Browse Our Large Industrial Standby Generators 80 kW GENERATORS FOR SALE

80 kW Generators for Heavy Equipment, Building Systems, and More

Commercial buildings, light industrial operations and construction sites that want dependable power without a larger industrial unit are the natural home of an 80 kW set. Motors, pumps and compressors fit, with room left for lighting, computers and air conditioning.

How 80 kW Compares With Neighboring Sizes

An 80 kW set slots between our 75 kW and 100 kW generators. It fits one major system plus everyday building loads, such as a production line or large HVAC unit alongside lighting and office equipment. Buyers pick it when 75 kW leaves too little margin but several heavy systems at once are not planned.

Listing Simultaneous Loads Before Settling on 80 kW

Eighty kilowatts can cover a shop with a compressor and several motors, or a building with HVAC and lighting on one panel. List each load by running kW and by starting demand and mark which ones overlap, since only the simultaneous ones count toward the size. Use our power calculator for the arithmetic, or work with our team if your load list is more complex. For output amperage, our amperage chart lists an 80 kW generator (3 phase, 80% power factor, 100 kVA) at 278 A at 208V, 264 A at 220V, 240 A at 240V, 120 A at 480V, 96 A at 600V, and 13.9 A at 4160V.

Maker Burn Figures Versus Chart Rows at 80 kW

At 80 kW the choice is usually diesel or natural gas. Below is how the two compare at this size. Diesel keeps its fuel on site, which makes it practical where no gas main exists. Our diesel fuel consumption chart skips 80 kW. The neighboring lines list 75 kW at 2.4, 3.4, 4.6 and 6.1 gal/hr and 100 kW at 2.6, 4.1, 5.8 and 7.4 gal/hr, for 1/4, 1/2, 3/4 and full load. Treat them as diesel estimates only; they do not apply to natural gas generators. For one maker’s figures, Generac’s SD080 sheet lists 2.1, 3.7, 5.2 and 6.3 gal/hr at 25, 50, 75 and 100% load. Natural gas comes from the utility, so check pressure and flow at the meter before the unit is set. Kohler’s KG80 calls for a natural gas supply pressure of 7 to 11 in. H2O and lists 1202 cfh at 100% load. Kohler gives it the same 80 kW standby rating at 277/480V on natural gas and on LP, and its 4P10X alternator lists 275 peak motor starting kVA at a 35% dip on 480V. Pick your fuel first, then look through diesel-fueled or gas-fueled stock.

Alternator Choice for Towable 80 kW Units Running Motors

Pumps, compressors and hoists on a job site pull a surge of current when they start, so ask about alternator options as well as output when you pick a towable unit. Generac Mobile’s MDG100DF4, rated 80 kW (100 kVA) prime and 85 kW (106 kVA) standby, offers a SUPERSTART alternator as an option. Its spec sheet also lists:

• On the trailer: 170 x 69 x 80 in, 4,680 lb dry and 5,640 lb operating.
• Brakes and hitch: hydraulic surge brakes and a 3 in pintle ring as standard; electric brakes, a tandem axle and adjustable 2 in or 2-5/16 in ball hitches as options.
• Fuel and DEF: 146 gal usable fuel, good for a listed 32 hours at 75% of prime power, plus 9.1 gal of usable DEF; power comes from a John Deere 4045HFG04 meeting EPA Tier 4 Final.
• Sound: 74 dB(A) at 23 ft (7 m) at prime power.

Trailer-equipped sets are available through trailer-mounted generators.

Alternator Size: A Quiet Cost Driver on 80 kW Sets

On an 80 kW unit, motor-starting capability is a cost item in its own right. Start with the alternator, then work through the rest:

• Alternator size: Generac sells the SD080 with its standard 80 kW alternator or one of two upsized alternators. At a 30% voltage dip on 480V, starting capability goes from 176 skVA on the standard alternator to 236 and 348 skVA on the upsized ones. At a 15% dip, the standard alternator lists 88 skVA. A larger alternator is an added option on the order.
• Rating basis: The SD080 carries an 80 kW standby rating; Generac’s 72 kW prime figure for it cannot be sold as EPA-certified prime in the US.
• Fuel tank: SD080 base tanks run from 79 gal (13 hours listed) to 589 gal (93 hours listed) on the open set.
• Housing: Weather-protected, Level 1 and Level 2 sound-attenuated enclosures are offered in steel or aluminum.
• Current at your voltage: Breaker and cable sizes follow from the 80 kW amperage figures in the sizing section; our amperage chart lists the other voltages, and our power calculators are a starting point for the load list behind them.
• Condition: Weigh our new generators against our used generators, along with hours and service history.

Reach our team to price the 80 kW set you are looking at.

When One Major System Fits 80 kW

Your Situation	Better Fit
Moderate load with room to spare	75 kW generator
Single major system, moderate everyday load	80 kW (this page)
Multiple heavy systems running concurrently	100 kW generator
Larger commercial building or growing production facility	125 kW generator

Why 80 kW Buyers Get Service and Inspection Together

We have spent a decade supplying generators that arrive inspected. Each 80 kW unit, new or used, clears a 22-point inspection, and the 30-day IronClad warranty backs it. After installation, our service and maintenance team handles routine care and repairs. Explore the full inventory or contact us about your application.