Overview#
The Blue Star PD50-01 is a 50-kilowatt Tier 3 diesel standby generator built around the Perkins 1104D-44TG1, a 4.4-liter turbocharged four-cylinder engine without charge air cooling. It occupies the same 80×38 in footprint as the PD30-01IT4, making it a direct power upgrade for applications where 25 kW is insufficient but floor space is constrained.
Blue Star Power Systems (North Mankato, Minnesota) pairs the 1104D-44TG1 with a Stamford UCI224D alternator and DSE DCP7310 controller. At 2,225 lbs, the PD50-01 is notably heavier than the IT4 models below it, reflecting the larger engine and alternator package. Its outstanding altitude rating — 8,202 ft (2,500 m) at 122°F — is the highest in the Perkins PD series.
The 1104D-44TG1 at 50 kWe#
The 1104D-44TG1 is a turbocharged but non-intercooled engine. Without charge air cooling, the intake charge runs warmer, which limits the power ceiling compared to the intercooled 1104D-E44TAG2. But the simpler cooling system reduces maintenance and failure points, and the 1104D platform is extremely well-proven in generator applications globally. At 50 kWe, the engine is running comfortably within its rating.
When to spec the PD50-01#
- 40–50 kW emergency standby loads on diesel fuel
- High-elevation sites (up to 8,202 ft) where altitude derating is a concern
- Light-commercial, multi-family, and telecom applications with Tier 3 acceptance
- Competitive bids where the compact 80×38 in footprint is a constraint
Our service experience#
The 1104D-44TG1 is a high-volume Perkins engine with widespread global parts availability. Service follows the standard Perkins 1100D industrial schedule. The absence of an intercooler simplifies service — there are no intercooler hoses or charge air temperature sensors to maintain. Load bank test at commissioning to verify full-load pickup.
