NEW YORK (TheStreet) -- SolarCity Corp. (SCTY) stock is down by 1.02% to $18.44 in pre-market trading on Thursday, after the company was downgraded to "equal weight" from "overweight" at Barclays. The firm lowered its price target on the stock to $20 from $49.

Earlier this week, the San Mateo, CA-based renewable energy company provided weak 2016 first quarter guidance. Additionally, SolarCity installed 272 megawatts of energy during the fourth quarter, compared to Barclays' estimates for 290 megawatts.

"The near-term growth and ability to create retained value in 2016-17 is instrumental for the residential developers given likely long-term integration head-winds as solar penetration increases in mature markets," Barclays said.

Additionally, the U.S. Supreme Court's upcoming decision on the Clean Power Plan could "temper investor sentiment for all alternative energy names," the firm added. Earlier this week, the court temporarily stopped the Obama administration's regulation of coal-fired power plants' emissions, according to the New York Times.

Barclays' top pick among solar stocks is First Solar (FSLR).

Separately, recently, TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon. Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this articles's author.

TheStreet Ratings rates this stock as a "sell" with a ratings score of D. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, generally high debt management risk, disappointing return on equity, poor profit margins and weak operating cash flow.

You can view the full analysis from the report here: SCTY

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