30kW Diesel Generator Set
30 kW Prime / 33 kW Standby — 38 kVA
Available with Cummins engines. ISO 8528-5 certified, factory-direct from China since 1983, exporting since 2003.
What Can a 30kW Diesel Generator Power?
30kW diesel generators cover small commercial and light-industrial backup and prime-power needs. Typical uses include small retail stores, restaurants, small offices, telecom base stations, and light-duty construction tools where the grid is unreliable or absent.
30kW Diesel Generator — Engine Options
One engine platform is available at 30kW. Choose based on your application, budget, and service requirements.
Cummins 30kW Diesel Generator
Model: R-DC40D5/S · 50Hz (1500 rpm)
| Standby Power | 33 kW / 42 kVA |
| Prime Power | 30 kW / 38 kVA |
| Engine Model | 4BT3.9-G1 |
| Alternator | Stamford S1L2-K1 / Leroy-Somer TAL-A42-E |
| Fuel Consumption | 6.1 / 8.2 L/h (@75% / @100%) |
| Fuel Efficiency | 229 g/kW·h (ISO 3046-1) |
| Sound Level | ≤75 dB(A) at 7m |
| Dimensions (Open / Silent) | 1700×850×1300 / 2510×980×1340 mm |
| Weight (Open / Silent) | 800 / 1050 kg |
| Frequency | 50Hz (1500 rpm) |
💰 Operating Cost Estimate
75% Load
6.1 L/h
100% Load
8.2 L/h
Operating cost = L/h × local diesel price.
Example at $1.0/L: 75% load ≈ $6/hr.
🛢️ Maintenance Quick Reference
Oil Capacity
10.9L
SAE 15W-40 CH-4
Coolant Capacity
7.2L
50:50 EG + H₂O
Global service network — ideal for critical standby in data centers and hospitals.
View Cummins Series →Nearby ratings: Also available: R-DC30D5/S — Prime 24 kW / Standby 27 kW · R-DC50D5/S — Prime 40 kW / Standby 44 kW.
30kW Generator — Quick Comparison
This model is rated 30 kW Prime / 33 kW Standby at 50Hz (1500 rpm), with a Stamford / Leroy-Somer alternator and DSE4620 controller. Key differences below.
| Specification | Cummins |
|---|---|
| Model | R-DC40D5/S |
| Engine | 4BT3.9-G1 |
| Fuel @75% (L/h) | 6.1 |
| Fuel Efficiency (g/kW·h) | 229 |
| Dimensions — Open (mm) | 1700×850×1300 |
| Weight — Open / Silent (kg) | 800 / 1050 |
| Oil Capacity (L) | 10.9 |
| Coolant Capacity (L) | 7.2 |
Frequently Asked Questions — 30kW Diesel Generator
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