Mar. 17, 2025
Automobiles & Motorcycles
Global electric vehicle sales continue to be strong, with 4.3 million new Battery Electric Vehicles and Plug-in Hybrids delivered during the first half of , an increase of 62% compared to the same period in .
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The growing number of electric vehicles on the road will lead to exciting changes to road travel and the EV charging infrastructure needed to support it. One of the more notable changes to the infrastructure we are seeing is the combination of EV charging equipment with battery energy storage systems.
The electrical network is far and wide. However, only some parts of the electrical grid are set up to support EV charging. With larger electric vehicle batteries and the growing demand for faster EV charging stations, access to more power is needed. There are 350kW + DC fast chargers, which could quickly draw more power than the electrical grid can supply in multiple locations. Fortunately, there is a solution, and that solution is battery energy storage.
The battery energy storage system can support the electrical grid by discharging from the battery when the demand for EV charging exceeds the capacity of the electricity network. It can then recharge during periods of low demand. Using battery energy storage avoids costly and time-consuming upgrades to grid infrastructure and supports the stability of the electrical network.
Using batteries to enable EV charging in locations like this is just one-way battery energy storage can add value to an EV charging station installation. Let's look at the other benefits of using battery energy storage with electric vehicle charging stations.
Battery energy storage can shift charging to times when electricity is cheaper or more abundant, which can help reduce the cost of the energy used for charging EVs. The battery is charged when electricity is most affordable and discharged at peak times when the price is usually higher. The energy consumption is the same in kWh. However, electricity use has shifted from an expensive peak rate to a less costly off-peak rate.
This gives a competitive advantage as you have paid less for your energy than nearby EV charging stations, meaning you can either be more competitive on pricing to attract more EV drivers or maximize profitability per charge.
As you can see below diagram, the same amount of energy consumption is shifted from the peak rate to the off-peak rate.
As well as being charged for your energy consumption in kWh from your utility company, you will often be charged for your peak power usage in kW. This is the amount of power you draw from the electric grid in any 15-minute period. Battery energy storage systems can help reduce demand charges through peak shaving by storing electricity during low demand and releasing it when EV charging stations are in use. This can dramatically reduce the overall cost of charging EVs, especially when using DC fast charging stations. You can effectively 'shave' the peak demand, as illustrated in the diagram below. Discover more about lowering demand charges.
Battery energy storage can provide backup power to charging stations during power outages or other disruptions, ensuring that EVs can be charged even when the grid is unavailable. This is especially important in emergency or evacuation situations; governments and municipalities must ensure that essential electric vehicle charging infrastructure can work during these events. The below diagram shows the difference between EV charging with battery energy storage and those without.
Battery energy storage can increase the charging capacity of a charging station by storing excess electricity when demand is low and releasing it when demand is high. This can help to avoid overloading the grid and reduce the need for costly grid upgrades. In the example below, you will see that you can effectively increase the output power by adding battery energy storage. In this application sizing the battery energy storage system based on available grid power and EV charging demand is very important to ensure the battery can be charged in times of low demand.
Battery energy storage can store excess renewable energy generated by solar or wind and release it when needed to power EV charging stations. This can help increase renewable energy use and reduce reliance on fossil fuels. Using renewable energy sources and energy storage to power EV charging stations makes it possible to reduce greenhouse gas emissions and improve the overall sustainability of the transportation sector. Renewable energy, energy storage, EV charging, and clean energy generation are keys to reaching global Net-Zero targets.
As mentioned earlier in this article, by storing excess electricity and releasing it when needed, battery energy storage can help smooth out fluctuations in demand and supply on the grid, improving overall grid stability and reliability.
Battery energy storage systems can improve the overall efficiency of EV charging stations by reducing the amount of electricity lost during transmission and helping to optimize the charging process.
With battery energy storage systems in place, EV charging stations can provide reliable, on-demand charging for electric vehicles, which is essential in locations where access to the electric grid is limited or unreliable. This can help to improve the overall convenience of EV charging for users and help enable EV charging anywhere.
Below is a video of an EVESCO battery energy storage system installed with DC fast charging stations.
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Combing energy storage for EV charging has several benefits, as highlighted above, and as electric vehicle ownership grows, so will the demand for this type of infrastructure. We at EVESCO are excited about this innovative combination of technologies and are on hand to help you meet your EV charging needs.
All forms of electric vehicles (EVs) can help improve fuel economy, lower fuel costs, and reduce emissions. Using electricity as a power source for transportation improves public health and the environment, and provides safety benefits, and contributes to a resilient transportation system.
The transportation sector is the largest source of greenhouse gas emissions in the United States. A successful transition to clean transportation will require various vehicle and fuel solutions and must consider life cycle emissions. Electric and hybrid vehicles can have significant emissions benefits over conventional vehicles. All-electric vehicles produce zero tailpipe emissions, and plug-in hybrid electric vehicles (PHEVs) produce no tailpipe emissions when operating in all-electric mode. Hybrid electric vehicle (HEV) emissions benefits vary by vehicle model and type of hybrid power system.
The life cycle emissions of an electric vehicle depend on the source of the electricity used to charge it, which varies by region. In geographic areas that use relatively low-polluting energy sources for electricity production, electric vehicles typically have a life cycle emissions advantage over similar conventional vehicles running on gasoline or diesel. In regions that depend heavily on conventional electricity generation, electric vehicles may not demonstrate a strong life cycle emissions benefit. Use the Electricity Sources and Emissions Tool to compare life cycle emissions of individual vehicle models in a given location.
The advanced batteries in electric vehicles are designed for extended life but will wear out eventually. Several manufacturers of electric vehicles are offering 8-year/100,000-mile battery warranties.'Predictive modeling'by the National Renewable Energy Laboratory indicates that today's batteries may last 12 to 15 years in moderate climates (8 to 12 years in extreme climates). In addition to climate, other factors impacting battery life include driving and charging patterns, battery cell chemistry and design, and the vehicle-battery-environment thermal system.
Check with your dealer for model-specific information about battery life and warranties. Although manufacturers have not published pricing for replacement batteries, some are offering extended warranty programs with monthly fees. If the batteries need to be replaced outside the warranty, it may be a significant expense. Battery prices are expected to continue declining as battery technologies improve and production volumes increase.
Although energy costs for EVs are generally lower than for similar conventional vehicles, purchase prices can be significantly higher. Prices are likely to equalize with conventional vehicles, as production volumes increase and battery technologies continue to mature. Also, initial costs can be offset by fuel cost savings, federal tax credits, and state and utility incentives. The federal Clean Vehicle Tax Credits are available are available to consumers, fleets, businesses, and tax-exempt entities investing in new, used, and commercial clean vehicles'including all-electric vehicles, PHEVs, fuel cell EVs'and EV charging infrastructure. Some states and electric utilities also offer incentives, many of which can be found in the Laws and Incentives database. For more information on available incentives, connect with your local Clean Cities and Communities coalition.
Use the Vehicle Cost Calculator to compare lifetime ownership costs of individual models of electric vehicles and conventional vehicles.
Electric vehicles can reduce fuel costs dramatically because of the high efficiency of electric-drive components. Because all-electric vehicles and PHEVs rely in whole or part on electric power, their fuel economy is measured differently than that of conventional vehicles. Miles per gallon of gasoline equivalent (MPGe) and kilowatt-hours (kWh) per 100 miles are common metrics. Depending on how they are driven, today's light-duty all-electric vehicles (or PHEVs in electric mode) can exceed 130 MPGe and can drive 100 miles consuming only 25'40 kWh.
HEVs typically achieve better fuel economy and have lower fuel costs than similar conventional vehicles. For example, FuelEconomy.gov lists the Toyota Corolla Hybrid at an EPA combined city-and-highway fuel economy estimate of 50 miles per gallon (MPG), while the estimate for the conventional Corolla (four cylinder, automatic) is 35 MPG. Use the Find A Car tool on FuelEconomy.gov to compare fuel economy ratings of individual hybrid and conventional models.
The fuel economy of medium- and heavy-duty all-electric vehicles and PHEVs is highly dependent on the load carried and the duty cycle, but in the right applications, all-electric vehicles maintain a strong fuel-to-cost advantage over their conventional counterparts.
All-electric vehicles and PHEVs have the benefit of flexible charging because the electric grid is near most locations where people park. To safely deliver energy from the electric grid to a vehicle's battery, an EV charging station, sometimes referred to as electric vehicle supply equipment (EVSE), is needed. Drivers can charge overnight at a residence, including multifamily housing, as well as the workplace or a public charging station when available. PHEVs have added flexibility because they can also refuel with gasoline or diesel (or possibly other fuels in the future) when necessary.
Public charging stations are not as ubiquitous as gas stations. Charging equipment manufacturers, automakers, utilities, Clean Cities and Communities coalitions, states, municipalities, and government agencies are rapidly establishing a national network of public charging stations. The number of publicly accessible charging stations in the United States reached more than 60,000 in , offering more than 162,000 charging ports, according to the Alternative Fueling Station Locator. Search for electric charging stations near you.
The transportation sector accounts for approximately 30% of total U.S. energy needs and 70% of U.S. petroleum consumption. Using more energy efficient vehicles like hybrid and electric vehicles supports the U.S. economy and helps diversify the U.S. transportation fleet. The multiple fuel sources used to generate electricity results in a more secure energy source for the electrified portion of the transportation sector. All of this strengthens national energy security by increasing resilience to natural disasters and fuel supply disruptions.
HEVs typically use less fuel than similar conventional vehicles because they employ electric-drive technologies to boost vehicle efficiency through regenerative braking'recapturing energy otherwise lost during braking. PHEVs and all-electric vehicles, also referred to as battery electric vehicles (BEVs), are both capable of being powered solely by electricity, which is produced in the United States from natural gas, coal, nuclear energy, wind energy, hydropower, and solar energy.
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