FuelCell has been on a tear in recent weeks, adding more than 100% since the beginning of March. Its first-quarter report on Monday could go some way towards justifying its valuation after FuelCell managed to curtail losses and boost sales in the three months to January. Alternative energy developers have been a hot commodity on markets after Plug Power's expanded contract with Wal-Mart sparked a rally across the sector and the use of stationary fuel cells was seen as becoming mainstream.

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