The Kohler GN-521B-ES diesel generator datasheet provides specifications, features, dimensions, and compliance details for the 3.5 kVA and 5 kVA models.
The GN-521B-ES is a portable, compact diesel generator set offered by Kohler, designed for prime power applications where utility power is unavailable or unreliable. It delivers 3.5 kVA (model KDG0004P2) or 5 kVA (model KDG0005P2) with a 10% overload capacity for one hour, and meets ISO‑8528/1 and ISO‑3046/1 standards.
The generator combines a natural‑aspirated KD441‑GSI2 diesel engine with a single‑bearing alternator, featuring an advanced digital controller (ADC2000) and optional automatic Mains Failure (AMF) control. Detailed specifications cover engine displacement, fuel consumption, emissions compliance (CPCB‑II), dimensions (960 mm × 660 mm × 789 mm), and dry weight (203 kg for 3.5 kVA, 209 kg for 5 kVA).
| Engine Model | KD441‑GSI2 |
|---|---|
| Displacement | 0.44 L (26.85 cu in.) |
| Bore × Stroke | 86 mm × 76 mm (3.38 in × 2.99 in) |
| Compression Ratio | 20.3:1 |
| Rated Speed | 3000 rpm |
| Fuel Consumption @ 100% Load | 0.8 L/h (3.5 kVA) / 1.4 L/h (5 kVA) |
| Fuel Tank Capacity | 15 L |
| Dry Weight | 203 kg (3.5 kVA) / 209 kg (5 kVA) |
| Overall Dimensions (L×W×H) | 960 mm × 660 mm × 789 mm |
Both the 3.5 kVA and 5 kVA versions have a 15 L fuel tank.