Denyo DCA‑45SPH soundproof diesel generator. It belongs to Denyo’s 45 kVA class (DCA‑45).
Key Specs:
• Continuous output: approx. 37 kVA (50 Hz) / 45 kVA (60 Hz)
• Standby output: approx. 39 – 49 kVA  
• Engine: Likely an Isuzu BB‑4JG1T (3.059 L, 4-cylinder, turbocharged), or sometimes Kubota V3800 depending on variant   
• Fuel tank: ~ 100 L
• Fuel consumption (approx): 6–7 L/hr at 75% load  
• Dimensions: roughly 1,900–2,000 mm long × 880 mm wide × ~1,250 mm high
• Weight: approximately 960–1,190 kg depending on model variant   
• Noise level (at 7 m): 58–61 dB at full load (depending on frequency)  
• Features:
• Brushless rotating exciter alternator with AVR for stable voltage (±1.5 %)  
• Dual voltage capability
• Isochronous electronic governor
• Optional parallel operation capability (on higher models)  
The Japanese control panel DCA‑45SPH.