Generator Rentals

Rent or Buy: How the Two Compare

Both paths solve the same problem differently. The table below lays out where each one lands on the factors that usually decide it.

Factor	Renting	Buying
Upfront cost	Rental rate and delivery, no capital outlay	Full purchase price, or financed over time
Time to get running	Days, from available fleet stock	Days for inspected used equipment, longer for new production
Maintenance and fuel	Covered under rental terms	Owner’s responsibility, or a service agreement
Flexibility on size	Swap units as the load changes	Fixed to the unit you bought
Availability during a regional event	Depends on fleet demand at that moment	On your site regardless of demand elsewhere
Cost over multiple years	Accumulates with each rental period	One-time, plus maintenance
Accounting treatment	Operating expense	Capital asset, depreciated

Which column fits depends less on general rules than on your specific situation, so here are the scenarios we see most.

Common Scenarios and What Each One Points Toward

• A construction project with a fixed end date. Renting matches the timeline. You pay for the months you need, and the unit leaves when the job closes out. If your company runs back-to-back projects year-round, the comparison shifts, since the equipment would be working continuously.
• A plant turnaround or scheduled outage. Renting is standard practice. The load is temporary, often larger than anything the facility owns, and the requirement ends on a known date.
• A permanent unit is down and needs replacing. Renting bridges the gap while the replacement is sourced, delivered, and commissioned. Many facilities do both: rent now, buy for the permanent installation.
• Code-required or insurance-mandated standby power. Ownership is the usual answer, since the obligation is permanent and the generator must be on site indefinitely. Renting covers the interim if the permanent installation is still being built.
• Seasonal or peak load. Renting fits if the need recurs for a few months a year. Once you are renting the same equipment most of the year, the numbers start to favor owning it.
• An event or short-term venue. Renting, almost without exception. Event power is measured in days, and the equipment needs to leave afterward.
• Unclear or changing load requirements. Renting lets you right-size through trial rather than guesswork. Once the load is understood, buying becomes a straightforward comparison.

Rental Generator Sizes

Our rental fleet runs from 20 kW up to 2000 kW, in diesel and natural gas.

• 20 kW to 99 kW — site trailers, hand tools, small pumps, and small commercial loads. Equivalent purchase options: 25kW – 99kW generators.
• 100 kW to 499 kW — larger construction sites, temporary commercial power, mid-size facility coverage. Equivalent purchase options: 100kW – 499kW generators.
• 500 kW to 999 kW — large buildings, industrial temporary power, bridging a failed permanent unit. Equivalent purchase options: 500kW – 999kW generators.
• 1000 kW to 2000 kW — megawatt-class temporary generation for plants, campuses, and infrastructure projects. Equivalent purchase options: 1000kW – 1499kW and 1500kW – 1999kW generators.

If your load pushes past 2000 kW, paralleling multiple units is standard practice at that scale and we can model the configuration with you.

Why We Point Large Rentals to Stag Power Rentals

For megawatt-class and other large rentals, we route customers to our rental division, Stag Power Rentals. Four reasons: Location. Stag operates out of Dickinson, Texas, minutes from the Houston Ship Channel and the Gulf Coast petrochemical corridor. Large rental equipment moves slowly and expensively, so proximity to the job matters more at 1000 kW than at 50 kW. Fleet depth at size. Large units are the harder end of the rental market to source. Stag maintains a 20 kW to 2000 kW fleet rather than treating big equipment as an occasional special order. Distribution equipment under one roof. A megawatt-class rental needs panels, cable, and switching alongside the generator. Stag’s power distribution rentals cover iLine panels, distribution panels, spider boxes, transformers, and transfer switches, either standalone or bundled with the generator. One vendor, one point of contact, one delivery to coordinate. Support during the rental. Large temporary installations carry more risk when something goes wrong mid-project. Stag provides 24/7 support and load bank testing when documented performance is required. For projects where the distribution gear will be permanent even though the generator is temporary, our parts and accessories inventory covers transfer switches, PDUs, and trailers for purchase.

What to Settle Before You Rent

Four questions determine what shows up on your site and what it costs to run. What is the load, including motor starting? Motors draw several times their running current at startup, and that surge sets the generator size more often than steady-state demand does. Our power calculators give you a working estimate, and the amperage chart converts between kW, kVA, and amps at your site voltage. Our team also runs full load calculations at no charge. How long will it run, and at what load factor? This drives fuel consumption and refueling logistics. Our diesel fuel consumption chart gives you a starting figure. What are the site conditions? Access for delivery, a level surface, clearance for airflow and service, and a plan for refueling. Larger units may need crane or rigging service at delivery. What connection does the load need? Camlock connections, a distribution panel, a transfer switch, or a direct tie into existing gear. Sorting this before delivery prevents a generator sitting idle while someone sources cable. If you are buying rather than renting, we carry transfer switches and distribution equipment in parts and accessories.

Ready to Rent a Generator?

Tell us what you are powering, how long you need it, and where the site is, and we will match equipment to the job. Call 1-844-STAG-PWR, browse rental power distribution equipment, or contact us and we will route you to the right person. If you would rather compare purchase options alongside rental rates, our full inventory of industrial generators and financing options are both available.