Global concerns over urban air quality and carbon emissions are prompting public transit to reconsider energy sources. Municipalities looking for potential operational cost savings are also considering electric buses.
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But what is an electric bus, and how does it work? This guide will discuss the advantages and disadvantages of electric buses, and provide more insights into sustainable public transport.
An electric bus is a passenger transit vehicle powered by an electric motor. Instead of an internal combustion engine, electric buses store the electricity needed to power the vehicle in a battery. As a result, an electric bus is also called a battery-electric bus (BEB). The electric motor serves as both the engine and transmission.
The electric bus is popular in China, where 17% of the country’s total fleet was a BEB in . While there were 421,000 buses on the road in mainland China, there were only 300 in the U.S. and 2,250 in Europe.
A signal is sent to the powertrain system controller upon starting the bus. That signal powers up the high-voltage battery and converts it into electrical energy, which powers the electric motor and thermal management system.
The battery is effectively the fuel tank of the electric bus. So, the size of the battery correlates to how far the bus can go without recharging.
How the bus is used also factors into the battery charge, known as its duty cycle. You might think of a duty cycle this way:
A light-duty cycle will burn a lot less energy than a heavy-duty cycle.
Along with your speed, weight transported, and road conditions, other factors can impact the duty cycle of electric buses. Factors include driving and weather conditions, the number of stops and starts, elevation changes, how quickly the bus accelerates, and more.
Most electric buses are operated in urban environments. They don’t need to go at highway speed. They can reach 40 to 45 mph but will average lower speeds. The higher the speed, the shorter the range.
The time it takes for an electric bus to fully charge depends on the type of charger.
There are two main types of electric bus chargers: plug-in chargers and pantograph chargers.
A plug-in charger can charge an electric bus in two to eight hours. The charger can be either direct current (DC) or alternating current (AC). AC chargers are slower but more affordable, while DC chargers can charge batteries up to 150 KW.
A pantograph charger is more powerful. The buses drive underneath the robotic arm of a pantograph charger, which attaches to the electrical conductors on top of the vehicle for a quick charge. These types of stations may be found on a bus’s route to enable electric bus charging without the driver having to return to the lot.
Pantograph chargers carry more current for faster charging. They use DC that can charge up to 350 KW.
The cost of an electric bus charging station depends on the type of charge used. A DC charger is more expensive, as the voltage is higher and more volatile.
According to one estimate, plug-in chargers can cost between $2,000 and $5,000 for the equipment, and $1,000 to over $10,000 for installation, depending on the complexity. Meanwhile, DC fast chargers are more expensive at around $10,000 to $15,000 for more basic equipment, and more than $40,000 for larger, more powerful stations. They also require a three-phase power supply, so installation costs are typically higher as well — ranging from $4,000 to $15,000 on the lower end to over $50,000 for larger, more complex projects.
Keep in mind that one charger can service six to eight buses per hour, depending on route scheduling.
The many advantages of electric buses help explain their growing popularity. Let’s look at some of the main ones in greater detail.
Electric vehicles are more energy efficient and have zero carbon emissions. This not only helps public health but can reduce the risk of global warming.
Electric buses don’t need to gas up. The battery is their fuel. And without the internal combustion engine or diesel fuel, you can expect lower maintenance costs. The useful lifespan of an electric bus is around 12 years, per manufacturer Gregory Poole.
If you’re at a NASCAR event, you’re expecting to hear the roar of the engine. However, passenger transit riders don’t need to hear that gas-guzzling engine’s roar. Instead, they can enjoy a quieter, zippier ride around the city while commuting to work or getting to school.
When drivers apply the brakes on an electric bus, they give the battery more juice. The bus is designed to capture that kinetic energy and put it back into the battery. This helps the bus to run more efficiently and lowers wear on the braking system.
Electric trolleys, which you may have seen in Zurich in Switzerland, or San Francisco in the United States, or Toronto in Canada, get their power from the overhead wires. Electric buses, on the other hand, store the electricity needed in batteries.
Still, there are disadvantages of electric buses. We address these concerns next.
We’ve discussed the advantages of electric buses, but there are some disadvantages to consider too. As technology advances, expect manufacturers to continue to address these issues.
Since the technology is still new and only a few electric bus manufacturers exist, the prices are higher. Additionally, you’ll need to factor in the price of the electric charging stations.
It doesn’t take long to fill up a diesel fuel tank, but it can take hours to charge an electric bus. A fast charge electric bus may be able to restore an hour’s worth of energy usage within 10 minutes. However, that battery will have a diminished operation range.
Electric buses can only go so far before they need to recharge. Mass Transit defines an Extended Range Battery-Electric Bus as one that can operate for over 80 miles before it needs to recharge.
Unlike diesel buses, electric buses need to use an electric charging station to recharge, which can be more inconvenient to find compared to a diesel gas station.
Electric buses can be challenged by extreme weather conditions or hilly routes. Bloomberg reported the Minnesota Valley Transportation Authority (MVTA) had difficulties with electric buses maintaining a full day’s charge in the cold of winter.
As already discussed, when comparing electric buses to diesel buses, the cost is a big factor. The electric bus is more expensive upfront, although there are many manufacturer incentive programs. You’ll save money over the life of the electric bus, as you can enjoy lower fuel costs and maintenance costs.
With diesel buses, you don’t have to worry about range or about the road and weather conditions.
Verified Market Research predicts positive growth in the global electric bus market in the near future. Having valued the market at USD 102.71 thousand in , VMR projected the market will reach USD 686.31 thousand by , growing at a CAGR of 26.8% from to .
VMR identified the following electric bus companies as top players:
Electric buses can help you realize cost savings and contribute to a cleaner, healthier environment. Fleet management software can help you make the most of your electric bus operations.
Sustainability is one of the reasons to adopt electric buses. Motive supports sustainable logistics with features that:
Motive’s fleet management solution also improves fleet safety by helping you recognize accident risk factors such as:
Electric buses are bursting onto the scene for cities, private transit companies and schools looking for an alternative to traditional buses. These buses are more eco-friendly and can also save you money over time, so it’s no wonder they are gaining popularity. By some estimates, close to half of the world’s city bus fleet could consist of electric buses by . That would be about 1.2 million electric buses, up from 386,000 electric buses in .
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If you’re interested in adding some electric buses to your school’s fleet, keep reading. We’re going to share important information about how electric buses work and answer some common questions about electric buses, so you can make an informed decision.
An electric bus is a type of electric vehicle (EV), meaning it is fueled by electricity rather than other fuel types like diesel fuel or gasoline. Unlike a hybrid vehicle, which combines battery power with an internal combustion engine, an electric bus relies solely on electricity for power. For this reason, electric vehicles are sometimes referred to as “all-electric vehicles” to make it clear that they do not combine electricity with any other type of power.
View Our New Electric BusesElectric buses are a newer alternative to more traditional buses, but they are becoming a popular option for cities, private transportation companies and school districts that want to take advantage of EV technology. Electric buses cost more initially than other kinds, but they can save money over time.An electric bus draws electricity from the power grid and stores it in a battery that can be recharged once the electricity has been used up. This basically mirrors the way our electronics work. We plug them in and let the battery charge and then use them wirelessly until it’s time to charge again.
The main difference between an electric bus and our cell phones and laptops is that the electrically charged battery powers an electric motor in the bus. “The wheels on the bus go round and round,” thanks to this electric motor. More precisely, when the bus driver’s foot presses on the accelerator, the battery powers the motor, which powers the gears that rotate the bus’s tires.
In a traditional bus, a motor works along with an alternator, but an electric motor in an EV has the double function of acting as an alternator and motor. This is possible because the voltage of an AC signal can easily be increased or decreased.
From the driver’s perspective, an electric bus functions essentially like any other type of bus. There is no special way of operating it. Of course, when it’s time to refuel, this is when the difference becomes obvious, but it’s a process that EV drivers quickly become used to.
If you’re considering an electric bus for your school, you’ll want to know about the benefits of electric buses. Why should you consider an electric bus over more traditional options? There are advantages and disadvantages to consider with any type of bus — diesel, propane, gasoline, electric or otherwise — so it’s always smart to compare these options and see which is the best fit for your needs. When it comes to electric buses, there are some valuable benefits to consider. Electric buses are eco-friendly, quiet, low-maintenance and affordable.
One of the main reasons to consider an electric bus over other options is how eco-friendly they are. Compared to combustion engines that run on fuel like diesel, an electric vehicle will have a minimal impact on the environment.
Environmental friendliness is also a benefit of hybrid electric buses, but hybrid buses still burn fuel and, therefore, don’t have zero emissions like an all-electric bus does. When your priority is choosing a bus that will contribute to a healthier environment, an electric bus is the clear choice.
One thing you might notice the first time you drive or ride on an electric bus is how quiet it is. Electric buses operate far more quietly than other types of buses with internal combustion engines. This is always a nice feature of electric vehicles, but it can be a major benefit when it comes to school buses.
School bus drivers in an electric bus are better able to hear what is going on in the seats behind them. This can help drivers feel more of a sense of control and can increase the level of accountability among students on board. A quieter operation can also help drivers maintain better focus on the road.
Another major advantage of electric buses is how little maintenance they require. Many of the maintenance tasks needed with a diesel or gas-powered bus are unnecessary with an electric bus. When performing maintenance on an electric bus, you can eliminate:
Additionally, you won’t have to change the coolant as often, and you can get a longer lifespan out of the brake pads. Overall, electric vehicles are extremely low-maintenance compared to other vehicles. Fewer maintenance needs can translate directly into cost savings. It also means buses in your fleet can stay on the road and don’t have to be out of commission at the auto shop as often.
Some schools may shy away from purchasing electric buses because they cost more than other bus models. These buses do require a larger upfront investment, but they can also save you money over time. Electric buses save money by minimizing maintenance costs and eliminating fuel costs.
These cost savings can add up to around $39,000 per year, which is more than enough to cover the additional cost of an electric vehicle over the bus’s lifetime. You can also offset the cost with government subsidies, tax breaks and grants from your power supply company. Now is a great time to purchase electric vehicles because you can benefit from these financial incentives.
Since electric buses are still a relatively new product, many people are skeptical about the idea of adding electric buses to their fleet. Fortunately, we’re here to answer those questions, so you can feel assured that electric buses are a practical option for your school.
Electric vehicles have been around for much longer than most people realize. Inventors were working on developing electric vehicles in the mid-19th century. By the late 19th century, electric cars had become practical. William Morrison created the first successful EV in the U.S. and generated some interest in electric vehicles. In the early 20th century, electric cars made up about a third of all vehicles on the road in the U.S.
Gas-powered vehicles continue to dominate the market, but electric vehicles have experienced a resurgence in popularity in recent years. Although the technology for electric vehicles has been around for a while, all-electric buses are a more recent innovation. It’s difficult to pinpoint when the first electric bus was made, though we do know some early bus manufacturers built gasoline-electric models. All-electric buses have only recently emerged, however, as a solid alternative to more standard options. Blue Bird was the first manufacturer to market electric school buses in .
To look at something’s carbon footprint, you should consider its whole life cycle. What sort of impact does it have on the environment throughout its manufacturing, operation, maintenance and disposal? Fortunately, electric buses have an impressively small carbon footprint compared to other buses, making them a great option for schools or cities trying to make a concentrated effort to go green.
All-electric buses also have lower emissions over the course of their life cycle compared to natural gas and diesel-hybrid buses. Blue Bird’s electric school buses produce zero emissions. Of course, the electricity grid itself contributes some emissions. According to the Union of Concerned Scientists, an electric bus that is charged by the national electricity mix will produce 1,078 grams CO2e per mile. Compare that to 2,364 grams CO2e per mile for natural gas and 2,212 grams CO2e per mile for a diesel hybrid.
Whereas usage is the lifecycle stage that accounts for around 90% of a diesel bus’s climate impact, for an all-electric bus, usage could only account for 30%, and that’s out of a much lower total climate impact. Still, this means if you want your electric bus to have as small a carbon footprint as possible, it’s important to focus on the manufacturing part of its lifecycle and purchase from a manufacturer that uses environmentally responsible methods.
How much energy it takes to run an electric bus depends on a few factors. Just as other types of buses have varying levels of fuel economy, you’ll find varying levels of electricity consumption for electric buses. It also depends on factors like the topography on your route and whether you’re running air conditioning or heat.
In one test, 18-meter electric buses used between 1.65 and 1.84 kilowatt-hours per kilometer traveled. In this scenario, buses were running air conditioning, which accounted for part of the energy consumption.
Most electric buses today use a lithium-ion battery. This battery technology has dropped dramatically in price over the last decade, making it more accessible. This is the same type of battery used in laptops and cellphones. Lithium-ion batteries offer some important advantages that have made it the battery of choice, such as how lightweight it is, how much energy it can hold and how it can be recharged.
When a lithium-ion battery is charging, lithium ions move from the cathode to the anode. When you’re drawing power from the battery, the opposite occurs: the anode releases lithium ions to the cathode. Although modern lithium-ion batteries can hold an impressive amount of energy for their size, they still need to be recharged periodically so you can keep your bus on the road.
For schools considering electric buses, one of the most important questions is, how many miles can an electric school bus go? Will it be able to complete its route without needing a charge? The number of miles an electric bus can travel depends on the bus and particularly on its battery’s power density. It also depends on how much idling is included in your trip and what type of terrain you’re covering, among other factors.
That said, it is possible to estimate how far a bus can go on a single charge. Blue Bird’s electric school buses can travel up to 120 miles on a single charge. With intentional planning, drivers should never have to worry about being stranded due to a drained battery. Since electric buses can now travel farther than ever before, they are a practical option to consider.
Electric buses charge in the same way that smaller electric vehicles do: by connecting to a charging station. The standard connection for modern EVs and chargers is called the SAE J. Electric buses should be equipped with this standard receptacle, which allows you to connect to any Level 1 or Level 2 charger. These levels denote how fast the station can charge your vehicle. Level 2 charging stations are preferable for electric buses since they use a 240 V or 208 V plug for faster charging.
DC Fast Charge stations can provide even faster charging. These stations use a 480 V AC input. It is far less common to have electric vehicles that can connect to these stations since this connection requires special equipment. There is also currently no standard connector for plugging into a DC Fast Charge station. In the future, wireless charging may become more widely available. This charging method uses an electromagnetic field to charge an electric vehicle’s battery.
Many cities are seeing public charging stations pop up as EVs gain popularity. When you’re trying out an electric school bus for the first time, you may want to take advantage of public charging stations. However, when electric buses become a significant part of your fleet, you’ll want to install your own charging stations on site. You don’t necessarily need a charging station for every electric bus in your fleet. You may be able to have a rotating schedule, so multiple buses can take turns charging on the same station.
How long it takes to charge an electric bus depends on the bus and the charging station. A smaller battery designed for shorter trips and more frequent charging will typically take less time to charge than a battery that holds more energy for longer trips. Even for buses with the same battery, some charging stations can charge a vehicle more quickly than others.
For an electric bus, typically, you’ll be charging with a Level 2 charger. Using one of these chargers, Blue Bird Electric buses can reach a full charge in around six to eight hours. This length of time makes overnight charging especially convenient. With a CCS1 plug connected to a DC Fast Charging Station, Blue Bird electric buses can charge in just three hours.
As with other types of buses, the lifespan of an electric bus depends on the amount of use and wear it experiences, along with other factors. Generally, though, the useful life expectancy of an electric bus is around 12 years, which is about the same life expectancy you can expect with other types of school buses.
However, the battery may need to be replaced during that 12-year span. Batteries that need replacing can still serve a useful purpose in storing energy for several more years before being recycled.
Because electric buses don’t have any emissions from burning fossil fuels, they don’t contribute to air pollution in the way that other buses do. This means they can help make a city’s air cleaner and healthier overall. In addition to these large-scale effects, an electric bus can be healthier in a more localized sense, too.
For people standing near the bus, they won’t have to inhale diesel exhaust fumes, which can cause negative health effects. These health effects are worse for children, making this something to consider even more when it comes to a school bus. While you can mitigate the health risks of a diesel bus by avoiding inhaling the exhaust fumes, overall, an electric bus is a healthier alternative to consider.
Electric buses may be commonplace in the near future, but for now, most people look around and don’t see many electric buses on the road. This is mainly because, as with any new innovation, electric buses will take time to fully catch on.
For now, a lack of familiarity discourages some schools from giving electric buses a try. Change always seems more difficult than sticking to the status quo, but schools that choose to make the jump to electric buses can cash in on some real benefits. You don’t need to wait until electric buses are more commonplace.
If you’re located in North Carolina, Gregory Poole is your source for electric school buses. We have a fleet of new electric buses from Blue Bird Corporation. Blue Bird has been setting industry standards since and has developed a reputation for innovation. Their electric school buses maintain the same standards of safety and quality you’ll find in their other buses, along with the unique benefits of an electric vehicle.
Gregory Poole is the authorized Blue Bird bus dealer for all of North Carolina and has been in business for over 65 years. We’re a partner you can trust for quality electric buses for your school. Contact us today to learn more.
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