Telling the three apart
A conventional hybrid uses a small battery charged by the engine and by braking; it never plugs in and its advantage is largest in stop-and-go driving. A plug-in hybrid adds a larger battery and a plug, giving a limited electric-only range before operating like a hybrid.
A battery-electric vehicle has no combustion engine at all. Which of the three suits you depends far more on your daily distance and charging access than on any specification.
- Conventional hybrid: no plug, best in city driving
- Plug-in hybrid: limited electric range, then hybrid operation
- Battery-electric: no engine, charging access is the deciding factor
- Fuel-cell vehicles exist but depend on very limited refuelling infrastructure
Charging in practice
Level 1 charging from a household outlet adds only a few miles of range per hour, which suits short commutes and plug-in hybrids. Level 2 on a 240-volt circuit typically fills a battery overnight and is what most battery-electric owners want.
DC fast charging is for travel, not daily use. Charge rates taper substantially as the battery fills, so stopping around 80 percent and driving on is usually faster overall than waiting for a full charge.
- Level 2 installation requires a licensed electrician and a load calculation
- Charge rate tapers as the battery fills: the last 20 percent is slowest
- A cold battery charges slowly until preconditioned
- Most manufacturers advise fast charging for travel, not as the daily default
Batteries and their warranty
Hybrid and electric drive batteries carry separate, longer warranty coverage than the basic vehicle warranty, and it typically transfers to subsequent owners. The clock runs from the original in-service date.
On a used electrified vehicle the battery's state of health is the single most valuable piece of information, and there are several ways to measure it instead of trusting a description.