What happened Shares of solar manufacturer JinkoSolar Holdings (NYSE: JKS) jumped as much as 19.2% in early trading Tuesday, after the company reported third-quarter 2019 results. Shares ended the day up 10.6%, after trading steady for most of the afternoon. So what Total shipments were down 1.8% to 3,386 megawatts (MW) in the quarter, but revenue was up 8.2% to $1.05 billion. Gross margin was also up from 14.9% a year ago to 21.3%, driving net income of $50.9 million for the quarter. Image source: Getty Images. The financial improvement has been driven by the upgrade of equipment to mono wafer capacity, which is expected to drive nearly 100% mono-based solar module shipments in 2020. Higher-efficiency products are commanding higher prices, and that's what's leading to better results. Now what Solar manufacturers see ups and downs in their performance depending on how commodity component and panel prices trend, and last quarter the trends worked in JinkoSolar's favor. The only worry investors should have is that other manufacturers are also upgrading capacity to produce mono wafers and mono PERC solar panels, which are becoming the industry standard. This could eventually put pressure on pricing and margins, eating into any surprise profit that investors saw today. 10 stocks we like better than JinkoSolar Holding CompanyWhen 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 JinkoSolar Holding Company 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 Travis Hoium has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source