| Series Architecture |
Parallel Architecture |
Series-parallel Architecture |
| Receives mechanical power only from the electric motor. |
Receives mechanical power from both the electric motor and the engine. |
Receives mechanical power from both the electric motor and the engine. |
| In a series drive train, the motor is usually smaller because it only has to meet certain power requirements. |
In a parallel drive train, the motor is usually larger because it should be able to drive the vehicle. |
In a series-parallel drive train, the motor is usually larger because it should be able to drive the vehicle. |
| The battery is usually more powerful than parallel hybrids to cover the remaining energy demand. |
The battery usually has less capacity than series hybrids. |
The battery usually has less capacity. |
| Expensive |
Cheaper than others |
Expensive |