Generac Introduces SD1250 & SD1500 Diesel Generators: Smarter Solutions for Mission-Critical Power Applications Accessibility StatementSkip Navigation Generac's new 46-liter diesel generators feature a powerful Perkins 5012 engine optimized for improved fuel efficiency, reduced emissions and unmatched reliability for mission-critical environments. WAUKESHA, Wis., March 18, 2026 /PRNewswire/ -- Generac Holdings Inc., (NYSE: GNRC), a leading global designer, manufacturer and provider of energy technology solu ...