Why You Should Consider Buying an Electric Compact ...

By Lars Arnold

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By now, anyone who uses compact equipment has probably caught wind of the push toward electric machines. If you’re unsure whether it’s right for your operation, you may be looking for some advice.

When it comes to compact wheel loaders (CWLs), there are three main reasons to consider going electric: operational benefits, environmental benefits and financial benefits. Let’s take a look at each.

Operational

Some people think an electric machine won’t have as much power as a diesel machine, but that’s just not true. There are brands whose electric model specifications match up with their diesel equivalents. More importantly, early users of electric compact wheel loaders have reported that they’ve experienced no drop in performance compared with a diesel machine.

There are even some ways electric machines outperform diesel models. One of those is the instant torque of electric. When the operator moves the joystick, the response is instantaneous rather than the slight delay that’s common with a diesel machine.

One of the best things about a CWL is its versatility due to its compatibility with multiple attachments, and electric versions are no different. We’ve also heard from operators that the reduced noise and vibration of electric machines makes jobsite communication easier and lessens fatigue.

Runtime is a common question about electric machines, but charging is not as complicated as you might think. Basically, the more power you can put into the machine, the faster it will charge — like filling your vehicle with a fuel pump versus a gas can.

For optimal charging time, it’s best to have a 240-volt, 32-amp Level 2 AC-charging setup that utilizes an SAE J1772 charging adapter or J plug. Before you get worried about the jargon, this is the same setup recommended for electric cars, and 240 volts is what many household appliances run on.

A regular 120-volt outlet should also work depending on the brand of the machine you have, but it will take longer. There are also options like off-board fast chargers and solar-powered chargers. And of course, research and development will provide a wider range of charging options in the coming months and years.

Runtime will vary based on the manufacturer, but the electric compact wheel loaders I’m most familiar with get several hours from a full battery in their most common applications. Another thing to consider is that an electric machine turns off when it’s not in use. So think about how much your diesel compact wheel loaders idle in an average shift versus doing actual work. That electric machine may have more than enough battery to get the job done in a single charge.

Another tip is to not run at full throttle all the time because you usually don’t need excessive power. Run in an appropriate rpm range and you’ll be just fine.

Environmental

Even if sustainability is not a top priority for you, it is to many others. Governments are increasingly enacting clean air regulations, and more project owners are putting sustainability targets into their RFPs. A machine with zero emissions could help you win more bids.

An electric machine could also open up new types of work for you. Just think about all the new and different ways electric CWLs can be used thanks to their zero emissions and significantly lower noise. They can work indoors, in congested areas, near animals and potentially at hours when noise restrictions are in place.

The ability to bid on emission- and noise-restricted jobs is part of a solid long-term business strategy and will help you qualify for applications where conventional machines aren’t welcome. Plus, it’s simply the right thing to do for our environment.

Financial

If you’re concerned about the cost of switching to electric, don’t forget to calculate the total cost of ownership (TCO) and not just the purchase price. Electric machines offer fuel savings, less maintenance and extended component life — and that’s on top of the additional work you may be able to win.

Maintenance is much simpler on an electric machine because there’s no engine to maintain. DEF and other filters also are not needed. Essentially, the only supplies required are grease and hydraulic oil. This is much different than a conventional machine that requires fluid, filter and component checks as often as every day.

Overall, the lifetime of battery-electric components should be equal to or better than that of the diesel engine on a conventional machine. My team conservatively estimates that users will see 35% savings in maintenance cost and time over the life of the electric machines we offer.

I mentioned earlier that many electric machines shut off when not in use. This means they can significantly reduce the accumulation of machine hours compared with diesel machines, which rack up hours while idling. This reduces operating costs — and it can also improve the resale value of the machine.

Summing It Up

Improvements on electric CWLs and charging infrastructure will continue, of course. But they are viable right now, too. Why wait to take advantage of their operational, environmental and financial benefits when you could get started today?

Talk to your dealer or OEM and determine whether an electric compact wheel loader might be a good addition to your lineup.

Lars Arnold is an electromobility product manager for Volvo Construction Equipment. Learn more here!

The Kramer 5055e is capable of working up to 8 hours on a single charge, depending on the application.

As electrification technology continues to advance, so does the range of machine types to which it’s applied. Electrically-powered wheel loaders are among some of the more recent machine introductions.

During this year’s INTERMAT, Wacker Neuson exhibited two electric wheel loaders, the Kramer 5055e and the Wacker Neuson WL20e. Both machines are part of the company’s range of emissions-free equipment and are capable of working up to 8 hours on a single charge, depending on the application. The company had the machines operating within an indoor demo area, demonstrating one of their many benefits—the machines’ ability to be used inside buildings as they produce no emissions. This not only helps increase the applications and environments in which the machines can be used, but also ensures health and safety of those working around the machines. Wacker Neuson SE

The lack of emissions will be an increasingly more important aspect as more cities begin implementing stricter emissions regulations and designating Low Emission Zones (LEZ). Read about Volvo Construction Equipment’s take on the impact of LEZ on the construction industry.

Stefanie Wieland, Head of Group Brand, Marketing & Communication at Wacker Neuson SE, says there are some areas, especially in Europe, in which vehicles with a combustion engine are completely prohibited. Because of this, the availability of electrically powered equipment is important.

In addition, the noise levels of electrically-powered wheel loaders and other equipment is greatly reduced, enabling their use in residential areas or near livestock, further increasing the applications in which they can be used.

Reducing noise and emissions were major factors for Wacker Neuson’s development of its electric wheel loaders—which Wieland says will soon be available in the U.S.—as well as its entire range of zero-emission electric machinery.

Electric wheel loader designs

Wieland says the concept for the WL20e and 5055e electric wheel loaders is based on time-tested large-scale technology used in material handling equipment. The company has chosen to use absorbent glass mat (AGM) battery technology, common in forklifts. It is a closed and maintenance-free lead-acid battery system especially developed for high-demand applications. In addition, Wieland says the weight of the battery provides the benefit of also being used as counterweight.

An integrated onboard charging unit for the battery means customers are not required to have fixed charging stations on site. Instead, users can plug the machine into an outlet and recharge the battery whenever necessary. “This offers maximum flexibility at every site of [use],” says Wieland.

The battery drives two electric motors on the wheel loaders—one for the drive system and one for the working hydraulics. According to Wacker Neuson, power is automatically provided by the respective motor which helps to minimize energy consumption. Wieland says designing the wheel loaders in this manner ensures low operating costs and excellent battery run times.

With an electric motor built into the drive system, high performance and tractive force can be achieved. Meanwhile, the motor for the hydraulics system delivers only the amount of power required for the application at hand, reducing unnecessary power draw. “These motors are particularly energy efficient with degrees of efficiency from 94-97%,” says Wieland.  

Efficiency is an important aspect of electric equipment so as not to deter customers from purchasing such machines. Last year Volvo Construction Equipment (Volvo CE) presented field test results for its LX1 prototype electric hybrid wheel loader which showed an average fuel efficiency improvement of 50%.

The LX1 is a series hybrid machine featuring electric drive motors mounted on the wheels, electric driven hydraulics, a smaller diesel engine, and battery energy storage system. According to Volvo CE, using this combination of technologies enables the significant fuel efficiency increase.  

While still just a prototype, and no concrete plans to bring the machine to market, the LX1 provides a demonstration of potential capabilities for the future. “Volvo CE has long-term plans to develop products and services for electromobility, including electric hybrids and electric sites,” said Scott Young, Electromobility Director at Volvo CE in the press release announcing the field test results. “Although we believe that there will be a major shift towards electric hybrid technology in the future, our customers, quite rightly, want improved efficiency now. This requires a balance in our development activities. Therefore, we are also optimizing more conventional technologies and soft offers which will compete with hybrid technology for some years. Before we launch a machine like the LX1, you can expect to see elements of this design incorporated into our products. This supports short and mid-term developments and requirements while the market continues to accept hybrid technology, technology improves and the cost of new technologies decreases.”

Read more about Volvo CE’s electric work site.

Volvo Construction Equipment

During GIE+EXPO 2017, Avant Tecno introduced its e5 fully-electric battery powered articulated loader. The e5 features a 240Ah (11.5 kWh) lead acid battery and two electric motors—a 6 kW motor for driving the machine and a 2 kW motor for loader boom operation as well as auxiliary hydraulics.

Similar to the Wacker Neuson wheel loaders, the e5 features an integrated battery charger to recharge the battery anywhere a 230V/10A power outlet is available. Operators can also continue using the machine while it’s plugged in and charging. The battery is fully charged in approximately 5 hours, but is capable of reaching 80% capacity in 3 hours, says the company.

Also like the Wacker Neuson machines, the e5 does not produce any emissions, and can be used indoors or outdoors. It offers reduced noise and lower operating costs, as well, as fuel is no longer needed to operate the machine and the electronic componentry used has less wear.

Avant Tecno also offers the e6 battery powered loader as part of its eSeries line of fully-electric loaderselectric loaders which uses a 288 Ah (14.5 kWh) lithium-ion battery. For the e6, customers have the option of a 400V/16A or 400V/32A rapid battery charger. The company says the rapid charger considerably reduces charging time of the battery compared to the built-in charger on the e5; a 100% charge can be achieved within 1 hour.

Avant Tecno USA Inc.Both eSeries wheel loaders include the Avant Tecno Optidrive drive circuit which improves the performance of the machines by as much as 10%. The typical drive system in the company’s loaders consists of a variable displacement hydraulic pump, four hydraulic drive motors—one on each wheel of the loader—and a combination of hydraulic valves, hoses and fittings. Hydraulic oil is used to provide drive power from the machine’s 6 kW electric motor to the four hydraulic drive motors. According to the company, this system offers a lot of pushing power, and a compact design while maintaining a low center of gravity.

Optidrive is the updated version of this drive system, featuring fewer hydraulic hoses and fittings to reduce the amount of heat generated when hydraulic oil flows through it, and thus reduce fuel consumption and power draw from other componentry. Avant Tecno says there are 20% fewer hoses and 60% fewer fittings.

Reducing the number of hydraulic components enables Optidrive to reduce power loss by up to 1.5 kW, roughly 10% of the total power used in the drive circuit. It also helps improve maintenance as there are fewer components that may need fixing or which could prohibit accessibility to other parts of the machine.

Emissions reduction and improved efficiency will continue to be key drivers for equipment design for years to come. With more manufacturers applying electrification technologies to more types of equipment, there will be more options available for end users to get their work done while complying with evolving environmental requirements. 

Additional reading:
10 Things to Consider When Buying dump truck tri axle View Profile

By now, anyone who uses compact equipment has probably caught wind of the push toward electric machines. If you’re unsure whether it’s right for your operation, you may be looking for some advice.

When it comes to compact wheel loaders (CWLs), there are three main reasons to consider going electric: operational benefits, environmental benefits and financial benefits. Let’s take a look at each.

Operational

Some people think an electric machine won’t have as much power as a diesel machine, but that’s just not true. There are brands whose electric model specifications match up with their diesel equivalents. More importantly, early users of electric compact wheel loaders have reported that they’ve experienced no drop in performance compared with a diesel machine.

There are even some ways electric machines outperform diesel models. One of those is the instant torque of electric. When the operator moves the joystick, the response is instantaneous rather than the slight delay that’s common with a diesel machine.

One of the best things about a CWL is its versatility due to its compatibility with multiple attachments, and electric versions are no different. We’ve also heard from operators that the reduced noise and vibration of electric machines makes jobsite communication easier and lessens fatigue.

Runtime is a common question about electric machines, but charging is not as complicated as you might think. Basically, the more power you can put into the machine, the faster it will charge — like filling your vehicle with a fuel pump versus a gas can.

For optimal charging time, it’s best to have a 240-volt, 32-amp Level 2 AC-charging setup that utilizes an SAE J1772 charging adapter or J plug. Before you get worried about the jargon, this is the same setup recommended for electric cars, and 240 volts is what many household appliances run on.

A regular 120-volt outlet should also work depending on the brand of the machine you have, but it will take longer. There are also options like off-board fast chargers and solar-powered chargers. And of course, research and development will provide a wider range of charging options in the coming months and years.

Runtime will vary based on the manufacturer, but the electric compact wheel loaders I’m most familiar with get several hours from a full battery in their most common applications. Another thing to consider is that an electric machine turns off when it’s not in use. So think about how much your diesel compact wheel loaders idle in an average shift versus doing actual work. That electric machine may have more than enough battery to get the job done in a single charge.

Another tip is to not run at full throttle all the time because you usually don’t need excessive power. Run in an appropriate rpm range and you’ll be just fine.

Environmental

Even if sustainability is not a top priority for you, it is to many others. Governments are increasingly enacting clean air regulations, and more project owners are putting sustainability targets into their RFPs. A machine with zero emissions could help you win more bids.

An electric machine could also open up new types of work for you. Just think about all the new and different ways electric CWLs can be used thanks to their zero emissions and significantly lower noise. They can work indoors, in congested areas, near animals and potentially at hours when noise restrictions are in place.

The ability to bid on emission- and noise-restricted jobs is part of a solid long-term business strategy and will help you qualify for applications where conventional machines aren’t welcome. Plus, it’s simply the right thing to do for our environment.

Financial

If you’re concerned about the cost of switching to electric, don’t forget to calculate the total cost of ownership (TCO) and not just the purchase price. Electric machines offer fuel savings, less maintenance and extended component life — and that’s on top of the additional work you may be able to win.

Maintenance is much simpler on an electric machine because there’s no engine to maintain. DEF and other filters also are not needed. Essentially, the only supplies required are grease and hydraulic oil. This is much different than a conventional machine that requires fluid, filter and component checks as often as every day.

Overall, the lifetime of battery-electric components should be equal to or better than that of the diesel engine on a conventional machine. My team conservatively estimates that users will see 35% savings in maintenance cost and time over the life of the electric machines we offer.

I mentioned earlier that many electric machines shut off when not in use. This means they can significantly reduce the accumulation of machine hours compared with diesel machines, which rack up hours while idling. This reduces operating costs — and it can also improve the resale value of the machine.

Summing It Up

Improvements on electric CWLs and charging infrastructure will continue, of course. But they are viable right now, too. Why wait to take advantage of their operational, environmental and financial benefits when you could get started today?

Talk to your dealer or OEM and determine whether an electric compact wheel loader might be a good addition to your lineup.

Lars Arnold is an electromobility product manager for Volvo Construction Equipment. Learn more here!

The company is the world’s best tri axle dump truck supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

The Kramer 5055e is capable of working up to 8 hours on a single charge, depending on the application.

As electrification technology continues to advance, so does the range of machine types to which it’s applied. Electrically-powered wheel loaders are among some of the more recent machine introductions.

During this year’s INTERMAT, Wacker Neuson exhibited two electric wheel loaders, the Kramer 5055e and the Wacker Neuson WL20e. Both machines are part of the company’s range of emissions-free equipment and are capable of working up to 8 hours on a single charge, depending on the application. The company had the machines operating within an indoor demo area, demonstrating one of their many benefits—the machines’ ability to be used inside buildings as they produce no emissions. This not only helps increase the applications and environments in which the machines can be used, but also ensures health and safety of those working around the machines. Wacker Neuson SE

The lack of emissions will be an increasingly more important aspect as more cities begin implementing stricter emissions regulations and designating Low Emission Zones (LEZ). Read about Volvo Construction Equipment’s take on the impact of LEZ on the construction industry.

Stefanie Wieland, Head of Group Brand, Marketing & Communication at Wacker Neuson SE, says there are some areas, especially in Europe, in which vehicles with a combustion engine are completely prohibited. Because of this, the availability of electrically powered equipment is important.

In addition, the noise levels of electrically-powered wheel loaders and other equipment is greatly reduced, enabling their use in residential areas or near livestock, further increasing the applications in which they can be used.

Reducing noise and emissions were major factors for Wacker Neuson’s development of its electric wheel loaders—which Wieland says will soon be available in the U.S.—as well as its entire range of zero-emission electric machinery.

Electric wheel loader designs

Wieland says the concept for the WL20e and 5055e electric wheel loaders is based on time-tested large-scale technology used in material handling equipment. The company has chosen to use absorbent glass mat (AGM) battery technology, common in forklifts. It is a closed and maintenance-free lead-acid battery system especially developed for high-demand applications. In addition, Wieland says the weight of the battery provides the benefit of also being used as counterweight.

An integrated onboard charging unit for the battery means customers are not required to have fixed charging stations on site. Instead, users can plug the machine into an outlet and recharge the battery whenever necessary. “This offers maximum flexibility at every site of [use],” says Wieland.

The battery drives two electric motors on the wheel loaders—one for the drive system and one for the working hydraulics. According to Wacker Neuson, power is automatically provided by the respective motor which helps to minimize energy consumption. Wieland says designing the wheel loaders in this manner ensures low operating costs and excellent battery run times.

With an electric motor built into the drive system, high performance and tractive force can be achieved. Meanwhile, the motor for the hydraulics system delivers only the amount of power required for the application at hand, reducing unnecessary power draw. “These motors are particularly energy efficient with degrees of efficiency from 94-97%,” says Wieland.  

Efficiency is an important aspect of electric equipment so as not to deter customers from purchasing such machines. Last year Volvo Construction Equipment (Volvo CE) presented field test results for its LX1 prototype electric hybrid wheel loader which showed an average fuel efficiency improvement of 50%.

The LX1 is a series hybrid machine featuring electric drive motors mounted on the wheels, electric driven hydraulics, a smaller diesel engine, and battery energy storage system. According to Volvo CE, using this combination of technologies enables the significant fuel efficiency increase.  

While still just a prototype, and no concrete plans to bring the machine to market, the LX1 provides a demonstration of potential capabilities for the future. “Volvo CE has long-term plans to develop products and services for electromobility, including electric hybrids and electric sites,” said Scott Young, Electromobility Director at Volvo CE in the press release announcing the field test results. “Although we believe that there will be a major shift towards electric hybrid technology in the future, our customers, quite rightly, want improved efficiency now. This requires a balance in our development activities. Therefore, we are also optimizing more conventional technologies and soft offers which will compete with hybrid technology for some years. Before we launch a machine like the LX1, you can expect to see elements of this design incorporated into our products. This supports short and mid-term developments and requirements while the market continues to accept hybrid technology, technology improves and the cost of new technologies decreases.”

Read more about Volvo CE’s electric work site.

Volvo Construction Equipment

During GIE+EXPO 2017, Avant Tecno introduced its e5 fully-electric battery powered articulated loader. The e5 features a 240Ah (11.5 kWh) lead acid battery and two electric motors—a 6 kW motor for driving the machine and a 2 kW motor for loader boom operation as well as auxiliary hydraulics.

Similar to the Wacker Neuson wheel loaders, the e5 features an integrated battery charger to recharge the battery anywhere a 230V/10A power outlet is available. Operators can also continue using the machine while it’s plugged in and charging. The battery is fully charged in approximately 5 hours, but is capable of reaching 80% capacity in 3 hours, says the company.

Also like the Wacker Neuson machines, the e5 does not produce any emissions, and can be used indoors or outdoors. It offers reduced noise and lower operating costs, as well, as fuel is no longer needed to operate the machine and the electronic componentry used has less wear.

Avant Tecno also offers the e6 battery powered loader as part of its eSeries line of fully-electric loaders which uses a 288 Ah (14.5 kWh) lithium-ion battery. For the e6, customers have the option of a 400V/16A or 400V/32A rapid battery charger. The company says the rapid charger considerably reduces charging time of the battery compared to the built-in charger on the e5; a 100% charge can be achieved within 1 hour.

Avant Tecno USA Inc.Both eSeries wheel loaders include the Avant Tecno Optidrive drive circuit which improves the performance of the machines by as much as 10%. The typical drive system in the company’s loaders consists of a variable displacement hydraulic pump, four hydraulic drive motors—one on each wheel of the loader—and a combination of hydraulic valves, hoses and fittings. Hydraulic oil is used to provide drive power from the machine’s 6 kW electric motor to the four hydraulic drive motors. According to the company, this system offers a lot of pushing power, and a compact design while maintaining a low center of gravity.

Optidrive is the updated version of this drive system, featuring fewer hydraulic hoses and fittings to reduce the amount of heat generated when hydraulic oil flows through it, and thus reduce fuel consumption and power draw from other componentry. Avant Tecno says there are 20% fewer hoses and 60% fewer fittings.

Reducing the number of hydraulic components enables Optidrive to reduce power loss by up to 1.5 kW, roughly 10% of the total power used in the drive circuit. It also helps improve maintenance as there are fewer components that may need fixing or which could prohibit accessibility to other parts of the machine.

Emissions reduction and improved efficiency will continue to be key drivers for equipment design for years to come. With more manufacturers applying electrification technologies to more types of equipment, there will be more options available for end users to get their work done while complying with evolving environmental requirements. 

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