Your Ultimate Guide to Electric Vehicles


Welcome, Westborough residents, to your definitive journey into the electrifying world of electric vehicles (EVs)! We’re here to celebrate your interest in joining the eco-conscious EV community. Your decision to consider an EV is a powerful step toward sustainability, both for you and our beautiful town.

Electric vehicles are at the forefront of reducing greenhouse gas emissions and combating climate change. They are champions in cutting down emissions not just while driving but throughout their entire life cycle. By choosing an EV, you'll be key in enhancing both local air quality and public health. Our guide is designed to provide you with the essential knowledge required to transition smoothly to an electric vehicle. Whether you're an EV enthusiast or just beginning your research, let's embark on this enlightening path together!  The graph below shows the carbon pollution (i.e. greenhouse gases GHG) generated by a 2024 Toyota Corolla Cross gas vehicle versus a comparable Tesla Model Y EV using Argonne National Laboratory’s AFLEET tool. 

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What is an EV? BEV? PHEV?

Electric vehicles, or EVs, ditch gasoline for electricity, leading to a cleaner, greener drive. There are primarily two sorts:

Plug-in Hybrid Electric Vehicles (PHEV):  A Plug-in Hybrid Electric Vehicle (PHEV), is a mix of the BEV and a conventional internal combustion engine (ICE) vehicle; hence the hybrid in the name. It has a combustion engine powered by gasoline and a rechargeable battery.  The battery powers the motors of the vehicle for as long as it is charged, but once depleted, it switches to gasoline for power. 

The PHEV serves many individuals who are just taking baby steps in transitioning to electric vehicles but don’t want to entirely leave their gasoline experience behind just yet. Still, a PHEV can only do about 20 to 50 miles on a battery charge (depending on battery size) before switching to the gasoline engine.  It can be a good option for those driving short distances daily who can then recharge the battery each night.  The gas engine is still available for long trips.  But the environmental benefits are only realized when using the battery.


Auxiliary Battery

  • In electric drive vehicles, the auxiliary battery serves a critical function by providing the electrical power necessary to start the car and operate vehicle accessories. This ensures that essential functions, such as lights and infotainment systems, remain operational, even before the main power system is engaged.

Charge Port

  • The charge port is an essential interface that allows the vehicle to connect to an external power supply for charging the traction battery pack. It's designed for ease of use, enabling drivers to efficiently recharge their vehicle's battery, thus ensuring the vehicle is ready for use with sufficient electric range.

DC/DC Converter

  • The DC/DC converter plays a pivotal role in the vehicle's electrical system by converting the higher-voltage DC power from the traction battery into lower-voltage DC power suitable for vehicle accessories and to maintain the charge of the auxiliary battery. This ensures that all electronic components operate safely and effectively.

Electric Generator

  • The electric generator captures kinetic energy during braking and converts it into electrical energy, a process known as regenerative braking. This energy is then fed back into the traction battery pack, enhancing the vehicle’s efficiency and range. Some vehicles are equipped with motor generators that serve dual purposes, both for driving and energy regeneration.

Electric Traction Motor

  • The electric traction motor is responsible for driving the vehicle's wheels, using electrical power from the traction battery pack. It's a key component in delivering the vehicle's performance, offering smooth and immediate torque delivery. In some vehicles, the motor generator unit also supports regenerative braking functions.

Exhaust System

  • The exhaust system is designed to safely channel exhaust gases from the internal combustion engine to the outside, minimizing environmental impact. Equipped with a three-way catalyst, it significantly reduces harmful emissions, ensuring the vehicle meets stringent environmental standards.

Fuel Filler & Fuel Tank

  • The fuel filler is the access point for refueling the vehicle, designed to securely connect to a fuel dispenser. The fuel tank stores the gasoline, providing a reliable supply of fuel to the internal combustion engine when electric power alone is insufficient, ensuring extended range and flexibility in vehicle operation.

Internal Combustion Engine

  • The internal combustion engine in a plug-in hybrid operates by combusting fuel with air, ignited by a spark plug. This traditional power source provides additional propulsion and range, particularly useful during longer trips or when the traction battery's charge is low.

Onboard Charger

  • The onboard charger converts alternating current (AC) from the charge port into direct current (DC) to recharge the traction battery. It carefully monitors the battery's state of charge and voltage, ensuring optimal charging performance and battery health.

Power Electronics Controller

  • This controller is the brain behind the vehicle's power management, directing the flow of electrical energy from the traction battery to the electric traction motor. It adjusts the motor's speed and torque according to the driver's demands, ensuring efficient and responsive performance.

Thermal System (Cooling)

  • The thermal system maintains the proper operating temperature for the engine, electric motor, power electronics, and other critical components. It's crucial for ensuring performance, efficiency, and longevity of the vehicle's powertrain by preventing overheating and optimizing conditions for energy conversion.

Traction Battery Pack

  • The traction battery pack stores electrical energy for the electric traction motor. It's a high-capacity battery system designed for long life and high performance, enabling the vehicle to travel significant distances on electric power alone.


  • The transmission in a plug-in hybrid electric vehicle transfers mechanical power from the engine and/or electric traction motor to the wheels. It plays a crucial role in ensuring that the vehicle can efficiently adapt its power output to varying driving conditions, optimizing performance and fuel efficiency.

Battery Electric Vehicles (BEV): Purely electric, BEVs are powered solely by their rechargeable batteries and electric motors, boasting ranges over 250 miles on a full charge, with some models offering extended options in excess of 400 miles.  While a conventional vehicle refills its gas tank to ensure longer mileage during commutes or long-distance travels, a BEV simply needs to recharge its batteries for the same purpose. But the most important distinguishing feature of a BEV is that, unlike the gasoline engine that has a complex arrangement of gears, pulleys, pistons, valves, fuel injectors, and exhaust system components making up the engine, a BEV has none. Moreover, the conventional vehicle calculates its mileage potential based on its engine size, combustion rate, and fuel tank size. A BEV primarily considers its battery size for the same reasons.

The lack of a combustion engine in a BEV automatically eliminates an exhaust system, as there are no fumes or carbon emissions to consider during its design. And in fact, the absence of carbon emissions from BEVs is one remarkable advantage over conventional vehicles and why many individuals and governments are beginning to look in its direction. It promotes a cleaner and healthier environment and ensures a better-protected atmosphere free from planet-warming green house gasses. It is still true that the electricity that you use to charge your BEV needs to be generated from something, which may be coal, oil, natural gas, nuclear, wind or solar power.   In Massachusetts most electricity (76%) is generated from natural gas which burns far cleaner than gasoline; 22% comes from clean wind and solar.  Coal and nuclear are not used in Massachusetts.


Auxiliary Battery (All-Electric)

  • The auxiliary battery in all-electric vehicles plays a crucial role by powering vehicle accessories such as the lights, infotainment system, and climate control, separate from the main traction battery. This ensures that the essential functions are maintained without compromising the vehicle's driving range. The auxiliary battery operates at a lower voltage and is critical for the reliability and functionality of the vehicle's electrical systems.

Charging Interface

  • The charging interface is the electric vehicle's gateway to recharging its main traction battery. It allows the vehicle to connect to various external power sources, including standard home outlets and high-power charging stations. This feature is designed for flexibility, accommodating different charging levels and speeds to ensure that the vehicle can be efficiently charged anywhere, from a slow overnight charge to a rapid top-up at public charging stations.

DC/DC Converter

  • In electric vehicles, the DC/DC converter is essential for managing power distribution. It converts the high-voltage DC power from the traction battery into a lower voltage suitable for powering the vehicle's auxiliary systems and charging the auxiliary battery. This component ensures that the vehicle's electronic accessories operate efficiently and reliably, by providing them with the appropriate power level.

Electric Drive Motor

  • The electric drive motor is the heart of an all-electric vehicle's propulsion system. Powered by the traction battery, it converts electrical energy into mechanical energy to drive the vehicle's wheels. Some electric vehicles feature motor generators that serve dual purposes, providing propulsion and capturing energy through regenerative braking, enhancing the vehicle's efficiency and range.

Integrated Charger

  • The integrated charger is responsible for converting alternating current (AC) from the charging interface into direct current (DC) to recharge the traction battery. It closely monitors key battery parameters during charging, such as voltage, current, and temperature, to optimize the charging process and ensure the longevity and health of the traction battery. This component is pivotal in maintaining the vehicle's performance and range.

Electric Power Controller

  • The electric power controller meticulously manages the flow of electricity from the traction battery to the electric drive motor. By adjusting the speed and torque of the motor, it optimizes the vehicle's performance, efficiency, and responsiveness to driver inputs. This system is integral to the smooth operation and driving experience of the electric vehicle.

Cooling System

  • The cooling system in an all-electric vehicle is engineered to maintain optimal operating temperatures for the electric motor, power electronics, and other key components. By preventing overheating, it ensures that the vehicle operates efficiently, preserving the integrity and performance of crucial systems and extending their lifespan.

Traction Battery

  • The traction battery is the electric vehicle's main energy storage unit, designed to provide a substantial electric range on a single charge. It powers the electric drive motor and is a critical component in determining the vehicle's performance, range, and overall efficiency. Modern EVs feature advanced lithium-ion or solid-state batteries that offer high energy density and longevity.

Electric Transmission

  • Unlike traditional transmissions found in combustion engine vehicles, the electric transmission in EVs has a simpler design, often consisting of a single-speed gearbox. It efficiently transfers mechanical power from the electric drive motor to the vehicle's wheels, facilitating smooth and instant acceleration. This component is key to converting the electric motor's high torque into practical and usable power for driving.

Understanding Electric Vehicles

EVs trade the traditional gas-powered engines for potent electric motors powered by sizeable onboard batteries. Here's how EVs redefine driving:

Power Source:  Swap the gas station for a charging station. When an EV's battery runs low, you simply plug it in to recharge.

  1. Emissions: EVs produce no tailpipe emissions, making a significant dent in your carbon footprint, especially when charged with renewable energy.
  2. Torque: Electric motors deliver instant torque, which translates into snappy acceleration; some EVs can zoom from 0 to 60 mph in a thrilling 6 seconds or less.
  3. Efficiency: EVs boast over 77% efficiency in converting electrical energy to power, leaving gas engines trailing at just 20%.
  4. Quiet Operation: EVs are serene, offering a hushed ride that sometimes includes pedestrian warning sounds for safety.

Dispelling common EV myths is key:

  1. Limited Range: While early EVs might have struggled with range, modern ones comfortably travel 200+ miles on a single charge, making daily commutes and errands a breeze.  There are some BEVs available with 400 mile ranges.
  2. Long Recharge Times: With a Level 2 charger, you can recharge most EVs overnight (about 8 hours). Need a quick boost? DC fast chargers (DCFCs) can significantly power up your EV in as little as 30 minutes.
  3. Higher Costs: EVs do have a higher initial price tag, but the total cost of ownership often evens out or even becomes cheaper thanks to lower running and maintenance costs, lower costs to charge vs. gasoline and the federal and state incentives available.  There are several low-cost EVs whose purchase price is comparable to a gasoline ICE, particularly after the government rebates.

Benefits of Electric Vehicles

Choosing an EV comes with a myriad of benefits:

  1. Environmental Impact: EVs offer a cleaner, zero-direct-emissions drive, contributing to better air quality and lessened greenhouse gas emissions.  
  2. Cost Savings: Despite the higher upfront cost, EVs can be light on the wallet over time due to lower fueling and maintenance expenses.
  3. Reduced Maintenance: EVs cut down on maintenance needs with simplified drive trains, fewer fluids, and less wear on components like brake pads, translating into cost savings and convenience.  A BEV motor has about 20 moving parts compared to 200 in an ICE drive train.


EVs redefine car care with minimal maintenance demands. Here's what to expect:

  1. Tire rotations every 6,000-8,000 miles for even wear as in any vehicle.
  2. Brake pad replacements, less frequent thanks to regenerative braking.
  3. HVAC air filter changes for a clean and fresh cabin environment.
  4. Software update diagnostics easily managed through modern tech; updates are usually automatically sent by the manufacturer over the air

In essence, EVs steer clear of the oil changes, tune-ups, and the complex upkeep associated with traditional cars.


Transitioning to an electric vehicle is an increasingly popular step, and we’re confident that this guide has lit the way for a smooth switch. Remember:

  1. EVs are a win for the environment with zero tailpipe emissions.
  2. Though the sticker price can be higher upfront, EVs promise savings on fuel and maintenance, and both federal and state incentives can sometimes lower the price below that of a comparable gas vehicle.
  3. Range anxiety is a thing of the past; most EVs are up to the task for daily driving needs.
  4. Charging options abound, ensuring convenience and planning flexibility.
  5. The thrill of driving an EV comes with instant acceleration and a quiet, smooth ride.
  6. A variety of EV models suits all budgets and lifestyles.

Thank you for considering the shift to electric vehicles, contributing to a cleaner, greener Westborough. Your commitment is vital in fostering a sustainable community, ensuring a healthier and more vibrant future for us all. Explore the Drive Green section for more insights into EVs, charging, incentives, and much more. Together, let's power forward to an electrified horizon!

Electric Vehicle Myths

The environmental impact of electric vehicles (EVs) is dynamically linked to the source of electricity used for charging. While it's true that charging EVs in regions reliant on fossil fuels generates carbon emissions, the overall carbon footprint of EVs is still lower than that of gasoline cars. This discrepancy arises because electric motors are vastly more efficient than internal combustion engines. The Union of Concerned Scientists reported that EVs are cleaner over their lifetime compared to gasoline vehicles in every part of the U.S., not just areas with clean electricity. As the grid becomes greener, with renewables accounting for an increasing share of power generation, the carbon footprint of EVs will continue to decrease. The Department of Energy's National Renewable Energy Laboratory (NREL) provides data showing a steady increase in renewable energy's share of the U.S. electricity mix, enhancing the environmental benefits of EVs.