An apparatus comprising: a set of actuation devices associated with a reflector in a solar array; and a selector operable to switch between a tracking state and a calibrating state, and a voltage manager and a calibration circuit configured to be electrically connected/disconnected to/from the set of actuation devices depending on a state of the selector, said voltage manager is configured to control the selector based on an electrical output of the solar array, such that when the selector is switched by the voltage manager in the tracking state, said voltage manager is configured to be connected to the set of actuation devices and the calibration circuit is configured to be disconnected form the set of actuation devices, wherein said voltage manager is configured to supply at least a portion of the electrical output to the set of actuation devices; and when the selector is switched by the voltage manager in the calibrating state, the calibration circuit is configured to be electrically connected to the set of actuation devices and the voltage manager is configured to be disconnected from the set of actuation devices, wherein the calibration circuit comprises: a power source; a set of capacitors; a set of resistors; and a switch device operable to switch between a first state and a second state, wherein switching the switch device from the first state to the second state causes the calibration circuit to apply a calibration voltage from the power source to each of the set of actuation devices when the calibration circuit is electrically connected to the set of actuation devices, and wherein switching the switch device from the second state to the first state causes the calibration circuit to stop supplying the power from the power source. a set of actuation devices associated with a reflector in a solar array; and a selector operable to switch between a tracking state and a calibrating state, and a voltage manager and a calibration circuit configured to be electrically connected/disconnected to/from the set of actuation devices depending on a state of the selector, said voltage manager is configured to control the selector based on an electrical output of the solar array, such that when the selector is switched by the voltage manager in the tracking state, said voltage manager is configured to be connected to the set of actuation devices and the calibration circuit is configured to be disconnected form the set of actuation devices, wherein said voltage manager is configured to supply at least a portion of the electrical output to the set of actuation devices; and when the selector is switched by the voltage manager in the calibrating state, the calibration circuit is configured to be electrically connected to the set of actuation devices and the voltage manager is configured to be disconnected from the set of actuation devices, wherein when the selector is switched by the voltage manager in the tracking state, said voltage manager is configured to be connected to the set of actuation devices and the calibration circuit is configured to be disconnected form the set of actuation devices, wherein said voltage manager is configured to supply at least a portion of the electrical output to the set of actuation devices; and when the selector is switched by the voltage manager in the calibrating state, the calibration circuit is configured to be electrically connected to the set of actuation devices and the voltage manager is configured to be disconnected from the set of actuation devices, wherein the calibration circuit comprises: a power source; a set of capacitors; a set of resistors; and a switch device operable to switch between a first state and a second state, wherein switching the switch device from the first state to the second state causes the calibration circuit to apply a calibration voltage from the power source to each of the set of actuation devices when the calibration circuit is electrically connected to the set of actuation devices, and wherein switching the switch device from the second state to the first state causes the calibration circuit to stop supplying the power from the power source. a power source; a set of capacitors; a set of resistors; and a switch device operable to switch between a first state and a second state, wherein switching the switch device from the first state to the second state causes the calibration circuit to apply a calibration voltage from the power source to each of the set of actuation devices when the calibration circuit is electrically connected to the set of actuation devices, and wherein switching the switch device from the second state to the first state causes the calibration circuit to stop supplying the power from the power source.