Choosing a 330 kVA Diesel Generator Set for Business Backup

When a business needs 300 to 350 kVA of standby capability, the engineering conversation usually starts with a question: how much power will actually be running, and for how long? The Doosan P126TI II in this 330 kVA configuration answers both sides of that question clearly, because the set is rated at 330 kVA standby (271 kW) and 300 kVA prime.

Standby vs prime: why the distinction matters

Standby power is the headline figure because it describes the short-term peak a machine must deliver when the mains supply fails — typically for the seconds it takes a transfer device to move the load over. Prime power is the continuous rating for long-running generation, which is the number a contractor planning eight-hour site shifts or a rental company running equipment overnight will size around. A set with 330 kVA standby and 300 kVA prime gives buyers a comfortable margin for both scenarios: bridging an outage with critical loads, or running as a primary power source on a project where no grid connection exists.

Engine, alternator and control

The engine is the Doosan P126TI II, matched with a Stamford alternator and rated at 400 V, 50 Hz, three-phase output. The control panel is a Datakom D300, and the equipment list includes an ATS, AVR, circuit breaker, emergency stop, fuel level indicator, battery with charger, coolant heater and lifting lugs. For a buyer, the ATS and AVR are the two items worth noting most: the ATS automates the transfer of load between grid and generator, while the AVR regulates voltage stability under varying load conditions.

Fuel planning and run time

Fuel consumption is listed at 31.3 L/h at 75% load, and the tank holds 450 L. Simple arithmetic gives a useful planning figure — around 14 hours of running at that specific load point before refuelling is required, though real-world endurance depends on load profile, ambient temperature and how often the machine is running near that level. For sites with limited fuel delivery, or for rental fleets where the tank is the only buffer, that calculation is worth doing before the set is shipped.

Acoustic considerations

At 68 dB(A) measured at 7 metres, the silent enclosure is a genuine advantage in urban and semi-urban applications: hospital auxiliaries, retail premises, residential compounds, event power and construction sites close to occupied buildings. Noise is frequently the deciding factor in approval from local authorities or neighbours, and a sound-rated enclosure makes the permitting conversation considerably easier.

Physical and export details

The set weighs 2,165 kg and measures 4,100 x 1,200 x 1,930 mm, a footprint consistent with a packaged silent unit that can be handled by standard lifting lugs. Every machine is tested in the GEC workshop before delivery, and export handling — loading, worldwide shipping by road, sea or air, and the full document set — is managed in-house.

A note on condition and pricing

This particular unit is listed as new, built in 2019, and priced at EUR 22,000 excluding VAT, with the set located in Istanbul. On the used market, a nearly-new machine of this specification with an established engine and alternator brand is often a rational choice for buyers who need reliable capacity without a brand-new capital outlay. If you would like a quotation or details on other available configurations, talk to Mehmet Demirli, our Sales & Purchase advisor.

Where this power band typically sits

In practice, 300–330 kVA is the working range for mid-sized construction sites, small industrial plants, agricultural irrigation, data centre auxiliary loads, and event or exhibition power. Rental companies use this class for mixed equipment fleets. Buyers usually arrive knowing their load list and need a partner who can confirm the sizing rather than sell the largest available box.

That is the role of an advisor. Contact GEC Generator Export Center for a technical discussion on this model or alternatives in the same class.