Kohler vs Westinghouse Standby Generators

Warranty: what to compare

A standby generator is a long-term investment, so warranty terms matter more than on a portable unit. Both Kohler and Westinghouse back their standby generators with limited warranties, but the details differ by model and by how the unit is installed. Look for the coverage period on the generator itself, the transfer switch, and the labor allowance.

Before you compare, read the warranty document for each model you are considering. Check whether the warranty is transferable if you sell your home, whether it requires professional installation by a certified electrician, and whether routine maintenance like oil changes must be done by an authorized dealer to keep the coverage valid. These terms are often more important than the headline coverage length.

For general guidance on what to look for in any generator warranty, see our article on generator warranty coverage.

• Coverage years for parts, labor, and the transfer switch
• Conditions that might void the warranty, such as improper installation or fuel type
• Whether the manufacturer provides direct support or requires going through a dealer
• What is excluded, like battery replacement or normal wear items

Build quality and durability

Standby generators run outdoors in all weather, so construction quality is critical. Both Kohler and Westinghouse offer models with weather-resistant enclosures, but the materials and the way the internal components are protected can vary by model. Look for a corrosion-resistant housing, sealed control panels, and a robust mounting base.

Engine build quality affects long-term reliability. Kohler builds many of its own engines, while Westinghouse sources engines from established manufacturers. Both approaches can be durable, but the key is how well the engine is matched to the alternator and how easy it is to service. Check the oil capacity, the valve train design, and whether the engine has a cast iron sleeve for extra longevity.

Noise is also a feature of build quality. A well-enclosed generator with sound-dampening panels will be quieter than an open model. Compare the decibel ratings on the spec sheets, but remember that enclosure design matters as much as the number. For more on generator noise, see our guide to noise levels.

• Enclosure material: steel vs. aluminum vs. composite
• Engine type and whether it has an overhead valve design
• Oil filter and oil capacity for easier maintenance
• Access to service panels and the design of the air intake

Features and control systems

Today's standby generators come with a range of convenience and safety features. At a minimum, look for automatic load management, which drops nonessential circuits if the generator is overloaded, and a digital controller that monitors voltage, frequency, and oil level.

Both Kohler and Westinghouse offer remote monitoring options, though they differ in how they connect. Some use Wi-Fi and a mobile app, while others rely on a wired wall display. Consider which interface you prefer and whether the app provides real-time alerts for faults or maintenance reminders. For a deeper dive into remote monitoring, read our article on Wi-Fi vs. Bluetooth monitoring.

Safety features should be nonnegotiable. Standby generators that run on natural gas or propane must include a carbon monoxide detection system that shuts the unit down before CO reaches dangerous levels. The U.S. Consumer Product Safety Commission warns that generators produce large amounts of carbon monoxide, and this applies to standby units as well as portables. Always install a battery-operated CO alarm in your home, even with a standby generator, per the CDC and EPA guidelines. Look for a generator that meets the latest voluntary safety standards, such as UL 2201, which requires a CO shutoff system.

Fuel type is another feature. Both brands offer natural gas configurations, which is convenient if you already have a gas line. Natural gas is delivered continuously, so you don't need to store fuel. The U.S. Energy Information Administration notes that natural gas is a fossil fuel composed mostly of methane, and it is a common choice for home heating and appliances. For a comparison of fuel options, see our guide to fuel types.

• Automatic transfer switch compatibility with your home's electrical panel
• CO detection and automatic shutdown
• Remote monitoring via app or wall display
• Fuel type: natural gas or propane, and if it can switch automatically

Which brand should you choose?

The right choice depends on your priorities. If you value a warranty that is easy to understand and a wide dealer network, you might lean toward Westinghouse. If you prefer a brand that manufactures its own engines and has a long history in power equipment, Kohler might be your pick. But without looking at a specific model, you cannot know which offers better value.

Start by sizing your home backup power needs. Use our guide to sizing a home backup generator to estimate the total wattage you need. Then look at the standby generators in our standby generator buying guide and filter by brand. Our dedicated guides for Kohler and Westinghouse list the models that met our comparison criteria, though we don't test units ourselves.

Compare the selected models side by side on the specifications listed on the maker's website: running watts, transfer switch rating, engine displacement, and noise level. Then download the warranty PDF and read the fine print. That document often reveals differences in coverage that aren't obvious from a brochure.

What to pick for your use

Questions

Is Kohler better than Westinghouse for standby generators?

There is no universal answer. Both brands produce reliable standby generators, and the better choice depends on the specific model's warranty, build quality, and features you value. Compare the specifications and warranty terms for the models you are interest in, not just the brand name.

Do Kohler and Westinghouse standby generators have carbon monoxide detection?

Many newer models from both brands include carbon monoxide detection that shuts the generator down before CO reaches dangerous levels. Always check the spec sheet for a CO shutoff system, and regardless of that feature, install a battery-operated CO alarm in your home per CARB and CDC recommendations.

What should I look for in a standby generator warranty?

Pay attention to the coverage length for parts and labor, whether the transfer switch is included, and whether there are conditions like required professional installation or dealer-maintenance. Read the warranty document fully before purchasing.

Can I run a Kohler or Westinghouse standby generator on natural gas?

Yes, both brands offer models designed for natural gas, and many also run on propane. Natural gas is a common choice because it connects to your home's existing supply, but you will need a qualified installer to make the connection. Check the fuel type on the spec sheet for each model.