Power-One (Nasdaq: PWER) reported earnings on May 2. Here are the numbers you need to know.

The 10-second takeaway
 For the quarter ended March 31 (Q1), Power-One beat expectations on revenues and exceeded expectations on earnings per share.

Compared to the prior-year quarter, revenue dropped. Non-GAAP earnings per share shrank to a loss. GAAP earnings per share dropped to a loss.

Margins shrank across the board.

Revenue details
 Power-One chalked up revenue of $204.6 million. The 10 analysts polled by S&P Capital IQ expected to see sales of $188.9 million on the same basis. GAAP reported sales were 9.4% lower than the prior-year quarter's $225.7 million.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
 EPS came in at -$0.02. The seven earnings estimates compiled by S&P Capital IQ averaged -$0.04 per share. Non-GAAP EPS were -$0.02 for Q1 compared to $0.03 per share for the prior-year quarter. GAAP EPS were -$0.06 for Q1 against $0.03 per share for the prior-year quarter.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Margin details
 For the quarter, gross margin was 18.6%, 580 basis points worse than the prior-year quarter. Operating margin was 0.1%, 810 basis points worse than the prior-year quarter. Net margin was -3.5%, 570 basis points worse than the prior-year quarter. (Margins calculated in GAAP terms.)

Looking ahead
 Next quarter's average estimate for revenue is $215.4 million. On the bottom line, the average EPS estimate is $0.03.

Next year's average estimate for revenue is $890.0 million. The average EPS estimate is $0.16.

Investor sentiment
 The stock has a four-star rating (out of five) at Motley Fool CAPS, with 560 members out of 602 rating the stock outperform, and 42 members rating it underperform. Among 98 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 84 give Power-One a green thumbs-up, and 14 give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Power-One is hold, with an average price target of $4.81.

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