- With the exception of one fully charged KERS, the total amount of recoverable energy stored on the car must not exceed 300kJ. Any which may be recovered at a rate greater than 2kW must not exceed 20kJ.
- The maximum power, in or out, of any KERS must not exceed 60kW.
- Energy released from the KERS may not exceed 400kJ in any one lap.
- The amount of stored energy in any KERS may not be increased whilst the car is stationary during a race it stop.
- Release of power from any such system must remain under the complete control of the driver at all times the car is on the track.
- Cars must be fitted with homologated sensors which provide all necessary signals to the SDR in order to verify the requirements above are being respected.
- The KERS must connect at any point in the rear wheel drivetrain before the differential.
- The system will be considered shut down when all energy is contained within the KERS modules and no high voltage is present on any external or accessible part of any KERS module.
- The shutdown process must take no longer than two seconds from activation.
- It must be possible to shut down the KERS via the following means :
- the switch required by Article 14.2.1 ;
- the switches required by Article 14.2.2 ;
- the switch or button required by Article 9.4.
- The KERS must shut down when the ECU required by Article 8.2 initiates an anti-stall engine shut off.
- All cars must be fitted with a KERS status light which :
- is in working order throughout the Event even if the main hydraulic, pneumatic or electrical systems on the car have failed ;
- is located in the same general location s the light required by Article 8.10 ;
- is green only when the system is shut down ;
- remains powered for at least 15 minutes if the car comes to rest with its engine stopped ;
- is marked with a “HIGH VOLTAGE” symbol.