The regulations for the 2014 season limit the maximum fuel mass flow to the engine to 100 kg/h, which reduces the maximum power output from the current 550 kW to about 450 kW. The rules also double the power limit of the electric motor to 120 kW for both acceleration and energy recovery, and increase the maximum amount of energy the KERS is allowed to use to 4 MJ per lap, with charging limited to 2 MJ per lap. An additional electric motor-generator unit may be connected to the turbocharger.