Updated from 1:55 p.m. EDT

Shares of solar energy-related stocks mostly traded lower Tuesday, despite news that SunPower ( SPWRA) and Xcel Energy ( XEL) will build a solar power plant.

The two companies have signed a contract to build a 17-megawatt AC photovoltaic solar-power plant in Alamosa County, Colo.

It is the latest in a series of agreements announced by solar energy manufacturers and utilities as more states adopt standards requiring a percentage of electricity to be produced from renewable resources.

The plant, which the companies expect to complete by the end of 2010, will be the second-largest high-efficiency solar PV power plant in North America and create about 200 jobs during construction, they said in a statement.

Xcel said the plant will use SunPower tracker systems, which tilt toward the sun as it moves across the sky, increasing the amount of energy captured.

San Jose, Calif.-based SunPower's shares were down 6.7% to $22.97.

Among other solar movers Tuesday:

JA Solar ( JASO) finished down 13% to $3.06.

LDK Solar ( LDK) was down 7.4% to $6.78.

First Solar ( FSLR) closed down 3.7% to $133.12.

Canadian Solar ( CSIQ) finished down 8% to $6.45.

Suntech Power ( STP) was down 9% to $12.66.

Yingli Green Energy ( YGE) was lower by 13% to $6.31.
Copyright 2009 TheStreet.com Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed. AP contributed to this report.

If you liked this article you might like

Renewable Energy Is on the Salesman's Side

8 Bold Questions for Solar Stocks in 2012

Don't Be Fooled: Warren Buffett Doesn't Like Solar Stocks

Buffett's Second First Solar Christmas

Buffett's Second First Solar Christmas

First Solar Glad Not to Be Chinese Solar Company...We'll See