Top-Rated Whole House Generators for 2026
Independently researched and ranked. Updated February 2026.
Generac 22kW Guardian Series Standby Generator
Generac owns roughly 75% of the U.S. home standby market for a reason. The 22kW Guardian runs on natural gas or propane, starts automatically within 10 seconds of a power outage, and integrates with Generac's Mobile Link remote monitoring system. The dealer and service network is unmatched. If you want the least complicated path from purchase to installed-and-running, this is your unit.
- Output: 22kW (27.5kVA)
- Fuel: Natural gas / propane
- Engine: Generac G-Force OHVI
- Transfer Switch: 200A included
- Warranty: 5-year limited
- Noise Level: ~67 dB at 23 ft
Champion 14kW Home Standby Generator
Champion's 14kW standby punches above its price point. You get automatic start, a 200A transfer switch, and dual-fuel capability in a package that typically runs $1,500 to $2,000 less than comparable Generac or Kohler units. The trade-off is a smaller service network and a 3-year warranty instead of 5. For homeowners who want solid whole-house coverage without the premium price, it's a legitimate option that deserves a close look.
- Output: 14kW (17.5kVA)
- Fuel: Natural gas / propane
- Engine: Champion 992cc OHV
- Transfer Switch: 200A included
- Warranty: 3-year limited
- Noise Level: ~63 dB at 23 ft
Kohler 20kW RESSmart Standby Generator
Kohler builds generators with the same engineering discipline as their commercial and industrial units. The 20kW RESSmart runs quieter than comparably rated Generac models, with tighter voltage and frequency regulation. The onboard diagnostics are genuinely useful, not marketing window dressing. Kohler's service network is smaller than Generac's but more specialized. If you're spending $6,000-plus on a generator, the extra fit and finish matters. Kohler makes the case that it's worth it.
- Output: 20kW (25kVA)
- Fuel: Natural gas / propane
- Engine: Kohler Command PRO CH1000
- Transfer Switch: RXT Series included
- Warranty: 5-year limited
- Noise Level: ~62 dB at 23 ft
