portable vs standby generator

This article explores the key differences between portable and standby generators, analyzing their strengths and weaknesses to help you decide

June 23, 2025
BY BISON

A generator is the way to go if you want to power your home through a blackout. However, as with most things, choosing the right tool for the job is essential. Among the various types of generators available today, portable and standby generators stand out as the two main categories.

A simple way to distinguish: Portable generators are versatile and mobile, ideal for temporary power needs during emergencies or outdoor events. Typically, standby generators are permanently installed and automatically start during a power outage, providing a seamless and continuous supply of electricity.

This article explores the key differences between portable and standby generators, analyzing their strengths and weaknesses to help you decide which option is better suited for your specific needs.

Portable generators

Portable generators are compact devices designed to provide temporary electrical power by converting fuel into electricity. They typically deliver a power output ranging from 1,000 to 12,000 watts, making them suitable for various small- to medium-scale applications. Common fuel types include gasoline, propane, diesel, and newer dual-fuel options, offering flexibility based on availability and preference.

As the name implies, portable generators are easy to move from one location to another, providing power when and where it’s needed. Conventional open-frame generators and compact, ultra-quiet inverter models are the most common varieties. They generally have small to medium-sized fuel tanks ranging from 0.9 to 20 gallons.

Advantages:

Small, lightweight, and easy to transport
Versatile — can be used at home, on job sites, in RVs, or for outdoor activities like camping
Many have quiet, encapsulated designs
Lower cost compared to standby generators
Simple setup without the need for professional installation

Disadvantages:

Limited power output — usually cannot run an entire home
Require manual starting and refueling
Some models can be noisy
Small fuel tanks limit runtime
Risk of carbon monoxide poisoning if used improperly
Exposure to harsh weather can affect performance
Regular maintenance and safe fuel storage are necessary

Standby generators

Often referred to as whole-house or fixed generators, standby generators are permanently installed outside a home or building, similar to an air conditioning unit. They are connected to the home’s natural gas or liquid propane supply, eliminating the need for manual refueling or extension cords. Equipped with an automatic transfer switch, they detect a power outage and activate automatically, providing backup power whether you are home or away.

Standby generators are powerful systems designed to run most or all of a home’s electrical appliances, with typical outputs ranging from 10,000 to 160,000 watts. They are enclosed in weatherproof, insulated covers, allowing safe and continuous outdoor operation in any weather. Common fuel sources include diesel, propane, or natural gas from a public supply.

Due to their automatic operation and high power capacity, standby generators are ideal for homes, hospitals, institutions, and other places where uninterrupted power is critical. Once the power goes out, start immediately.

Advantages:

Very reliable and powerful, can run essential systems or an entire home
Start automatically when a power outage is detected
Permanently installed and weatherproof for continuous outdoor use
Quieter and safer due to insulated housing and fixed fuel connection

Disadvantages:

Permanently fixed model – not removable
Higher upfront cost compared to portable generators
Require professional installation and possible local permits
Regular maintenance needed to ensure reliability

Portable vs standby generator: the differences compared

Here’s a concise comparison table summarizing the key features and differences between portable and standby generators:

Category	Portable Generator	Standby Generator
Power Output	1,000 – 12,000 watts	7,000 – 150,000 watts
Fuel Type	Gasoline, diesel, propane, or natural gas	Diesel, natural gas or propane
Starting Method	Manual recoil pull or electric start	Automatic transfer switch activates generator upon power outage
Runtime	4 to 18 hours, depending on fuel tank size and load	Can run continuously as long as fuel supply is available
Installation	DIY installation; no permanent setup required	Professional installation required; involves wiring and transfer switch setup
Initial Purchase Price	Lower	Higher
Maintenance Expenses	Moderate; regular oil changes, fuel stabilization, and cleaning	Lower relative maintenance; typically annual professional servicing
Fuel Costs	Higher per kilowatt-hour; depends on generator size and fuel type	Generally lower per kilowatt-hour due to efficiency and connection to natural gas
Long-term Value	Good for occasional use; depreciation over time	built-in as part of home infrastructure, can increase property value
Noise Levels	Generally louder (60-80 dB)	Quieter operation (50-60 dB) as they are permanently installed with sound-dampening
Portability	Highly portable; lightweight and equipped with wheels for easy movement	Permanently installed; BISON mobile & towable gensets models can be moved
Maintenance	Regular fuel and parts checks	Scheduled servicing

Summary

Marine generators typically provide power for critical navigation and communication systems, while regular generators meet domestic or industrial needs.

When choosing between marine and regular generators, evaluate the power needs of your specific application. Consider that marine generators generally cost more due to their special features and rugged construction. Evaluate your budget and balance your power needs. Also note that marine generators may require more frequent maintenance due to the harsh marine environment, while regular generators have a simpler maintenance schedule.

Whether you are sailing or powering your home or business, choosing the right generator is critical for efficiency and safety. Carefully evaluate your needs and invest in a generator that best meets your specific requirements. For expert advice and options suitable for your situation, contact us today!

Choosing the right generator: Key factors to consider

Evaluate: When selecting a generator, start by assessing your specific power requirements. Decide whether you need backup power for a few essential appliances or enough to run your entire home — this will help determine whether a portable or standby generator is the better fit.
Budget: Consider both the upfront cost and ongoing expenses like maintenance and fuel. Portable generators are usually more affordable initially, while standby generators can offer greater long-term value for whole-home backup.
Frequency and duration of outages: Think about how often and how long power outages happen in your area. If outages are frequent or extended, a standby generator may be the more reliable choice.
Fuel availability: Check the availability and cost of fuel sources near you. Standby generators usually use natural gas or propane, offering continuous power without manual refueling.
Local regulations and permits: For standby generators, research local regulations and permit requirements, as installation must meet building and safety codes.
Noise tolerance: Consider how much noise you can tolerate, especially if you live in a neighborhood with noise restrictions. Standby generators generally operate more quietly than many portable models.
Portability needs: If you need a generator you can take camping, tailgating, or use on different job sites, a portable generator is a practical choice.
Property type and use cases: Think about your property layout and typical usage. Standby generators suit whole-home backup, while portable generators provide flexible power for outdoor or temporary needs.

Conclusion

For those needing a mobile solution for events or worksites, look for portable models that balance easy transport with sufficient power output for essential equipment. On the other hand, homeowners seeking uninterrupted, whole-house backup power should consider a standby generator with automatic transfer and a dedicated fuel supply. These systems deliver higher power output, longer runtimes, and greater convenience but come with higher upfront costs and require professional installation.

As a professional generator manufacturer in China, we are committed to helping you choose the best power solution for your needs. Contact BISON today to get our expert advice and explore our wide range of high-quality portable and standby generators. We will provide you with comprehensive sales literature, technical support, and after-sales service.