What happened Shares of solar energy stock SolarEdge (NASDAQ: SEDG) closed Thursday trading down 9.8%, and its peer, solar inverter-maker Enphase Energy (NASDAQ: ENPH), declined a similar 10.2%. The reason: Both stocks were targeted in a short report from Citron Research today. So what In the course of talking up the prospects of yet a third stock -- Waukesha, Wisconsin-based power-generation equipment producer Generac Holdings (NYSE: GNRC) -- noted short-seller Citron explained how Generac "is a major new competitive entrant" in the field of solar inverters. Image source: Getty Images. Far from considering the company's newness to this market a disadvantage, however, Citron argued that "Generac ... has taken No. 1 market share in every market it enters." The implication is that it will similarly take over the market for solar inverters with ease. (Solar inverters are devices that convert direct current energy from solar arrays into alternating current electricity used by consumers). Now what Generac, says Citron, "has the resources and track record to make a huge dent in both SEDG and ENPH's market shares, but given that the company is followed by zero solar analysts, GNRC's commercial launch that was announced last week has gone completely unnoticed." Once Generac begins taking share, however, Citron predicts that SolarEdge stock will quickly tumble 33% to 34% in price to as low as $51 per share, while Enphase stock will sink 70% to 75%, falling to just $6 or $7 a share over the next six to 18 months. No wonder investors are spooked! 10 stocks we like better than Generac HoldingsWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has quadrupled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Generac Holdings wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of June 1, 2019 Rich Smith owns shares of SolarEdge Technologies. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source