Triton Power · TP-NG

Triton Power TP-NG350-S-K-UL

350 kW standby / 280 kW prime · Natural Gas · Liquid-cooled

350 kW natural gas generator with PSI 14.6L HO engine. UL2200 listed for commercial and industrial standby applications.

Standby power
350 kW / 280 kW prime
Voltage options
120/208V, 277/480V
Frequency / Phase
60 Hz · 3-phase
Engine
PSI 14.6L HO · 14.6L
EPA / Emissions
EPA Stationary Spark Ignition
Alternator
Leroy Somer LSA46.3

Overview#

The Triton Power TP-NG350-S-K-UL is a 350 kW natural gas standby generator powered by a PSI (Power Solutions International) 14.6L HO turbocharged inline-6 engine running at 1800 RPM. This unit is part of Triton's EPA-certified natural gas generator lineup, UL2200 listed for the US and Canadian markets. Paired with a Leroy Somer Class H insulation alternator, the TP-NG350 delivers 350 kW standby and 280 kW prime power in three-phase configuration at 120/208V and 277/480V.

The PSI 14.6L HO steps up in displacement from the 13L platform to provide the torque and thermal capacity needed for the 350 kW rating. The inline-6 configuration maintains smooth operation and accessible service points. The unit meets EPA Stationary Spark Ignition emissions standards and is rated at 64 dBA sound output, suitable for commercial and industrial installations where noise ordinances apply.

Our service experience#

At 350 kW, this unit serves larger commercial buildings, manufacturing facilities, and campuses with significant electrical loads. The PSI 14.6L is a well-established platform in the gas generation market. The inline-6 layout keeps the engine compact relative to its output, and the larger displacement compared to the 13L models provides comfortable operating margins that translate to longer service life under consistent loading.

Engineering specifications

Acoustic

Sound @ 7m, full load
64 dBA

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Estimate runtime for the Triton Power TP-NG350-S-K-UL

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

Estimate runtime on this tank

Fuel demand at 75% load

3,675,000 BTU/hr3675.0 cf/min @ 1,000 BTU/cf

On utility natural gas the runtime is generally unlimited provided the supply line and meter can deliver this BTU/hr at the engine's required inlet pressure (typically 5–14" WC residential, up to 5 psi commercial). Confirm against the OEM's published fuel-pressure spec.

Frequently Asked Questions

What is the prime vs standby rating difference on the TP-NG350?
The TP-NG350 is rated at 350 kW standby and 280 kW prime. The standby rating is for emergency backup use with limited annual runtime (typically under 500 hours/year). The prime rating of 280 kW is the continuous output for unlimited-hour applications. The wider-than-typical gap between standby and prime ratings reflects the thermal characteristics of the 14.6L engine at higher output levels.
How does the PSI 14.6L HO differ from the PSI 13L engines?
The PSI 14.6L HO is a larger displacement inline-6 engine that provides more torque headroom at the 350 kW rating compared to the 13L platform used in the 250-300 kW models. The additional 1.6 liters of displacement reduces thermal stress and improves transient response under sudden load changes, which benefits applications with motor starting loads.
What maintenance intervals apply to natural gas generators?
Natural gas generators generally follow 250-500 hour oil change intervals depending on the engine manufacturer's recommendations and oil analysis results. Spark plugs are typically inspected or replaced every 1,000-2,000 hours. Air filters, coolant, and ignition system components follow standard schedules. Natural gas burns cleaner than diesel, so there are no fuel filters to replace and less carbon buildup on engine internals.

Why we recommend Triton Power

Triton Power is our value brand for mobile and portable diesel generators, and an emerging option for industrial standby. When MQ Power's pricing is a stretch or lead times are too long, Triton delivers comparable capability at a lower price point with faster availability.

We are developing our Triton Power sales relationship and building fleet experience. Every engine platform Triton uses — Perkins, John Deere, Kubota, Scania, Volvo — is one we already service daily across other brands. Triton's open architecture means our technicians can maintain these units with standard tooling and widely available parts.

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