Key TakeawaysEnphase Energy indicated that the drop in demand for solar power in the U.S. may be over.The solar power equipment maker had a gain in sell-through in the U.S., and said its business in the key California market has stabilized.Enphase Energy reported second-quarter profit and sales that missed estimates. Enphase Energy (ENPH) was the best-performing stock in the S&P 500 Wednesday, a day after the solar power equipment maker suggested the slump in demand in the U.S. is likely over. Chief Executi ...