An electric working machine (1; 21; 23; 25; 27; 29) comprising: a driving device configured to be driven with power-supply power from a power source; a controller configured to selectively switch an operation state of the controller to one of multiple operation states, the multiple operation states including a control operation state and a low power operation state, the controller in the control operation state being configured to control the driving device, the controller in the low power operation state being configured to consume electric power smaller than power consumption of the controller in the control operation state; an operation state determiner configured to determine the operation state of the controller; and a control power source including a first converter and a second converter, the first converter being configured to output a first control current based on the power-supply power, the first control current having a maximum value corresponding to a maximum consumption current value of the controller in the control operation state, the second converter being configured to output a second control current based on the power-supply power, the second control current having a maximum value (i) smaller than the maximum value of the first control current and (ii) corresponding to a maximum consumption current value of the controller in the low power operation state, the control power source being configured to transition to a first conversion state in response to the operation state determiner determining that the controller is in the control operation state, the control power source in the first conversion state being configured to supply the first control current to the controller, the control power source being configured to transition to a second conversion state in response to the operation state determiner determining that the controller is in the low power operation state, the control power source in the second conversion state being configured to (i) stop operation of the first converter, and (ii) supply the second control current to the controller, wherein the operation state determiner is configured to receive a first state notification signal and a second state notification signal, the first state notification signal indicating that the operation state of the controller is the control operation state, the second state notification signal indicating that the operation state of the controller is the low power operation state, the operation state determiner is configured to determine that the operation state of the controller is the control operation state in response to receipt of the first state notification signal, and the operation state determiner is configured to determine that the operation state of the controller is the low power operation state in response to receipt of the second state notification signal. a driving device configured to be driven with power-supply power from a power source; a controller configured to selectively switch an operation state of the controller to one of multiple operation states, the multiple operation states including a control operation state and a low power operation state, the controller in the control operation state being configured to control the driving device, the controller in the low power operation state being configured to consume electric power smaller than power consumption of the controller in the control operation state; an operation state determiner configured to determine the operation state of the controller; and a control power source including a first converter and a second converter, the first converter being configured to output a first control current based on the power-supply power, the first control current having a maximum value corresponding to a maximum consumption current value of the controller in the control operation state, the second converter being configured to output a second control current based on the power-supply power, the second control current having a maximum value (i) smaller than the maximum value of the first control current and (ii) corresponding to a maximum consumption current value of the controller in the low power operation state, the control power source being configured to transition to a first conversion state in response to the operation state determiner determining that the controller is in the control operation state, the control power source in the first conversion state being configured to supply the first control current to the controller, the control power source being configured to transition to a second conversion state in response to the operation state determiner determining that the controller is in the low power operation state, the control power source in the second conversion state being configured to (i) stop operation of the first converter, and (ii) supply the second control current to the controller, wherein the operation state determiner is configured to receive a first state notification signal and a second state notification signal, the first state notification signal indicating that the operation state of the controller is the control operation state, the second state notification signal indicating that the operation state of the controller is the low power operation state, the operation state determiner is configured to determine that the operation state of the controller is the control operation state in response to receipt of the first state notification signal, and the operation state determiner is configured to determine that the operation state of the controller is the low power operation state in response to receipt of the second state notification signal.