For solar energy companies, there was hardly a cloud in the sky on Tuesday. During trading during the day, solar panel stocks skyrocketed as billionaire Elon Musk took a moment away from Tesla and SpaceX to announce an acquisition on behalf of his SolarCity. In a blog post, Musk -- SolarCity's largest shareholder and chairman -- along with the CEO and CTO said that the company has agreed to buy Silveo, a solar panel manufacturing company. The purchase, which could be worth up to $350 million in stock, immediately turns SolarCity into a panel maker for the first time. It also sent a jolt of energy into SolarCity stock. Shares finished the day up over 17.5%. Other solar stocks surged on the news as well. Yingli Solar, the Chinese company which is the world's largest solar panel manufacturer, jumped over 12% on the day.