Choosing a standby generator usually comes down to three questions: Do you want a transfer switch in the box? Do you need 14kW, 24kW, or 50kW? And are you comfortable with an open-box or used unit? These four Generac options cover those choices, with listed prices from $2,217.26 to $8,500. If you're shopping portable industrial generators, this lineup shows why fuel source and included accessories matter as much as wattage.
Quick take
The least expensive unit here, the new 24kW Guardian 7210, includes a Wi-Fi transfer switch and offers the highest output among the new generators. At the other end, the 50kW diesel standby generator is the only diesel option and carries the highest listed price. Between them, the two 14kW air-cooled units share the same platform but differ on the included 200A automatic transfer switch.
Listed prices at a glance
| Product | Listed price | Price bar |
|---|---|---|
| NEW Generac 7258 14kW with 200A ATS | USD 4,999.00 | |
| Generac 7258 14kW without ATS | USD 4,399.00 | |
| New Generac 7210 Guardian 24kW with Wi-Fi ATS | USD 2,217.26 | |
| 50KW Generac Diesel Standby, 271hrs | USD 8,500.00 |
Decision matrix
| Your priority | Best fit | Why |
|---|---|---|
| Lowest listed price, new condition | New Generac 7210 Guardian 24kW | New unit with Wi-Fi transfer switch and 24kW output |
| 14kW with transfer switch included | NEW Generac 7258 14kW w/ 200A ATS | Air-cooled 14kW plus 200A automatic transfer switch |
| 14kW when you already have a transfer switch | Generac 7258 14kW without ATS | Same 14kW platform, no transfer switch, lower listed price |
| High-output diesel for industrial-scale power | 50KW Generac Diesel Standby | 50kW output, single-phase 120/240V, 200-gallon tank, used condition |
Product notes
NEW Generac 7258 14kW Air-Cooled Whole Home Standby Generator w 200amps ATS
Choose this one when you want a 14kW air-cooled whole-home generator and the 200-amp automatic transfer switch handled in one package. The 200A ATS is included, so you don't have to source a separate switch for a typical whole-home install. The condition is listed as open box, so the unit may show handling wear despite the "NEW" in the product name. That's the main limitation to weigh. It's also priced at the upper end for the 14kW pair, so if you already have a transfer switch, the no-switch version covers the same 14kW output for less.
Generac 7258 14kW Air-Cooled Whole Home Standby Generator- NO transfer switch
If your transfer switch is already in place, or if you plan to buy one separately, this open-box 14kW unit gives you the same Generac 7258 platform and air-cooled design at a lower listed price than the version with the 200A ATS. The compatible model number G0072580 matches the other 14kW unit, so the core generator is the same. The limitation is spelled out in the product name: no transfer switch included. That means the price covers only the generator itself, and you'll need to account for the extra component and installation before you compare it with the all-in-one option.
New Generac 7210 Guardian 24kW Home Standby Generator w/ Wi-FI Transfer Switch
This is the lowest-priced option in the group and the only one listed as new and including a Wi-Fi transfer switch. The 24kW output puts it above both 14kW units, yet the listed price sits well under the 14kW options. That combination makes it the easiest pick if you want more whole-home capacity without moving to a used unit. The limitation is scale: 24kW is still below the 50kW diesel, and it runs on natural gas or liquid propane rather than diesel. For most houses with high air-conditioning loads, that's usually enough, but it won't match the industrial output of the 50kW machine.
50KW Generac Diesel Standby Generator, 271hrs, 120/240v 1P, w/tank
This diesel standby unit is the high-output choice in the comparison, rated at 50kW and wired for single-phase 120/240V. It has 271 hours on it and a 200-gallon tank, which gives you a sense of the installed scale and runtime capacity. The limitation is that it's the most expensive option here and is in used condition, so the purchase is not about getting the lowest upfront number. Instead, you're paying for diesel fuel, more than double the wattage of the 24kW unit, and the convenience of a large integrated tank. For that reason, this unit belongs in a permanent standby role rather than a quick home-backup setup.
Final recommendation by use case
- Whole-home backup at the lowest listed price: New Generac 7210 Guardian 24kW Home Standby Generator w/ Wi-FI Transfer Switch.
- 14kW with the 200A ATS included: NEW Generac 7258 14kW Air-Cooled Whole Home Standby Generator w 200amps ATS.
- 14kW when you already have a transfer switch: Generac 7258 14kW Air-Cooled Whole Home Standby Generator- NO transfer switch.
- Industrial-scale diesel backup: 50KW Generac Diesel Standby Generator, 271hrs, 120/240v 1P, w/tank.
