Since 1959, Generac has produced affordable home standby generators. They are the #1 developer of home backup systems, the manufacturer of the broadest range of power products in portable, commercial, residential and industrial power resources.

So if you’re looking at generators and you find yourself scrutinizing a Generac, how do you choose?

Easy, read this article about the best Generac portable generators. This is your buyer’s guide.

Comparison Table

1
Generac 5734
Dimensions: 48.50 x 30.75 x 38.50 inches

Weight: 373 Pounds

Power Source: gas-powered

Wattage: 22500 watts

2
Generac 6864
Dimensions: 33.10 x 22.50 x 25.60 inches

Weight: 254 Pounds

Power Source: diesel-powered

Wattage: 5000 watts

3
Generac 7690
Dimensions: 28.30 x 27.00 x 28.00 inches

Weight: 196 Pounds

Power Source: gas-powered

Wattage: 6500 watts

4
Generac 7677
Dimensions: 24 x 22.5 x 21.3 inches

Weight: 105 Pounds

Power Source: gas-powered

Wattage: 3600 watts

5
Generac 7678
Dimensions: 24.00 x 22.50 x 21.30 inches

Weight: 105 Pounds

Power Source: gas-powered

Wattage: 3600 watts


Top 5 Best Generac Portable Generators

Generac Electric Start Gas Powered Portable Generator 5734

Generac Electric Start Gas Powered Portable Generator

The Generac Electric Starter can get to work out the box. It powers wells, heat pumps, refrigerators, internet connectivity and microwaves. If there’s a power outage or you’re off the grid, this one’s perfect for security systems, electric stoves and computers.

Features

  • 992cc OHVI engine incorporates
  • Full pressure lubrication with auto-style spin
  • Included battery with electric start
  • Plug-in battery charger jack
  • 16 gallons fuel tank
  • 10 hours of run time at 50% load

Design and Materials

The generator has a hardened 1-1/4″ cradle tube engineered from steel. This promises strength and durability. You also get an integrated lifting eye that helps with easy transport of the device. The X-Torq governor enhances performance, minimizing stalls and managing a smooth operation.

Drawbacks

This model isn’t necessarily fuel-efficient considering the price. Customers have also had issues with getting replacement parts, saying the manufacturer is quite slow in this regard.

Overall

We like that the Generac Electric Starter is a gas-powered portable with 15,000W. That makes it a tool ideal for a variety of projects. You’ll find this one on the job site or at home ready to power appliances at the drop of a hat. We like its compact frame. The lifting handles and all-terrain pneumatic wheels make for fast and easy transport.

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Pros
  • Compact size and pneumatic wheels make it easy to move around
  • Electric start means no aggravating cord
  • Keep basement dry running sump pump.
  • Run outdoor lighting, music and power tools
Cons
  • Uses a significant amount of gas
  • Replacement time for parts can take months to arrive (find a local supplier for quick fixes)

Generac Diesel Powered Portable Generator 6864

Generac Diesel Powered Portable Generator 6864

The Generac Diesel Powered Portable Generator has True Power tech that lowers total harmonic distortion to less than six percent. That means smooth handling of appliances, power tools and your sensitive electronics. With idle control and its impressive fuel tank, the generator runs for a solid period of time.

Features

  • Fully welded and durable 1-1/4″ steel frame
  • Yanmar LW Series 435cc air-cooled direct injection
  • Industrial-grade diesel engine
  • Diesel power is efficient and requires less maintenance
  • True Power Technology ensures less than 6% total harmonic distortion
  • Voltage selector
  • Powers sensitive electronics

Design and Materials

The Generac Diesel Powered Portable is of a sturdy steel design. There’s a 12-gallon tank that offers a 50% load that’ll run an impressive 32.4 hours. The engine is industrial grade. The generator’s equipped with air-cooled direct injection. The control panel has a single touch starter, voltage selection and a meter for tracking maintenance intervals.

Drawbacks

The Yanmar diesel motor has a cut-off solenoid. It needs power to remain open. This means the generator will not run without a (not included) battery, even though it has a pull starter (and touch start!). The pull start takes too long to get in gear. And this isn’t the quietest motor out there.

Overall

This is a great generator for smaller houses and renegades living off the grid. Its low maintenance and long run times are great benefits. It has 5000 running watts and operational power of 5500 starting watts. We found it to be efficient and loved its harmonic distortion levels. The Generac 6864 is a sound choice for tough jobs.

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Pros
  • TruePower™ Technology minimizes harmonic distortion
  • Idle Control conserves fuel and reduces noise
  • Meter tracks maintenance intervals
Cons
  • You’ll have to purchase a wheel kit
  • Despite pull start, you’ll still have to purchase the separate battery

Generac Portable Generator 7690 GP6500

Generac Portable Generator 7690

Generac’s diesel-powered portable generator has Rush technology. It’s an advanced feature that gives, compared to comparable models, 40 percent more starting capacity. That means doing more with less while increasing on-demand electric current. There’s a safeguard for auto shutdown when low oil levels threaten to harm the engine.

Features

  • PowerRush Advanced Technology™
  • OHV engine with splash lubrication
  • Large-capacity steel fuel tank
  • Low oil level auto-shutdown safeguards
  • Hour meter tracks maintenance
  • Compatible HomeLink™ manual functionality

Design and Materials

The Generac Diesel Powered Portable is a sturdy steel design. There’s a 12-gallon tank that offers a 50% load that’ll run an impressive 32.4 hours. The engine is industrial grade. The generator’s equipped with air-cooled direct injection. The control panel has a single touch starter, voltage selection and a meter for tracking maintenance intervals.

Drawbacks

The Yanmar diesel motor has a cut-off solenoid. The element needs power to remain open. This means the generator will not run without a (not included) battery, even though it has a pull starter (and touch start!). The pull start takes too long to get in gear too. And this isn’t the quietest motor out there.

Overall

This is a great generator for the smaller house and anyone living off the grid. It’s low maintenance and long run times are great benefits. It has 5000 running watts and operational power of 5500 starting watts. You’ll see it’s highly efficient and loved its harmonic distortion levels.

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Pros
  • Minimal maintenance, greater efficiency, longer lifespan
  • TruePower™ Technology minimizes harmonic distortion
  • Idle Control conserves fuel and reduces noise
  • Meter tracks maintenance intervals
Cons
  • You’ll have to purchase a wheel kit
  • Despite pull start, you’ll still have to purchase the separate battery

Generac 7677 GP3600 Portable Generator

Generac Portable Generator 7677 GP3600

Put the affordable Generac Portable Generator on deck. It’s ready to power your tools, deliver electricity as needed and tackle all your build projects. The Generac delivers startling starting power for critical and unexpected power needs. Whether looking at an outage, tailgating or camping, Generac always makes getting things done easy and comfortable. Contractors love the versatility this portable power tool brings.

Features

  • Generac’s PowerRush Advanced Technology
  • OHV engine with splash lubrication offers long engine life
  • Low-oil level shutdown safeguards engine automatically
  • Steel fuel tank is large capacity with incorporated fuel gauge
  • Hardened steel-tube cradle for added durability and strength
  • Heavy-duty, never-flat wheels allow for easy portability
  • Fold-down handle for sturdy portability and compact storage

Design and Materials

Compact and strong, the generator takes up minimal space. The OHV engine boosts engine life. The steel fuel tank has an impressive capacity with an integrated fuel gauge that enhances durability. A hardened tube cradle engineered of steel promises great strength. The never-flat wheels make the generator an easy transport.

Drawbacks

The generator’s not air quality compliant for California. Some consumers have found it louder than most, but not to the point of distraction. The portable Generac does have a four-prong twistlock, but there’s no RV facility. And while it’s known to leak, there are also instances where the generator’s kept consumers powered for weeks during emergencies.

Overall

The 7677 Generac is one of the most compact models we’ve managed with a lot of versatility and premium features for an affordable price. At a little over 100 pounds, it has 4500 starting watts and 3600 running. We also appreciate its capacity for maximized electrical current upon demand.

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Pros
  • Inexpensive
  • Accessories included
  • Lightweight compared to similar models
  • Automatic Voltage Regulation
  • Has a spark arrestor, making it perfect for forested areas
Cons
  • Known to leak
  • No electric start
  • Relatively low run time

Generac 7678 GP3600 Portable Generator

Generac Portable Generator 7678 GP3600

The Generac 7678 GP3600 portable is a CARB certified and compliant portable ready to backup appliances. An exceptional option for emergency power, it features Generac standards like PowerRush tech, a large-capacity fuel tank and fold-down handle for easy transport. You won’t have to worry about keeping the lights on, freezers and refrigerators running. You’ll also have power for sump pumps, space heaters and window air conditioners.

Features

  • 212 cc Generac OHV 4-stroke engine
  • Running wattage of 3600 and peak wattage of 4500
  • Fuel capacity of 3.7 gallons with operate up to 9.3 hours at 50% load with full tank
  • 5 AC outlets, including two duplex 120V 20A (5-20R), 120V 30A (L5-30R) receptacle
  • Control panel digital data center
  • CARB-compliant, use permitted in all states

Design and Materials

The Generac portable has a 212 cc OHV four-stroke engine. The digital data center provides real-time information on run hours through status and activity monitoring. A built-in gauge for fuel is a convenient method for checking gas levels. The device also comes with useful accessories like a funnel, oil and a tool kit.

Drawbacks

RVers will have to buy the L5-30P to TT-30R adaptor. The GP3600’s has a high THD. That means your sensitive electronics are off the table. You’ll have to find another way to charge and use your phones, tablets and laptops.

Overall

The Generac GP3600 delivers needed electricity in an affordable package. Generac packed the solution with a range of premium features, including PowerRush. It has a strong cradle for security and a shutdown when oil levels are low. We see this compact device on job sites and in homes helping its owners stay on point.

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Pros
  • Inexpensive
  • Several accessories come with generator
  • Lightweight for its kind
  • Features spark arrestor
  • CARB-compliant
Cons
  • Low run time
  • Not RV ready
  • Can’t use your personal electronics

Buyer’s Guide – Generac Portable Generators

How a Portable Generac Generator Works?

The Generac generator functions on a simple principle and that’s the transfer switch. Whenever that switch activates, the generator’s engaged. It will consume its fuel to generate electrical power. Any device connected to the generator will use the Generac to perform operations like keeping lights on, refrigerators running, heaters warming and more.

The transfer switch sends power between generator and utility. In the case of an outage, the switch automatically kicks in (unless your model is manual) and keeps power going. The auto switch will go off once normal power resumes.


How are Generators Used?

Generac devices are versatile and used for many reasons, both commercial and residential.

In the Wild

Outdoors adventurers take portable generators on their journeys to provide themselves with home comforts. That can include watching a game or charging a tablet or cell phone.

Emergencies

Disaster preparedness is a common job turned over to portable generators. Generator usefulness for days on end during power outages or dealing with extreme temperatures is measurable.

Routine Power Outages

One of Generac’s high-capacity standby backup generator can keep you on your daily routine during a power outage without losing breathe. Portable generators keep the refrigerator on, fans blowing and other appliances going until electricity comes back.

Standby Power for Businesses

Hospitals couldn’t survive without these standbys as even a few seconds of power loss could be disastrous. Commercial enterprises have a lot to lose when the grid goes down. A few hours could add up to millions of ducats in missed orders. A pair of standby generators ensure uninterrupted power.

Construction

Construction sites use generators to support machinery, security, ventilation, trailers, water pumps, and more. They power table saws, drills, grinders, and other tools. There’s a special class of generator for welding.

Mining

Primitive environments like mines depend on generators. Electricity comes from generators powering shovels, drills and excavators. They keep tunnels lit in deep underground territories.

Agriculture & Ranching

In farming, there are fish farm air pumps, stable, barn, and chicken coop heaters, as well as irrigation systems. They are commonly powered by generators.

Night Working

Road maintenance crews work at night while trying to minimize driver inconvenience. For operations like these, trailer-mounted light towers providing a temporary fix, are attached to generators.

Fairs & Carnivals

When you’re enjoying a Friday of traveling carnival antics or spending your Saturday in a schoolyard taking in amusement rides, portable generators make it possible. Generators power candy cane machines, bounce houses, rides, shaved ice, music, lights, and anything else in need of electricity.

Family Events

Generators are a staple at outdoor parties, including weddings, sweet sixteen and reunions. A DJ or band set up, dance floor lighting, food warmers and coffee makers, the photo booth, and all outdoor heating ad cooling units need a power source.

Sporting Events

Schools and sporting organizations often rely on generators to power scoreboards, lights, speakers and other electronics.

Tailgating

Speaking of sports, where would tailgating go without generators? There’d be no massive flat-screen TV, to start. When you need serious power for your ‘gating, you need a Generac. It’s the answer for powering a projector, mini-fridge, speakers, electric grill, mobile hotspot, fans, or a video game console.


Why Is It Important to Choose the Right Generator?

Generac models cover recreational units to devices that can power an entire house. Buy the wrong generator and you end up with either a device that can’t do the job or you spend far more on a generator you don’t need.

Foremost, take wattage into consideration. If you’re buying a backup, decide what essentials you hope to use. Big appliances like air conditioners will draw more wattage while cycling. Account for surge watts in your calculations.

Another factor will be how often you think you’ll use the Generac. A construction site’s requirements will differ from a homeowner’s. Do you experience frequent outages? Do you hit the outdoors a lot? Are you using heavy-duty power tools?

You have to consider safety. Look for CARB compliance. A generator with an auto-shutoff if it detects CO fumes would be invaluable.


FAQs – Generac Portable Generators

What will a 15,000 watt generator run?

A 15,000W generator is a powerful machine. It can run a range of appliances at the same time. But which appliances will be dependent on the generator’s outlet selection. You’ll be able to plug-in air conditioning units, full-sized refrigerators, ovens and more.

But before you go out and buy that 15,000W baby, ask yourself do you need that much power. Take a good look at what you would want your generator to power or talk with a tech. Buying the right device for the right situation is the best way to go. And it’ll save you money too!

How do I hook up a generator?

You can prepare a generator in one of two different ways. If you have a small project that’s going to need about 5,000W, use a high-quality extension cord. But if you need more power than that, you want a power transfer system.

What type of oil should I use and how often should I change the oil?

That depends on external conditions. If temps are above 32°F, go with SAE 30. Anything between -10°F and 40°F, use 10W-30. If you’d prefer an all-temperature solution, use Synthetic 5W-30.

You want to change the oil after the initial 20–30 hours of operation. From that point on, a good period is every 100 hours of run time.

How often should I perform routine maintenance on my portable generator?

Generators need periodic maintenance, such as oil and filter changes. If you want maximum performance, keep your owner’s manual on deck at all times. It not only covers all routine maintenance procedures and schedules, but it will also explain what error codes mean and break down common glitches. You can contact an authorized Generac dealer about maintenance plans for routine checks and any unexpected repairs.

What type of gas do you recommend for my portable generator?

We suggest fresh, clean unleaded gasoline. It should contain a minimum 87 octane rating.

Summary/Conclusion

Your generator is the first line of defense when it comes to managing your power. A Generac generators will make roughing it comfortable. It’ll give you function in that far corner of the construction site. You can’t beat portable power and you can’t do better than Generac portable generator.

This buyer’s guide is a comprehensive review of how to choose a generator from one of the best manufacturers in the businss. With a generator from Generac in your toolkit, you’ll have peace of mind knowing you have power on demand.


John Billiou

John Billiou

LOCATION: Visalia, California

OCCUPATION: President

John Billiou assumed operations of the family business in 1989 with a “big appetite” for success.

Based in Central California, Billiou's Has been serving the Parts Needs of Lawn & Garden Dealers Across the Western United States for 70 Years.

Today, the company distributes new equipment and parts in 13 Western states and John said their No. 1 customers are cities and counties.

Billiou’s provides field support through their call center, field sales force, and an extensive website.

Billiou’s team strives to longstanding value to the customer and readers by making reliable and solid buying recommendations.

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