hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Hybrid cars are not new to Malaysians, seeing that they have been available in Malaysia for roughly 15 years with the introduction of the FD-generation Honda Civic Hybrid.

And today, hybrids are even more popular, as manufacturers like Honda, Toyota, and Nissan all offer at least one hybrid model in their line-up here in Malaysia. More recently, Perodua has thrown their hat in the ring with the 2022 Perodua Ativa Hybrid.

On one of the presentation slides that Perodua showed, the second national carmaker stated that the Ativa Hybrid is a series hybrid model, different from parallel and series-parallel hybrids.

But what separates a series hybrid from a parallel hybrid and a series-parallel hybrid? Let’s dive deeper by taking a look at popular hybrid technologies.

Mild-hybrid (MHEV)

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

First and foremost is mild-hybrid (MHEV). Although mild-hybrids feature an electric motor, its electric motor only functions to assist the engine and cannot accelerate from standstill on electric power alone.

Compared to other hybrid solutions, mild-hybrids are the cheapest to manufacture due to their simplicity and smaller battery capacity, but the trade-off is lower performance and improvements in fuel efficiency isn’t that great.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

​​Notable cars with a mild-hybrid system include Honda’s range of models with the Integrated Motor Assist (IMA) system (CRZ, Insight, Civic).

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

What about the Nissan Serena S-Hybrid then? That’s not a real hybrid, not even a mild-hybrid, as there is no motor to assist / drive the wheels, only an upgraded engine starter motor and a secondary 12V battery for better engine start-stop performance.

Full-hybrid (HEV)

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Full-hybrid vehicles are more advanced than mild-hybrid vehicles. Full-hybrids can accelerate from standstill in electric power alone and offer higher performance than mild-hybrids. However, due to their complex hybrid system and larger battery capacity (typically around the 1 kWh mark, larger than MHEV), it’s more expensive to manufacture a full-hybrid vehicle.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

The not-sold-in-Malaysia, 4th gen Toyota Prius is available as a regular HEV or PHEV

That said, when it comes to vehicle weight, PHEVs are generally heavier than their HEV counterparts, owing to their larger battery capacity. For example, the Toyota Prius PHV is roughly 200 kg heavier than the regular Toyota Prius.

But that’s not all – full-hybrid vehicles are split into three distinctive types: Series hybrid, parallel hybrid, and series-parallel hybrid.

Series hybrid

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Think of series hybrids as EVs with its own power generator under the hood. Series hybrids typically feature a petrol engine, but unlike other hybrid systems out there, the petrol engine’s sole duty is to charge the battery.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Cars with a series hybrid system include the Perodua Ativa Hybrid and Nissan’s e-Power range of models (Serena, X-Trail, Note).

Parallel hybrid

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

In a parallel hybrid system, there are two paths of power turning the wheels, hence the term parallel. Both the engine and electric motor can drive the car individually, or simultaneously.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

The Jazz Hybrid featured an i-DCD hybrid powertrain

Examples of cars with a parallel hybrid system include Honda’s i-DCD range (City, Jazz, HR-V), as well as all German marques like BMW. BMW’s range of PHEVs are functionally parallel hybrids, as such the aforementioned BMW models belong in this category.

Series-parallel hybrid

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

A series-parallel hybrid is the most advanced (and also most expensive) of non-plugged in electrified vehicles. It combines the benefits of a series and parallel hybrid system into one.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you
hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

In a series-parallel hybrid, there are 2 electric motors. Cheaper series / parallel hybrids have only 1 motor. With only one motor, the system can either drive the car, or recharge the batteries, but not at the same time. With two motors, it can, thus allowing it to operate either as a series hybrid or a parallel hybrid.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Honda’s e:HEV (or i-MMD) will run in series mode (electric motor or engine driving the wheels) longer than Toyota.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Honda Insight shown, different model but uses a similar i-MMD setup

The most well-known example of a series-parallel hybrid is the Toyota Hybrid System, fitted to models like the Toyota Corolla Cross Hybrid. Honda’s e:HEV also functions similarly, and is applied to models like the Honda City RS, Honda City Hatchback RS, and Honda HR-V RS.

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

With the exception of a series hybrid (ETCM does not sell any e-Power cars here and the Ativa Hybrid is only for leasing), practically every other hybrid system can be found in cars sold here in Malaysia.

What about plug-in hybrids (PHEVs) then?

Plug-in hybrid (PHEV)

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

Mercedes-Benz’s illustration of a plug-in hybrid A-Class

Almost all PHEVs are parallel hybrids, with a motor nestled inside a modified automatic transmission.

A plug-in hybrid (PHEV) is a hybrid vehicle that features a charging socket that can be used to charge the battery pack. Seeing that plug-in hybrids’ battery capacity (typically around or more than the 20 kWh mark) is second only to a full battery electric vehicle (BEV), PHEVs can travel purely on electric power alone, with a range of up to 100 km (model dependent).

hybrid 101: demystifying mhev, hev, phev, and understanding whether toyota, honda, or perodua hybrids are best for you

BMW 330e pictured

PHEVs are very expensive, due to the larger battery so it is typically represented by premium cars. Models include the BMW 330e, BMW 530e, BMW 740Le, BMW X3, and BMW X5. Volvo also offers PHEVs (branded as Recharge T8) in Malaysia, such as the Volvo S60, Volvo V60, Volvo XC60, and Volvo XC90.

Question is, seeing that fuel subsidies will be removed next year, will your next car purchase be a hybrid?

Keyword: Hybrid 101: Demystifying MHEV, HEV, PHEV, and understanding whether Toyota, Honda, or Perodua hybrids are best for you

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