BUY Dependable New & Used Commercial Backup Generators 250 kW GENERATORS FOR SALE

250 kW Generators for Warehouses, Office Buildings, Industrial Facilities, and More

A 250 kW generator has the capacity to power a wide range of equipment and systems, including small office buildings, small commercial manufacturing operations, hospitals, retail stores, and large warehouses. It can provide enough power to keep basic functions and machinery running, such as air conditioning, refrigeration, elevators, lighting, and computers. With the right combination of load control and peak shaving features, a 250 kW generator can provide reliable power during peak times of demand. Additionally, it can provide backup power in case of natural disasters or unexpected power outages.

Integrated Fuel Tanks Change the Runtime Math at This Size

Once generators reach the 250 kW class, integrated fuel tank capacity becomes a bigger factor in day-to-day operations than it is on smaller units. A larger built-in tank means longer stretches between refueling — which matters more the moment a generator is actually running a facility rather than just idling on standby. Warehouses, hospitals, and manufacturing operations weighing a 250 kW unit should factor tank size into the decision alongside kW output, since it directly affects how much hands-on attention the generator needs during an extended outage.

Assessing Requirements for a 250 kW Installation

For a 250 kW purchase, write down the site’s voltage and phase first: a 480V three-phase plant and a 208V building draw different current for the same kW. Then total the loads that run together and add margin for future equipment. Entering those loads into our power calculator first can focus the conversation with a specialist. The amperage chart has a 250 kW row (3 phase, 80% power factor, 312 kVA) listing 866 A at 208V and 376 A at 480V.

Why Tank Choice Defines Fuel Planning at 250 kW

This is the size where integrated tank choice and gas line pressure both become line items in the project.

• Diesel: The diesel fuel consumption chart puts a 250 kW generator at 5.7 gal/hr at 1/4 load, 9.5 at 1/2, 13.6 at 3/4, and 18 at full load, as estimates. Generac’s SD250 has an 8.7 L engine, is rated 250 kW (313 kVA) standby and 225 kW prime, and lists 5.5, 10.4, 14.8, and 18.5 gal/hr at standby. Its usable tank sizes run from 153 gallons (8 hours) through 372 (20), 500 (27), 589 (31), 693 (37), 946 (51), and 1,000 (54) up to 1,325 gallons (71 hours).
• Natural gas: Generac’s SG250 uses a 13.3 L engine rated 250 kW standby with no prime rating given. It lists 2,145 cubic feet per hour at half load and 3,446 at full load, and needs 11 to 15 inches of water column at the generator, a higher pressure than the 7 to 11 inches on the SG200. The diesel chart does not apply to it.

Filter your search by fuel through industrial diesel generators or industrial natural gas generators.

Skid or Trailer: Weights for 250 kW Mobile Packages

Atlas Copco’s QAS 250 JD T4F shows what a towable at this size looks like. At 60 Hz it is rated 200 kW prime (250 kVA) and 220 kW standby (275 kVA) on 385 gallons of fuel, burning 4.62, 7.45, 10.16, and 14.11 gal/hr from 1/4 to full load, which is 33.3 hours at 75% load. On its trailer it weighs 13,405 lb with fluids, against 11,735 lb on a skid, and measures 218 x 94 x 109 inches. The trailer has dual heavy-duty torsion axles with electric brakes, and the sheet lists an 800 A main breaker, a John Deere 6068HFG06 engine certified to Tier 4 Final, and 73 dB(A) at 23 ft at 75% load. It gives no GVWR, so get that figure and your state’s towing rules in hand before you move one. Find towable units under trailer-mounted generators.

Why the Built-In Tank Matters to a 250 kW Quote

A few choices account for most of the spread in 250 kW prices.

• Condition: new generators and used generators sit at different price points, and hours and age move a used unit’s price.
• Integrated tank: The SD250 offers eight tank sizes, 153 to 1,325 gallons, and a larger tank adds cost along with runtime.
• Rating basis: Generac rates the SD250 at 250 kW standby and 225 kW prime, the SG250 at 250 kW standby only, and the QAS 250 at 220 kW standby and 200 kW prime.
• Engine: The diesel SD250 runs an 8.7 L engine, the gas SG250 a 13.3 L engine, and the QAS 250 a John Deere engine certified to Tier 4 Final.
• Breaker and mounting: Main breaker size, skid versus trailer, and delivery distance change the total.

To price a 250 kW unit, contact us and tell us which one.

Rapid Transfer and Minimal Downtime at 250 kW

Sites at 250 kW often run process equipment, refrigeration or HVAC plant that cannot simply be shut off. The generator’s job is to restart those loads on its own once the transfer switch calls for power.

Office, Retail, or Plant: Placing 250 kW

• A single small-to-mid office building or retail location → our 200 kW generator likely covers it for less
• A hospital wing, warehouse, or mid-size manufacturing operation → 250 kW is a common landing point
• A larger manufacturing plant or multi-building facility → step up to our 300 kW generator for extra margin

Service After Delivery for 250 kW Sets

At 250 kW the generator is built for heavy-duty industrial and commercial use, with ample capacity for a variety of needs and the durability to run in challenging environments. Helping customers find a fitting generator has been our job for over ten years. A 250 kW unit from us has passed a 22-point inspection, comes with the 30-day IronClad warranty, and can be serviced by our service and maintenance team. See the inventory or send us a message if you need help choosing.

Where 250 kW Sits in the Turnkey Industries Range

Across our lineup, 35 kW units serve small offices and retail shops, and 3,000 kW generators power large industrial complexes and data centers. The 250 kW generator for sale sits in the middle, suited to mid-sized manufacturing, larger office buildings and backup power for hospitals. From temporary power to industrial systems, our team can guide you to the generator that matches your requirements.