Standby Generators
68 generators available. $0 sales tax. Free freight on orders $499+.
Showing 1–24 of 68 products matching your filters
Showing 1–24 of 68 products matching your filters
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Showing 1–24 of 68 generators
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Commercial and residential standby generators that start automatically during a power outage. GeneratorProDirect is an authorized dealer for Generac, Kohler, and Cummins standby generators — from 10kW home standby units to 500kW industrial systems. All tax-free in 45+ states, free freight on orders over $499, full OEM warranty.
68 generators available. $0 sales tax. Free freight on orders $499+.
Showing 1–24 of 68 products matching your filters
Showing 1–24 of 68 products matching your filters
Showing 1–24 of 68 generators
Standby generator installation must comply with NEC Article 702 (Optional Standby Systems) or Article 700 (Emergency Systems) depending on the application. An automatic transfer switch (ATS) is required to prevent back-feeding the utility grid. Installation requires a licensed electrician and permit from your local Authority Having Jurisdiction (AHJ). Natural gas and propane systems also require compliance with NFPA 54 or NFPA 58 for fuel line sizing.
1. Size by load — not by instinct
Add up the running watts of every circuit you need to power during an outage:
2. Fuel type determines installation complexity
Natural gas: connects to utility line, unlimited runtime, requires gas meter sizing.
Liquid Propane: requires on-site tank, available anywhere without gas utility service.
Diesel: highest energy density, best for industrial applications over 50kW.
3. Air-cooled vs liquid-cooled
Air-cooled (Generac 10-26kW): simpler, lower cost, suited for residential and light commercial. Liquid-cooled (Generac Protector, Kohler 30kW+): more efficient heat management, required for continuous or heavy commercial use.
4. Transfer switch sizing
The transfer switch must match your main panel amperage. A 200A main panel requires a 200A ATS. For whole-house standby, a service entrance rated ATS is typically installed.
Pro tip: Always size up by one unit when choosing a home standby generator. The difference between a 20kW and 26kW unit is often less than $1,000, but the 26kW handles additional load growth and gives headroom for two AC units running simultaneously.
GeneratorProDirect does not collect sales tax in most US states. On a $5,000 generator, a Texas buyer saves $312. California saves $363.
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