The call is a change in strategy the trader who had been long Guggenheim Solar. The exchange-traded fund holds shares of both U.S. and international companies and seeks to track the performance of the MAC Global Solar Energy Index. The fund has enjoyed a nice run, up 17 percent on the year, more than double the return of the broader S&P 500.
But Brown said that now is the time to take profits, noting that the ETF has started to struggle in the last month because of its Chinese components.
Brown said that he is focusing on U.S. plays, with his top pick being Arizona-based First Solar.
"It has the biggest backlog in the industry, plays in both utility scale power projects as well as commercial and residential," he said, adding, "General Electric owns a piece of the company, and that affiliation is helping them win huge business together."
Brown made his moves as part of the "Halftime Report Playblook Playoffs"—a stock competition among the show's seven regular traders. Each was given a hypothetical portfolio of $100,000 and the opportunity to make 10 trades throughout the year.
Brown is in fifth place and said that he thinks this move will add some needed beta to his portfolio.
—By CNBC's Katie Young