A HEV (Hybrid Electric Vehicle) has a small battery and an engine; it cannot be plugged in. An MHEV (Mild Hybrid Electric Vehicle) has an even smaller battery-and-motor system that assists the engine, but cannot drive the wheels on its own. A PHEV (Plug-in Hybrid Electric Vehicle) has a larger battery and can be plugged in for meaningful electric-only range. A BEV (Battery Electric Vehicle) is 100% electric with no engine.

^{By David Lewis, Electric Vehicle & Clean Energy Journalist.}

A Hybrid Electric Vehicle (HEV) combines a small battery and electric motor with a conventional petrol or diesel engine. Unlike a plug-in hybrid (PHEV) or a battery electric vehicle (BEV), a HEV cannot be plugged in. Instead, its battery is charged automatically by the engine and through regenerative braking. HEVs are also widely known as ‘self-charging hybrids’.

Could a Hybrid Electric Vehicle Be Your Next Lease Car?

HEVs offer a familiar driving experience with modest fuel savings and no need to plug in. Read our complete guide, full of clear definitions, detailed analysis, essential tips and advice:

What is a Hybrid Electric Vehicle (HEV)?

The term HEV is short for Hybrid Electric Vehicle. You may also see HEVs referred to as ‘hybrids’, ‘conventional hybrids’, ‘full hybrids’, or ‘self-charging hybrids’. All of these terms describe the same thing: a vehicle that has both a small battery with an electric motor and a petrol or diesel engine, but which cannot be plugged in to charge.

It’s worth noting that a HEV is a specific type of electric vehicle (EV). The broader term ‘EV’ also covers Battery Electric Vehicles (BEVs), which run entirely on electricity, and Plug-in Hybrid Electric Vehicles (PHEVs), which have a larger battery and a charging socket. A HEV sits at the less electrified end of the spectrum: it uses a battery and electric motor to assist the engine, but it relies primarily on petrol or diesel for propulsion.

HEVs remain a popular choice for UK drivers who want to improve their fuel economy without changing their refuelling habits. Because there is no need to plug in, the transition from a conventional petrol or diesel car to a HEV is virtually seamless. You simply fill up with fuel as normal. A wide range of HEV models is available to lease or buy from manufacturers such as Toyota, Lexus, Honda, Hyundai, Kia, Nissan, and Renault.

HEV vs BEV vs PHEV – What’s the Difference?

If you’re considering buying or leasing a vehicle and find all the EV car terminology confusing, here’s a quick summary of how HEVs differ from BEVs and PHEVs:

HEV (Hybrid Electric Vehicle / Self-Charging Hybrid): Has a small battery and a petrol/diesel engine. Cannot be plugged in. Battery is charged by the engine and regenerative braking. Very limited electric-only driving – typically up to 1-2 miles at low speeds.
PHEV (Plug-in Hybrid Electric Vehicle): Has a medium-sized battery and a petrol/diesel engine. Can be plugged in to charge. Typical electric-only range of 25-90 miles (varies by model).
BEV (Battery Electric Vehicle): 100% electric, large battery, no engine. Zero tailpipe emissions. Charged by plugging in. Typical range of 150-400+ miles.

If you are ready to go fully electric and benefit from the lowest running costs and zero tailpipe emissions, a BEV is the best choice. Read our Battery Electric Vehicles guide for more details.

If you want the option of electric-only driving for shorter journeys, but still want the reassurance of a petrol or diesel engine for longer trips, a PHEV offers a practical middle ground. Read our Plug-in Hybrid Electric Vehicles guide for more information.

If you simply want improved fuel economy without any changes to how you refuel or drive, a HEV is the most straightforward option, and this guide will tell you everything you need to know.

How Does a Hybrid Electric Vehicle Work?

A hybrid electric vehicle – or HEV – uses two power sources working together: a small battery pack paired with an electric motor, and a conventional petrol or diesel internal combustion engine. The vehicle’s onboard computer continuously decides which power source to use – or whether to combine both – depending on your speed, acceleration, and the battery’s charge level.

At low speeds, for example pulling away from traffic lights, crawling in a traffic jam, or manoeuvring in a car park, the electric motor can power the wheels on its own for short distances. This means zero tailpipe emissions during those moments. Think of the iconic Toyota Prius taxi gliding silently through city traffic.

Once you accelerate or reach higher speeds (typically above 15-20 mph), the petrol or diesel engine kicks in and takes over as the primary power source. The electric motor may continue to assist the engine during hard acceleration, climbing hills, or overtaking, providing a combined power boost.

The small battery is charged in two ways. First, via regenerative braking: when you lift off the accelerator or apply the brakes, the electric motor acts like a generator, converting kinetic energy back into electricity and feeding it into the battery. Second, the internal combustion engine can also charge the battery directly while driving.

Crucially, a HEV has no charging socket. This is the key distinction between a HEV and a PHEV. You never need to plug a HEV in – the battery charges itself automatically as you drive. This makes the transition from a conventional petrol or diesel car effortless.

Charging a HEV – What You Need to Know

There’s a lot of confusion about HEV charging, mainly because of the way they are often marketed as ‘self-charging hybrids’. Let’s clarify how it works.

Pure electric cars (BEVs) and plug-in hybrids (PHEVs) can be charged by plugging into a charging point at home, work, or in public. A HEV, by contrast, has no charging socket and cannot be plugged in.

So how does a HEV charge its small battery? It manages it in two ways:

Regenerative braking: when you slow down or brake, the electric motor acts as a generator, converting kinetic energy into electricity that is then stored in the battery. All types of electric vehicle use this technique, but it is the primary charging method for a HEV.
Engine-driven charging: the petrol or diesel engine can also charge the battery directly while driving. In effect, the engine powers a generator which tops up the battery.

In practice, this means you never have to think about charging a HEV. The battery manages itself entirely behind the scenes. You simply fill up with petrol or diesel at a forecourt and drive as normal.

This is a significant advantage for drivers who do not have access to off-street parking, a home charging point, or reliable public charging infrastructure. However, it also means you cannot benefit from cheap off-peak electricity to reduce your fuel costs – a benefit that BEV and PHEV drivers can take advantage of.

How Far Can a HEV Go? Range Explained

Because a HEV runs primarily on petrol or diesel, its overall range is essentially the same as a conventional car. You fill up at a petrol station as normal, and a typical HEV will often cover 500 miles or more, depending on tank size and efficiency.

The electric-only range, however, is very limited. Most HEVs can only travel on battery power alone for about 1-2 miles, and only at low speeds (typically below 15-20 mph). This is because HEV batteries are small – usually around 1-2 kWh – compared to a PHEV’s 10-30 kWh battery or a BEV’s 40-90+ kWh battery.

The upshot? Range anxiety is non-existent with a HEV. You refuel at a petrol station, just as you would with any conventional car, and carry on driving. There is no need to plan charging stops or worry about finding a charging point.

Here are the official WLTP combined fuel economy figures for some popular HEVs available to lease in the UK:

MAKE & MODEL	TRIM & VARIANT	WLTP COMBINED MPG
Toyota Aygo X	1.5 Hybrid Icon 5dr CVT [2026]	Up to 74.3 mpg
Lexus LBX	1.5 Urban 5dr E-CVT [2026]	Up to 62.7 mpg
Renault Austral	E-Tech Full Hybrid Techno 5dr Auto [2026]	Up to 58.9 mpg
Hyundai Tucson	1.6 TGDi Hybrid N Line 5dr 2WD Auto [2025]	Up to 48.7 mpg

Running Costs and Savings

HEVs can offer moderate fuel savings compared to an equivalent non-hybrid petrol or diesel car. The electric motor assists the engine during acceleration and at low speeds, reducing overall fuel consumption. In stop-start urban driving, these savings are most noticeable.

However, it is important to set realistic expectations. Because you cannot plug a HEV in, all of its energy ultimately comes from burning petrol or diesel. The savings are therefore much smaller than those available from a BEV (which can be charged on cheap off-peak electricity) or even a PHEV (which can complete many short trips on electricity alone).

Here is a rough comparison of annual fuel costs for a driver covering 8,000 miles per year:

VEHICLE TYPE	TYPICAL ANNUAL FUEL COST*	APPROXIMATE SAVING vs PETROL*
Petrol car	£1,275	–
HEV	£925	27%
PHEV	£640	50%
BEV	£190	85%

* Figures are indicative and based on: BEV efficiency of 4 miles per kWh; home off-peak charging tariff of 9.5p per kWh; PHEV petrol engine efficiency of 40 mpg and electric efficiency of 2.9 miles per kWh, with 5,000 electric miles and 3,000 petrol miles; cost of petrol is £1.40 a litre; HEV efficiency of 55 mpg; petrol car efficiency of 40 mpg. Actual costs depend on the vehicle make and model, driving style, fuel prices, and your electricity tariff.

Tax Implications for HEV Drivers in the UK

Unlike BEVs and PHEVs, HEVs do not enjoy significant tax advantages. Because HEVs still run primarily on petrol or diesel and typically emit 90-130+ g/km of CO₂, they are taxed in a broadly similar way to conventional internal combustion engine vehicles.

Vehicle Excise Duty (VED / Road Tax)

Cars, including HEVs, registered from 1 April 2017 onwards pay the standard annual VED rate (year 2 onwards). This standard rate increases to £200 from 1 April 2026.

If the vehicle’s list price exceeds £40,000, you will also pay the Expensive Car Supplement of £440 (from 1 April 2026) per year for five years, on top of the standard rate.

First-year VED rates for new cars vary by CO₂ emissions.

Benefit-in-Kind (BiK) Company Car Tax

For the 2025/26 tax year, the BiK percentage for petrol and hybrid-powered company cars is primarily based on the car’s WLTP CO₂ emissions (and, for ultra-low emission cars, its electric-only range).

A typical HEV emitting around 120 g/km CO₂ would attract a BiK rate of 30%. By comparison, a BEV is taxed at 3% in 2025/26 (rising to 4% in 2026/27), and many PHEVs fall between 6% and the high teens depending on CO₂ and electric range.

In short, if company car tax is a major consideration, a BEV or PHEV will deliver far greater savings than an HEV.

Government Grants

HEVs do not qualify for the UK government’s Electric Car Grant, which is reserved for zero-emission battery electric vehicles. There are no current government purchase incentives specifically for HEVs.

Want to start a conversation about hybrid electric vehicles?

Why not phone us on 0118 3048 688 or email at enquiries@selectcarleasing.co.uk

Environmental Impact of HEVs

HEVs occupy a middle ground on the environmental spectrum. They are better than a pure petrol or diesel car, because the electric motor reduces fuel consumption (and therefore CO₂ emissions), particularly in urban stop-start driving. However, they are significantly less green than BEVs or PHEVs.

Here is a simple comparison:

BEVs are the gold standard – they are all-electric and produce zero tailpipe emissions.
PHEVs earn the silver medal – they can drive the first 25-90 miles on battery power alone (zero emissions), but emit pollutants once the engine takes over.
HEVs take the bronze – they still burn petrol or diesel for the vast majority of their driving, and so emit CO₂, NOx, and particulate matter. Their saving grace is that around town, at low speeds, they can run on battery power alone for short distances.

It is also worth considering the wider environmental picture. If you are concerned about air quality in your local area – particularly in cities with Clean Air Zones – a HEV will still emit pollutants. BEVs, and to a lesser extent PHEVs running in electric mode, produce zero tailpipe emissions.

Managing Your Fuel and Driving Down Costs

Unlike plug-in electric vehicles, driving a HEV doesn’t require any research into electricity tariffs or charging point locations. You simply fill up with petrol or diesel and go. However, there are still a number of ways to maximise your fuel efficiency in a HEV:

Drive smoothly: gentle acceleration and gradual braking maximise the amount of energy recovered through regenerative braking, keeping the battery topped up and reducing the load on the engine.
Anticipate the road: look ahead and ease off the accelerator early when approaching traffic lights, roundabouts, or slower traffic. Coasting allows the electric motor to recoup energy.
Use EV mode when available: some HEVs let you select an ‘EV mode’ for short, low-speed trips, for example, in a car park or residential area. This saves fuel and reduces emissions in those moments.
Maintain correct tyre pressures: under-inflated tyres increase rolling resistance and reduce fuel economy. Check your tyre pressure regularly.
Remove unnecessary weight: extra weight means the engine and electric motor have to work harder. Clear out heavy items you don’t need.
Compare fuel prices: use apps and websites to find the cheapest petrol or diesel near you.

Advantages and Disadvantages of HEVs

Every vehicle type has its strengths and trade-offs, and hybrids are designed to suit particular driving patterns. Below is a clear, balanced summary of the main advantages, together with the key points to think about before deciding whether a HEV fits your needs.

ADVANTAGES

No plugging in required: the battery charges itself through regenerative braking and the engine. Ideal if you don’t have off-street parking or access to a charging point.
Improved fuel economy: HEVs typically achieve 10-25% better fuel economy than an equivalent non-hybrid petrol or diesel model.
No range anxiety: you fill up at a petrol station as normal. Range is the same as any conventional car.
Familiar driving experience: HEVs drive like any automatic car. There is virtually no learning curve.
Quieter at low speeds: in town, the electric motor can power the car silently for short distances.
Wide choice of models: HEVs are available from many popular manufacturers, spanning hatchbacks, saloons, SUVs, and more.
Lower maintenance than pure ICE: regenerative braking reduces wear on brake pads and discs, potentially lowering servicing costs.

DISADVANTAGES – THINGS TO BEAR IN MIND

Still burns petrol or diesel: HEVs produce tailpipe emissions. They are not zero-emission vehicles.
Limited fuel savings: savings are modest compared to BEVs and PHEVs, particularly for motorway driving.
No government incentives: HEVs do not qualify for EV purchase grants, low BiK rates, or other tax advantages reserved for plug-in vehicles.
Minimal electric-only driving: the battery is small and can only power the car for about 1-2 miles at very low speeds.
Not exempt from Clean Air Zone charges: unlike BEVs in many areas, HEVs may still be subject to charges in certain low-emission or Clean Air Zones, depending on their emissions standard.
Higher CO₂ than plug-in alternatives: for environmentally conscious drivers, a BEV or PHEV is a greener choice.

Is a HEV Right for You?

A HEV could be an excellent choice if:

You don’t have access to off-street parking or a home charging point.
You want slightly better fuel economy than a conventional petrol or diesel car, with zero effort.
You do a lot of urban or stop-start driving, where the hybrid system is most effective.
You’re not ready to commit to plugging in or planning charging stops.
You want a familiar, hassle-free driving and refuelling experience.

On the other hand, if you can charge at home or work, a BEV or PHEV will likely deliver much greater fuel savings and a lower environmental footprint. And if company car tax is a priority, the dramatically lower BiK rates on BEVs (3% in 2025/26, rising to 4% from April 2026) make them far more tax-efficient than a HEV.

Still unsure? Read our How to Choose an Electric Car guide, which walks you through all the key considerations.

Why Lease a HEV?

Leasing is one of the most popular ways to get behind the wheel of a new hybrid. Here’s why:

Lower monthly costs: leasing typically requires a lower upfront payment than buying, and your fixed monthly payments make budgeting simple.
Drive the latest models: with a 2-4 year lease, you always have access to the newest technology, the best fuel economy, and the latest safety features.
No depreciation worries: at the end of your lease, you simply hand the car back. You don’t have to worry about the vehicle’s resale value.
Manufacturer warranty cover: most new cars come with a 3-7 year manufacturer warranty, meaning you are likely covered for the entire lease term.
Try before you commit: if you’re thinking about eventually going fully electric, leasing a HEV is a low-risk way to experience hybrid technology before making a bigger step to a PHEV or BEV on your next lease.

Browse our latest hybrid and electric lease deals to find the right car for your needs.

Frequently Asked Questions

HEV stands for Hybrid Electric Vehicle. It describes a car that has both a petrol or diesel engine and a small battery with an electric motor. A HEV cannot be plugged in to charge.

Yes. ‘Self-charging hybrid’ is a marketing term used by some manufacturers to describe a HEV. The name refers to the fact that the battery charges itself through regenerative braking and the engine – you never need to plug it in.

No. A HEV has no charging socket and cannot be plugged in. The battery charges automatically as you drive. You fill up with petrol or diesel at a fuel station, just like any conventional car.

HEVs typically achieve 10-25% better fuel economy than an equivalent non-hybrid car, depending on driving conditions. Savings are greatest in urban, stop-start driving and smallest on the motorway.

No. UK government grants, such as the Electric Car Grant, are reserved for zero-emission battery electric vehicles. HEVs do not qualify.

A HEV (Hybrid Electric Vehicle) has a small battery and an engine; it cannot be plugged in. An MHEV (Mild Hybrid Electric Vehicle) has an even smaller battery-and-motor system that assists the engine, but cannot drive the wheels on its own. A PHEV (Plug-in Hybrid Electric Vehicle) has a larger battery and can be plugged in for meaningful electric-only range. A BEV (Battery Electric Vehicle) is 100% electric with no engine.

Yes, but only for very short distances at low speeds, typically 1-2 miles below about 15-20 mph. The electric motor takes over in situations like creeping in traffic, pulling away from a standstill, or manoeuvring in a car park.

Most new HEVs meet the ULEZ emissions standard (Petrol: Euro 4, Diesel: Euro 6 (TfL ULEZ minimum standards)) and are therefore exempt from the daily charge. However, older HEVs may not meet these standards. Always check the Transport for London ULEZ vehicle checker before driving in the zone.

Popular HEVs available to lease in 2026 include the Kia Sportage, Toyota Aygo X, Lexus LBX, Hyundai Santa Fe, Mazda 2 Hybrid, MG ZS, Renault Austral, Toyota Corolla, Nissan X-Trail, and the Dacia Bigster. Browse our full range of hybrid lease deals.

Where to Next?

Now you know the pros and cons of 'non plug-in' Hybrid Electric Vehicles, take a look at more of our handy EV Guides and the latest Electric & Hybrid lease deals below:

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