What Is the Difference Between an Inverter Generator and an Open Frame Generator?

There are several key differences between Inverter Generators and Open Frame Generators, including noise level, fuel efficiency, and power quality.

Inverter Generators

Inverter generators are designed to provide cleaner, quieter, and more fuel-efficient power.

Key features include:

• Lower noise levels compared to open frame generators

• Improved fuel efficiency because engine speed adjusts to the electrical load

• Low Total Harmonic Distortion (THD) — typically below 5%, making them safer for sensitive electronics such as laptops, televisions, and battery chargers

Inverter generators are commonly used for:

• Camping and RV use

• Home electronics

• Quiet environments

• Portable applications

📌 Identification Tip:
If a DuroMax generator model number ends with “iH”, it indicates that the generator is an Inverter Generator.

Open Frame Generators

Open frame generators are typically designed for higher power output and heavy-duty applications.

Key features include:

• Higher wattage capacity for powering larger appliances or multiple devices

• More suitable for job sites or home backup power

• Generally louder than inverter generators

• Typically less fuel efficient under lighter loads

Open frame generators are commonly used for:

• Home backup power

• Construction job sites

• Running large appliances

Explore DuroMax Generator Types

You can view the different generator categories below:

Inverter Generators
https://www.duromaxpower.com/collections/inverter-generators

Dual Fuel Generators
https://www.duromaxpower.com/collections/dual-fuel-generators

Tri Fuel Generators
https://www.duromaxpower.com/collections/tri-fuel-generators

Common Questions

Which generator is better for sensitive electronics?

Inverter generators are generally better for sensitive electronics because they produce cleaner power with lower THD levels.

Which generator is better for home backup power?

Open frame generators are often preferred for home backup because they typically offer higher wattage output and longer runtime.

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