And, in practice, the battery tends to be much, much bigger. Some PHEVs are basically mediocre-range electric cars which happen to have a petrol generator.
Something with a 60 mile electric range will likely satisfy all of their day-to-day driving. The generator means they don't have to charge though, so they can still take road trips without worrying about electric range.
In practice though, they're somewhat impractical. You still need an entire ICE drivetrain AND a moderately sized battery and electric motor, driving the price up.
This has been a perfect car for my use case, but the big caveat is my short commute. If your daily commute fits inside that short range (or one way commute if there's a charger at your workplace), this can be a great fit. A+++, highly recommended.
If your work commute is significantly longer than a PHEV's battery range, or if you don't have a convenient place to charge it, then it's a much less attractive proposition.
Most people don't end up charging their battery because it still has an ICE so why bother? So now they have the worst of both worlds. Complex ICE machinery that needs regular service and heavy battery that doesn't end up being used.
You can also have a much smaller engine for a much bigger car, since you only need to cover average not peak power usage.
You also in most designs eliminate the gearbox.
It just doesn't have much range: only about 25 miles on my 2018 model. Newer models advertise up to 44 miles on EV.
A colleague drives a BMW 3something hybrid and as far as i know has a 14kWh battery..
Thats good for about a 100km, but i very much wouldn't consider that a "fully" electric car by any means (edit: did you edit your post? couldve sworn you said "fully electric" instead of "mediocre range"?)...
Also, what most people don't realize: if you're only (or mostly) driving it electric, you're putting many more cycles onto that tiny battery.
...which usually costs as much as a "regular" EV battery, x times the size.
https://evclinic.eu/2024/09/05/bmw-hybrid-repeated-battery-f... for example...
https://carnewschina.com/2026/05/01/byd-deploys-new-heyuan-h...
In practice, most are mediocre range, low-speed only evs that effectively no one bothers to charge regularly because its impractical and annoying. The manufactures claim 80% reductions in emissions, and use those credits to allow them to sell more gas cars in the EU market. But real world emission reduction is 20%. They know this, they've known for years. Its a scam.
https://electrek.co/2026/02/19/biggest-study-yet-shows-plug-...
Some newer toyotas, newer BMWs and the coming EREVs will actually be able to be electric cars most of the time, and might live up closer to the claims. Doesnt change the fact the category has been mostly fraud until now.