Hybrid mower

A mower comprising:

• a frame;
• a drive wheel for propelling the mower, the drive wheel coupled to the frame;
• a cutting unit configured to cut grass;
• a first motor operatively connected to the drive wheel;
• a second motor operatively connected to the cutting unit;
• a primary battery electrically connected to the first motor and the second motor to power the first motor and the second motor;
• a generator electrically connected to the first motor and the second motor to selectively power the first motor and the second motor, the generator further electrically connected to the primary battery to selectively charge the primary battery;
• and
• a control unit that can measure a charge level of the primary battery, the control unit configured to operate the mower in a first operating condition in which the primary battery electrically powers the first motor and the second motor and a second operating condition in which the generator electrically powers the first motor and the second motor and charges the primary battery;
• wherein, when the mower is in the first operating condition and the charge level of the primary battery is measured at or below a low threshold, the control unit switches the mower to the second operating condition;
• wherein, when the mower is in the second operating condition and the charge level of the primary battery is measured at or above a high threshold, the control unit switches the mower to the first operating condition.

A method of operating a mower, the method comprising:

• providing a mower comprising:
• a drive wheel for propelling the mower;
• a cutting unit configured to cut grass;
• a first motor operatively connected to the drive wheel;
• a second motor operatively connected to the cutting unit;
• a primary battery electrically connected to the first motor and the second motor to power the first motor and the second motor;
• an auxiliary battery electrically connected to the first motor to power the first motor;
• a generator electrically connected to the first motor and the second motor to selectively power the first motor and the second motor, the generator further electrically connected to the primary battery and the auxiliary battery to selectively charge the primary battery and the auxiliary battery;
• and
• a control unit that can measure a charge level of the primary battery;
• operating the mower in a first operating condition in which the primary battery electrically powers the first motor and the second motor;
• and
• switching the mower to operate in a second operating condition in which the generator electrically powers the first motor and the second motor and charges the primary battery and auxiliary battery.