Overview#
The Blue Star NG300-01 is a 300-kilowatt natural gas / LP standby generator powered by the PSI 14.6L V8. It is rated 300 kWe standby / 260 kWe prime on natural gas (200 kWe standby on LP). The NG300-01 shares the same engine platform, structural steel base, and physical footprint as the NG265-01, extracting an additional 35 kWe from the same 456 bHp powerplant. At this power level, single-phase output is not offered — the NG300-01 is three-phase only.
PSI 14.6L V8 at 300 kW#
The same 891 cu in V8 that powers the NG265-01 at 265 kWe delivers 300 kWe in the NG300-01 through higher loading of the 456 bHp engine. Key specifications:
- V8 configuration — 5.04-inch bore × 5.59-inch stroke, 10.5:1 compression ratio
- 1,005°F exhaust stack temperature — slightly lower than at 265 kW standby due to different load characteristics
- Structural steel base with pad-type vibration isolation mounts
- 4,000W jacket water heater standard
Deration factors: 1.5% per 10°F above 77°F inlet air temperature; 2.5% per 1,000 ft above 1,200 ft altitude.
Alternator configurations#
The NG300-01 is three-phase only:
| Voltage | Phase | Alternator | Connection |
|---|---|---|---|
| 120/208V | 3 | Stamford S4L1D-E41 | 12-lead WYE |
| 240V | 3 | Stamford S4L1D-E41 | 12-lead DELTA |
| 277/480V | 3 | Stamford S4L1D-D41 | 12-lead WYE |
| 347/600V | 3 | Stamford S4L1S-D4 | 4-lead WYE |
All configurations carry ±0.5% voltage regulation and 125°C standby temperature rise.
When to spec the NG300-01#
- 250–300 kW standby loads on utility natural gas or LP (three-phase only)
- Large commercial, hospitality, or campus facilities needing 300 kW gaseous standby in a compact footprint
- Projects where the 300 kW LP rating of 200 kWe is the design basis
- Facilities comparing against the Cummins C300 N6 or Kohler KG300 at this kW tier
Our service experience#
The NG300-01 and NG265-01 share the same engine, base, and enclosure dimensions, making parts and service procedures interchangeable. Confirm gas supply infrastructure can support the 3-inch NPT inlet and 3,269 ft³/hr peak NG consumption before installation — this is a meaningful step up from the 2-inch inlet on the NG200-01.
