IGBTs are utilized in automotive applications as well. The powertrain in hybrid cars are implemented with IGBTs as well as some more sophisticated applications like Piezo-injectors that are being used as ignition transistors. There are some peripheral applications for hybrid circuits like battery chargers which are also implemented with IGBTs. Solar panels and solar inverters have become a very fast growing application. Additionally, IGBTs are traditionally being used in UPSs, high power power supplies, PFCs and other switch mode power supply applications.