The photovoltaic (PV) tracker market in North America increased by 135 percent year over year to reach 5.5 gigawatt (GW) shipments in 2015. Raising its market share by 22 percentage points over 2014, NEXTracker moved ahead of Array Technologies, becoming the leading supplier of PV trackers last year. Despite Array Technologies dropping to second place in the rankings, the company increased its market share and continued to increase unit shipments by a factor of 2.5, according to IHS Inc. (NYSE: IHS), the leading global source of critical information and insight.

"Leading module producers like First Solar and SunPower remained in the top five rankings in 2015, thanks to their large ground-mount utility-scale pipeline, "said Camron Barati, North America solar analyst for IHS Technology. "SunPower's market share loss can be attributed to lumpiness of the company's utility-scale development business, which greatly affected its single-axis tracker shipments."

Because of its involvement in the large OCI Solar Power PV project in Texas, Sun Action Trackers was the only leading dual-axis tracker supplier to enter the top-five ranking in 2015. However, in response to the rapid adoption of single-axis trackers, the company also released a single-axis tracker in 2015. 

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