Generators are our only business. We offer complete Sales, Service and Installation of all Commercial, Industrial and Residential Generators. Welcome to Gentech Ltd. As a Generac Authorized dealer, Gentech Ltd. of New Windsor, NY brings you peace of mind with a full line of reliable Generac products backed by world-class service and support. Explore our product selection, then contact us so we can help you select the Generac solution that's just right for you. Emergency power systems that can back up your entire home or business, or just the most essential circuits. Portable power products that let you take your electricity where you need it most, whether its a tailgate party or a construction site.