JFP 40kW (50kVA) Silent Cummins Diesel Generator Set with Stamford Alternator/Leroy Somer Alternator JFP 40kW (50kVA) Silent Cummins Diesel Generator Set with Stamford Alternator Product Overview This 40kW (50kVA) silent diesel generator set is assembled with a genuine Cummins industrial diesel engine and an original Stamford brushless alternator, equipped with a heavy-duty integrated soundproof canopy. It is engineered to deliver stable, clean, and low-noise power for both