The practical difference between mild, full and plug-in hybrids

Short answer: a mild hybrid uses a small electric motor only to assist the combustion engine. A full hybrid can drive short stretches on electric alone and recovers energy by itself. A plug-in has a larger battery, recharged from an outlet, which allows more kilometers in electric mode. This text is general and recommends no models.

Mild hybrid

• How it works: a small electric motor and a low-capacity battery help with acceleration and engine start-up, and allow the engine to shut off at stops.
• Day to day: no need to charge; fuel savings are usually modest.
• Cost: generally the most affordable hybrid option.

Full hybrid

• How it works: the electric motor is more powerful, and the car can move on electric alone at low speeds and distances. The battery is recharged by the combustion engine and by regenerative braking.
• Day to day: it also needs no outlet. The gain is clearest in city traffic, with many stops.
• Cost: usually more expensive than the mild one, and savings depend on use.

Plug-in hybrid (PHEV)

• How it works: a larger battery, rechargeable at an outlet or charger, allows a stretch in electric mode before the combustion engine steps in.
• Day to day: people who charge often and make short trips can use little fuel. Those who do not charge end up carrying the battery's weight without using it.
• Cost: usually the most expensive of the three, and depends on having somewhere to charge.

How to choose

1. If you drive little on urban routes and want ease, a full hybrid may do.
2. If you make short daily trips and have somewhere to charge, the plug-in can be the most economical.
3. If you want something simple, with no change of habits, the mild hybrid is an option.

Counterpoints

Advertised consumption figures do not always reflect real use. Check electric range, battery warranty, maintenance cost and the availability of charging in your routine before deciding.