Batteries and power supply

The car's own power supply is connected to several different batteries and components. These make it possible to use the car's electrical functions.

The car's primary electrical system operates with 12 V voltage and powers electrical equipment.

In addition to the primary electrical system, mild hybrid* type cars are equipped with a 48 V system.


In order to supply power to the various components, your car is equipped with the following:

  • a 12 V starter battery that powers the car's primary electrical system
  • a support battery that helps during the Start/Stop function's starting sequence. The battery is either a 12 V battery or, if the car is the mild hybrid* type, a 48 V battery that also allows regenerative braking while driving.


Mild hybrid type cars have components that work with 48 V voltage, which can be dangerous in the event of incorrect intervention. Do not touch components that are not clearly described in the owner's manual.

  • 48 V support battery must never be used for jump starting.
  • External electrical equipment must not, under any circumstances, be connected to the 48 V battery.
  • The 48 V battery may only be serviced and replaced by a workshop – an authorised Volvo workshop is recommended.
  1. * Option/accessory.