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"When it comes to solar stocks, there's only going to be one winner," Jim Cramer told viewers of his "Mad Money" TV show Thursday. "And that winner is

First Solar

(FSLR) - Get Report

TST Recommends

."

Cramer says it's time to start buying the stock aggressively on any weakness.

Cramer: Why We Need the Uptick Rule

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First Solar is ahead of other solar power companies because its panels, unlike other solar technologies, don't require expensive silicone in the manufacturing process.

Instead the company relies on its proprietary thin-film technology that is less expensive to manufacture and has efficiency ratings that are rapidly approaching that of its silicone-based competition, he says.

By driving down the cost per watt of their panels, the company could even someday approach that of oil or coal, he says. He also notes that First Solar doesn't need government subsidies to be profitable.

Cramer also likes First Solar because it does not sell into the volatile consumer market, choosing to instead focus almost exclusively on industrial and utility customers.

Plus, every candidate in the presidential race has endorsed solar energy, making it the perfect energy play for the long term, he adds.

Cramer likened First Solar to that of an early

Intel

(INTC) - Get Report

, which used its technology and mass market expertise to dominate the chip industry.

Cramer sees years and years of growth for First Solar, calling it "the single best way to play green energy."

Sell Bud, Buy TAP

In the "Sell Block" segment, Cramer offered a pair strategy for playing two stocks in the beer sector. He recommended selling

Anheuser-Busch

(BUD) - Get Report

and picking up

Molson Coors

(TAP) - Get Report

.

While Anheuser-Busch may hold the title of "king," Molson is the better stock, he says.

Molson's recent joint venture with SABmiller now gives the company a 29% market share. While that may pale in comparison to Anheuser's 47% share, the cost savings from the Molson-Miller combination will give the company much needed cash to grow its share.

Cramer also liked Molson for its valuation. While both companies trade at roughly 15 times 2009 earnings, Molson's 12.3% long-term growth rate makes it cheaper compared to Anheuser's 8.2% growth rate.

Cramer said Molson also deserves a higher multiple due to its international exposure: 55% of its sales are overseas compared to only 7% at Anheuser.

Go Brazil

Cramer once again turned to Brazil and recommended

CPFL Energy

(CPL) - Get Report

, the country's largest privately held utility company.

Cramer said CPFL is simply a growth story. The company currently has a lock on 13% of the national power market in Brazil, and is growing at an amazing 16% a year.

The utility plans to double its generating capacity in the next five years to meet growing demand. It's currently adding new customers at a rate of 5.2% a year.

The company is also growing through acquisition, but Cramer noted it's not willing to overpay for the assets it acquires. The company also offers a 7.8% dividend yield.

CPFL is the way to play the growing demand for electricity in Brazil, Cramer says.

Mad Mail

In this segment, a viewer asked why the market puts

Ebay

(EBAY) - Get Report

at a higher valuation than

Valero

(VLO) - Get Report

, a company with higher earnings per share.

Cramer said the markets value companies based on their future, not current, earnings. With oil margins declining, Valero is not as valuable as Ebay, a company with accelerating earnings growth.

More on RIM

In a final note, Cramer clarified his outlook on

Research In Motion

( RIMM), saying that while he still liked the stock, he needed it to come down before purchasing it again.

He also touted his recommendation of

US Steel

(X) - Get Report

at Penn State University last week. That pick is up a quick 13 points.

Image placeholder title

Lightning Round

Cramer was bullish on

El Paso Corp

( EP),

Corning

(GLW) - Get Report

and

BP

(BP) - Get Report

.

Cramer was bearish on

Intercontinental Hotels

(IHG) - Get Report

,

Pfizer

(PFE) - Get Report

,

NewMarket

(NEU) - Get Report

,

Citrix Systems

(CTXS) - Get Report

,

Dendreon

(DNDN)

,

Sandisk

(SNDK)

,

Live Nation

(LYV) - Get Report

,

Bear Stearns

( BSC)and

Fuel Tech

(FTEK) - Get Report

.

Want more Cramer? Check out Jim's rules and commandments for investing by

clicking here

.

For more of Cramer's insights during the Lightning Round, click here

.

At the time of publication, Cramer was long Corning, El Paso and BP.

Jim Cramer, host of the CNBC television program "Mad Money," is a Markets Commentator for TheStreet.com, Inc., and CNBC, and a director and co-founder of TheStreet.com. All opinions expressed by Mr. Cramer on "Mad Money" are his own and do not reflect the opinions of TheStreet.com or its affiliates, or CNBC, NBC UNIVERSAL or their parent company or affiliates. Mr. Cramer's opinions are based upon information he considers to be reliable, but neither TheStreet.com, nor CNBC, nor either of their affiliates and/or subsidiaries warrant its completeness or accuracy, and it should not be relied upon as such. Mr. Cramer's statements are based on his opinions at the time statements are made, and are subject to change without notice. No part of Mr. Cramer's compensation from CNBC or TheStreet.com is related to the specific opinions expressed by him on "Mad Money."

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Some of the stocks mentioned by Mr. Cramer on "Mad Money" are held in Mr. Cramer's Action Alerts PLUS Portfolio. When that is the case, appropriate disclosure is made on the program and in the "Mad Money" recap available on TheStreet.com. The Action Alerts PLUS Portfolio contains all of Mr. Cramer's personal investments in publicly-traded equity securities only, and does not include any mutual fund holdings or other institutionally managed assets, private equity investments, or his holdings in TheStreet.com, Inc. Since March 2005, the Action Alerts PLUS Portfolio has been held by a Trust, the realized profits from which have been pledged to charity. Mr. Cramer retains full investment discretion with respect to all securities contained in the Trust. Mr. Cramer is subject to certain trading restrictions, and must hold all securities in the Action Alerts PLUS Portfolio for at least one month, and is not permitted to buy or sell any security he has spoken about on television or on his radio program for five days following the broadcast.