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Generac GP3600 - 3600/4500W Portable Generator

The Generac GP3600 (7678) is a portable open frame generator with a rated wattage of 3,600 W and a starting wattage of 4,500 W.

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Generac GP3600Generac GP3600Generac GP3600
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Set an alert for the Generac GP3600 - Current lowest price: $337.50
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Price history for the Generac GP3600
Latest updates:
  • $337.50 - December 9, 2022
  • $450.00 - December 8, 2022
  • $337.50 - December 6, 2022
  • $450.00 - December 2, 2022
  • $360.00 - November 29, 2022
  • $337.50 - November 23, 2022
  • $450.00 - November 22, 2022
Data source: ebay.com
Since: November 22, 2022
  • Highest Price: $450.00 - November 22, 2022
  • Lowest Price: $337.50 - November 23, 2022

Description

The GP3600 portable generator is an excellent choice for emergency power when backing up multiple appliances. Featuring PowerRush™ ADVANCED TECHNOLOGY, it delivers 40% more starting capacity allowing you to do more with less. (source: Generac (opens in a new tab))

Zoom on the Generac GP3600

In a nutshell, the Generac GP3600 is a portable generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in outdoor fairs, festivals or events
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.

Power & Run Time

The Generac GP3600's engine, 212 cc Generac OHV 4-stroke, fueled by gasoline, can deliver 120V. It provides a running wattage of 3600W and reaches a peak wattage of 4500W.

This generator gets running thanks to a conventional pull-start mechanism.

With a full tank, the GP3600 can operate for around 9.3 hours at 50% load (fuel consumption around 0.4 GPH), thanks to its fuel capacity of 3.7 gallons.

Since the GP3600 has a somewhat high THD (<25%), it is advisable to not use it for the powering of sensitive electronic devices.

Outlets

The control panel includes the following 5 AC outlets:

Two Duplexes 120V 20A (5-20R)
120V 30A (L5-30R) receptacle

Even if this Generac generator isn't quite RV Ready, it still allows for an easy RV connection via an L5-30P to TT-30R adaptor, thanks to its L5-30R receptacle.

Portability

The Generac GP3600 has a conventional, open frame design, of the following dimensions: L24 x W22.5 x H21.3 in, which offers support and allows it to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.

As the generator's weight is 105 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). Still, once it is on the ground, its wheel kit (⌀8") and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.

Features

Panel of the Generac GP3600

The GP3600's control panel

The control panel of the GP3600 includes a digital data center, which assists you in monitoring its status and activity, as it provides information on the lifetime run hours.

The generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

From a security standpoint, the product offers an automatic low oil shut-off and an overload protection (circuit breaker), allowing you to use it with a peace of mind.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the Generac GP3600 also comes with several accessories, including: tool kit, oil and funnel.

Emissions

The Generac GP3600 is CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.

Moreover, it features a spark arrestor and thus, may be used in forested areas.

The Generac GP3600 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Generac GP3600 compare to generators of similar power (between 3500 and 4500 W).

  • As its weight is 105 pounds, the Generac GP3600 falls in the expected weight range of the devices in the 3500-4500 rated wattage category. In terms of weight, one of the champions in their power range is the WEN GN400i, standing at just 66.1 lbs.
  • As for its autonomy, the GP3600, with an autonomy of around 9.3 hours at a 50% load, is placed on the low end among the generators of its kind. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Predator 4375, which is able to run for around 16 hours.
  • While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. This generator reaches an estimated fuel consumption of 0.4 GPH (gallon per hour) at a 50% load, making it average, for the previously mentioned wattage range. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.23 GPH, the Westinghouse iGen4500DF is a device you could look out for.
According to our stats, the following comparison is pretty popular: Generac GP3600 vs Generac iQ3500.

Price comparison

As you can see from this interactive chart, when compared to other 3500-4500W generators, the Generac GP3600 is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • Several accessories included
AVERAGE SPECS:
  • Decent weight (105 lbs)
  • Decent fuel efficiency
WEAKNESSES:
  • No electric start
  • Relatively low run time

Do you own the Generac GP3600 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine212 cc Generac OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz
Running watts3,600 W
Starting watts4,500 W
Running amps30 amps
Peak amps37.5 amps
Run time @50% load9.3 h
Run time @25% loadUnknown
Features
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (L5-30R)
DC outletsNo
Data centerLifetime run hours
IndicatorsNo
Fuel tankSteel, 3.7 gal
Fuel gaugeYes
Misc
Weight105 lbs
Approx. dimensions (L x W x H)24 x 22.5 x 21.3 in
Noise (lower limit)Unknown
THD< 25%
ComplianceCARB
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel, tool kit, and wheel kit
Warranty3 years
SeriesGP
Other model numbers7678
UPC696471074581

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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About Generac

Generac Power Systems is an American based generator and power equipment manufacturer, founded in 1959. As its name suggests, the main focus of Generac are power generators, and other related electric equipment, such as switches, paralleling systems and small engines. The company has several manufacturing facilities based in the US, thus, their products are made in the USA. However, the company provides no information about the origin of their components.

Warranty Information

The Generac GP3600 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Generac generators, please consult Generac's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-888-GENERAC (888-436-3722).

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Hair dryer18001900
Freezer8101750
Set of 5 LED light bulbs5555
Total2857 W3857 W
For campingRadiant heater13001300
RV refrigerator180600
RV AC (11,000 BTU)10101600
Slow cooker270270
Radio100100
Total2860 W3450 W
For workGrinder14002500
Demolition hammer12601260
Bug zapper8080
Total2740 W3840 W
What is the noise rating of the GP3600?

Due to the lack of standardization in noise emission measurement, Generac does not provide their units' noise levels.

What make is the engine? (Asked April 19, 2020)

The engine is Generac-branded, but neither engineered nor manufactured in the U.S.

Will this gp3600 run an electric pressure washer ? (Asked August 08, 2020)

A basic electric pressure washer usually has a 12 to 13-amp motor, which operates on 120V. 13x120=1560W.

What type of oil and when does it need to be changed (Asked August 14, 2020)

Recommended oil is SAE 10W-30. Here's the oil change schedule recommended by Generac for the GP3600:
Generac GP3600 Maintenance Schedule

What's the purpose of cleaning the spark arrestor every 50 hours ,unfortunately I bought my unit used so I don't have the manual is supposed to go it also where is the serial number located on the generac 3600 Watt unit and last question how many runtime hours before oil changes please let me know thank you so much (Asked September 05, 2021)

You may find the owner's manual here (opens in a new tab). It should give you the answers to all your questions.

Couldn't find the right answer for you? Ask your own question.

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Generac GP3600
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    So far I got to say I really do like my used generac 3600 watt generator is quieter than a typical lawn mower overall seems like it would be great for camping purposes do you believe I’ll enjoy having it

    + PROS:
    • It was just what I was looking for
    - CONS:
    • No problems with it so far
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