Electrified fire fighting vehicle

An electrified fire fighting vehicle comprising:

• a chassis;
• a cab coupled to the chassis;
• a body coupled to the chassis rearward of the cab;
• an axle coupled to the chassis;
• a battery pack having a maximum capacity;
• a driveline coupled to the axle, the driveline including an engine and an electric motor coupled to the battery pack;
• a pump system;
• and
• a controller configured to:
• operate driveline in an electric mode with the engine off where the electric motor drives the axle to provide a first performance condition;
• monitor a state of charge of the battery pack;
• provide an indication to an operator of the electrified fire fighting vehicle that the state of charge is at a first, higher threshold;
• in response to the indication, (a) receive a first input from the operator to maintain the first performance condition or (b) receive a second input from the operator to continue operation in the electric mode;
• start the engine in response to the first input to maintain the first performance condition and the state of charge;
• de-rate operation of the electric motor in response to the second input to provide a second performance condition;
• start the engine in response to the state of charge being at a second, lower threshold;
• prevent charging the battery pack using a mains power source beyond a charge threshold to maintain an amount of storage capacity between the charge threshold and the maximum capacity;
• permit charging the battery pack beyond the charge threshold using energy generated during one or more regenerative braking events;
• and
• permit charging the battery pack beyond the charge threshold up to an overcharge threshold in response to receiving a certain mode selection corresponding with a pump charge mode;
• wherein the second performance condition is lower than the first performance condition;
• wherein the second performance condition is at least a minimum performance condition for at least one of acceleration or top speed;
• wherein the overcharge threshold is greater than the charge threshold but less than the maximum capacity;
• and
• wherein the overcharge threshold is sufficient for the battery pack to supply energy to perform a pump test on the pump system.