What is a specialty vehicle? A specialty vehicle is any vehicle that is designed for a specific function. The main purpose for a specialty vehicle is to assist the user in that particular field with specific needs. They can be a modified existing vehicle or a custom built vehicle. When building a specialty vehicle, there are many designs and configurations to consider. Generators play a major role in the performance of a specialty vehicle. Power Tech is a leader in the specialty vehicle market with our reliable and vast generator options and custom solutions for all mobile applications.