Guide to Trailer-Mounted Generators

Do you need a moveable generator that you can transport between job sites? A portable trailer-mounted generator offers you greater flexibility than a permanent stationary generator solution. These towable generators are common on construction sites, mining operations, military bases and other semi-permanent job sites. All you need to do is hitch it to the back of a vehicle and transport it to your site. These generators offer valuable benefits such as versatility, portability and enough wattage to power multiple tools and devices.

Benefits of Portable Trailer Mounted Generators

Portable generators offer some great features for people who may be looking for a short term power solution. Consider the following benefits of a trailer-mounted generator:

Transportable

Unlike standby generators which are usually stationary and installed on site at a facility, towable generators are easy to transport from location to location. For example, if you are working on a construction site that doesn’t have power, a trailer-mounted generator can provide the power you need on your temporary job site. Towable generators hitch to the back of your vehicle, so you can easily haul it from site to site and store it when you don’t need it.

Powerful

Portable generators come in various sizes from small to large kW ratings to provide power based on job requirements. If you’re working on a big project and need to power multiple tools, a portable generator can be sized to give you the power supply you need. Equipped with a diesel base tank on-board, you can run the equipment from site to site and if you’re working on a project for a longer duration, you can connect the portable generator to an external fuel tank to ensure that

Versatile

Because of their portability, towable portable generators are versatile — you can use them for many different applications, from events to construction sites. They also come in multiple models and power output levels that include various features, so you can choose one that suits your needs.

What Is a Trailer-Mounted Generator?

As the name suggests, a trailer-mounted generator is attached to a custom trailer and ball hitch, making it capable to tow the unit from location to location as needs arise. These generators can meet application needs from small to medium-sized construction sites, disaster recovery projects, events or for backup power to larger facilities like hospitals, hotels, emergency services, manufacturing & processing plants, and more.

A trailer-mounted generator is relatively easy to move around and safe to transport on public roads as it meets requirements from the Department of Transportation (DOT). It includes features such as brake and signal lights, a safety chain or more heavy duty connectors for larger trailers and a license plate holder.

What Is a Portable Skid-Mounted Generator?

Unlike a portable trailer mounted generator, a portable skid-mounted generator needs to be hoisted onto a job site. It features large reinforced lifting eyes for a crane to attach to it or for smaller units such a portable skid-mounted generator light towers – need forklift pockets. Similar to portable trailer mounted generators and stationary generators installed outside facilities, they come with enclosures that help reduce noise and protect the generator from the elements. They are suitable for use for many different applications such as construction sites, mining operations, utilities, and even new construction. The smaller footprint can take up less space than a trailer-mounted generator while ensuring you have the power you need and some can even be paralleled to provide more power to a project site.

What to Look for in a Portable Trailer Mounted Generator

Before you purchase your towable portable generator, you’ll want to research to find one that matches your requirements. Consider the following factors before buying a tow-behind generator.

• Power output: When it comes to a generator’s output, you need to consider its rated output and maximum output. The rated output or running power is the power the generator can consistently provide to power tools and appliances. The maximum output or surge power is the power a generator produces to start up tools. These power levels should match the amount you need to power your tools and devices.
• Fuel type and capacity: While towable generators generally run on diesel, there some varieties that run on natural gas and propane. Before purchasing, consider what fuel you want your generator to use. Some models may offer two fuel types known as a bi-fuel generator, but most include a single fuel option. Pay attention to the fuel tank’s size, power requirements, and estimated average running time to know how long you can run your generator before needing to refuel.
• Size and weight: Even though all tow-behind generators are designed to be towed by a vehicle, the size of the generator will determine what class of vehicle you’ll need to haul it. For example many of the small to mid-sized generators can be towed by SUV or a pickup truck, whereas a larger portable generator such as those installed in 20′ or 30′ ISO containers will require a truck with sufficient horsepower, hauling capability, and specialized hitch.
• Noise level: Depending on how you’ll use your generator, you may want to consider its noise level. Diesel generators in generator are loud when running and get louder the bigger you go. Although some generators are designed to be quieter, which is ideal for areas with noise level regulations – it’s important to consider application and location. For example, a slightly noisier generator may not be an issue on a remote construction site, but can be problematic if used in an urban area with a high population density.
• Voltage selector switch: A voltage switch selector can provide flexibility when out on a remote project site. The voltage selector switch enables you to switch between voltages if there are specific requirements for certain tools when on a job site.

How to Safely Operate Portable Generators

Knowing how to safely operate your generator helps to keep you and your employees from potential risks. Consider the following factors for safe operation:

• Read the owner’s manual: Familiarize yourself with the safety rules. The manual will direct you on what to do and what not to do when operating your generator.
• Keep it outside: You should always place your generator outside when operating it. Even if you are powering tools indoors, never put your generator inside, as this can cause a dangerous build-up of carbon monoxide.
• Allow for plenty of ventilation: When running the generator, place it in an area that allows ample ventilation. If you are concerned about safety, you can install a carbon monoxide detector as an added safety feature.
• Place it on even ground: When positioning your towable generator, choosing the right surface is important. If possible, choose a parking lot or cement work area as a stable surface to set your generator. Place blocks behind the wheels to keep it from rolling away.
• Install an automatic transfer switch: If you are in an area that regularly experiences power outages, consider installing an automatic transfer switch (also known as an ATS). As the name suggests, this switch automatically prompts the generator to run during a power outage. It will then disconnect the generator once the power is restored. The switch also separates the generator from the power line, keeping you and any utility workers safe from the potential of backfeeding.
• Use caution operating it in the rain: It’s important to exercise extreme caution when you’re expected to operate a portable generator in wet weather. Generators produce high voltages that can be fatal if connected, handled, operated, or used improperly. Check out some safety tips for operating a portable generator in wet weather and also be sure to consult an expert or have a professional on-site to handle a portable generator especially when inclement weather is an expected factor.

Grounding A Portable Generator

Part of safely operating your generator is knowing how to ground it. Grounding a generator involves attaching a copper grounding wire to the neutral electric conductor terminals. This wire moves faulty electricity from the generator to the ground, keeping you and your equipment safe. All portable generators need grounding. Failing to do so can result in:

• Overheating of devices which can cause fire
• You or your employees getting an electric shock
• Electrical overload which can damage the generator
• Explosion caused by stray electricity contacting fuel tanks

While every situation may differ, here are some general steps that can help you to ground your generator successfully.

1. Install the rod: Use a hammer to install the rod into the ground to the correct depth according to local electrical codes. If rocks are in the ground, you can install the rod at an angle not exceeding 45 degrees. Cover any remaining rod parts with a protective clamp to keep people around it safe while the generator runs.
2. Remove insulation off the copper wire: Before coiling the copper wire on the ground round, you’ll need to strip off 6-12 inches of insulation.
3. Coil the copper wire: Use a pair of pliers to coil the copper wire around the ground rod.
4. Attach the copper wire: While the generator is off, loosen the grounding bolt and twist the copper wire tightly around it. Then, tighten the bolt using a wrench.
5. Test the connection: Once done, it’s best to have an electrician test the connection. An ohmic resistance of zero indicates a stable connection.

Browse Portable Generators at Woodstock Power

Power outages can be a major inconvenience for your operations. A portable generator offers a convenient solution that you can transport to different job sites. While these generators are smaller than permanent ones, they still provide enough power to run multiple tools and devices.

At Woodstock Power, we stock a range of used portable generators to keep your operations going in unexpected power interruptions. We also offer generator rentals. If you’re looking for portable generator services near you, Woodstock Power can help. To learn more about your options, get in touch with us today!