(Solar article updated with additional background and stock price movement.)

NEW YORK ( TheStreet) -- Stocks in the solar sector heated up Wednesday as the Dow Jones industrial average surged more than 200 points.

Naturally, some solar stocks fared better than others.

Shares of China Tech Development Group ( CTDC), a Hong Kong-based manufacturer of solar energy products, led the group higher, gaining 8.2% in afternoon trading.

STR Holdings ( STRI) followed close behind, rising 7.2%. Suntech Power Holdings ( STP) jumped 6.6%, Yingli Green Energy Holding ( YGE) 5.2% and LDK Solar ( LDK) 4.7%.

Last week American depositary receipts of Trina Solar ( TSL) were upgraded by several analysts, a day after the Chinese manufacturer of solar photovoltaic products beat earnings expectations and upped its forecast for solar shipment volume.

Trina raised its capacity numbers for growth between 40% and 50%, and expects to achieve scale of 1.5 gigawatts by the end of 2011.

>> Trina Solar Forecasts Brighter Future

"Trina is speaking for the group and we've heard similar stories from all of Trina's Chinese peers and from First Solar ( FSLR) in the U.S.," Auriga analyst Mark W. Bachman told TheStreet. By reporting last in the queue of earnings reports in the sector, Trina had more time to look at future demand and was therefore the first to give a real indication that demand in 2011 will be stronger.

Bachman reiterated his buy recommendation, and upped his price target by $5 to $41 per share.

Citigroup ( C) also raised its price target on Trina Solar's ADRs by 20% to $36 per share, and reiterated its buy rating on the Chinese solar company's stock. Citi tapped Trina Solar as its "favorite" pick in the solar sector. Research firm Ardour Capital hiked its price target on Trina Solar by 23.1% to $32 per share, from $26, and reiterated its buy rating.

Shares of SunPower ( SPWRA) were upgraded by Soleil Securities to buy from hold last week, citing that "checks indicate that a large volume of system development business in the photovoltaic sector is going to be finalized in the fourth quarter of this year."

The equity research firm expects SunPower to post earnings of 90 cents per share over the next fourth months.

-- Written by Miriam Marcus Reimer in New York.

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