Ram Power Corp.

Despite terrific share price appreciation over Q1 2011 for many clean energy companies, as demonstrated in our Saturday list of the TOP 20 performing companies in the EnergyBoom Clean 100 Index, not all companies in the sector ended the quarter with happy shareholders.

Here are the 10 worst-performing companies on the EnergyBoom Clean 100 Index January 3 through March 31:

Shares of Ram Power, Corp. (TSE: RPG.TO) were trading marginally lower at mid-session today after falling 20 percent Monday on news that the Reno, Nevada-based geothermal power developer is facing construction delays and additional costs related to its San Jacinto project in Nicaragua.

EnergyBoom’s E•B Biofuel subindex decline of 0.99 percent last week was the best performance among the EnergyBoom clean sector indices. It also beat the leading green ETFs  and all broad market indices except the Dax Index of 30 bluechips trading on the Frankfurt Stock Exchange, which slipped 0.24 percent. 

If geothermal power achieves its potential to become a significant contributor to the economy’s transition from fossil fuels to cleaner power, the best performers among these pure-play publicly traded companies will make their shareholders a lot of money: Ormat Technologies, Inc. (NYSE:ORA), Ram Power Corp. (TSE: RPG), Magma Energy Corp. (CVE:MXY), Nevada Geothermal Power Inc. (OTC:NGLP), and U.S. Geothermal Inc. (AMEX: HTM).