The Sunny Boy 3000TL-US / 3800TL-US / 4000TL-US / 5000TL-US / 6000TL-US / 7000TL-US / 7700TL-US are transformerless inverters, which means owners and installers benefit from high efficiency and lower weight. A wide input voltage range also means the inverters will produce high amounts of power under a number of conditions. Generate a Solar Permit Package for a design using SMA SB 5000TL-US-22 Sign up Learn More. With SolarDesignTool, you can create a design from scratch and generate a full PV permit package in as little as 15 minutes. About SMA Key Points: Offers a wide range of inverters to suit most any solar panel or system. Forefront of Inverter technology. Founded in 1981, SMA Solar Technologies is headquartered in Niestetal, Germany, and has a worldwide presence in 15 different countries including the United States and Canada.