accounted for the balance, 36%. Meanwhile, net loss narrowed to $1.1 million, or 1 cent per share, as compared to $2.6 million, or 4 cents per share, in the year-ago quarter.

Heading into the second quarter of 2011, the company expects revenue in the range of $17 million to $20 million, growing 6% to 25% from the second quarter of 2010. Earnings per share are expected to range between a loss of 1 cent to a gain of 1 cent.

All the three analysts covering the stock recommend a buy. As such, there are no sell ratings on the stock. Analysts polled by Bloomberg forecast an average 12-month price target of $2.9, nearly 22% higher than the stock's current price.

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