Solar Design Engineer Interview Questions and Answers

Active power is the real power consumed, while reactive power supports voltage levels in AC systems.

• Active power (P) is measured in watts (W) and represents the actual power consumed by electrical devices.

• Reactive power (Q) is measured in volt-amperes reactive (VAR) and is necessary for maintaining voltage levels in AC systems.

• Example of active power: A light bulb consuming 60W of power.

• Example of reactive power: Inductive loads like motors and transformers that require react...read more

Phase voltage is the voltage across a single phase, while line voltage is the voltage between two phases in a multi-phase system.

• In a three-phase system, phase voltage is the voltage measured across one phase to neutral.

• Line voltage is the voltage measured between any two phases.

• For example, in a 400V three-phase system, the line voltage is 400V, while the phase voltage is approximately 230V.

• Phase voltage is used in single-phase systems, while line voltage is relevant in thre...read more

The number of solar panels used in a group depends on the energy requirements and available space.

• The number of solar panels in a group is determined by the total energy consumption of the group.

• Factors such as location, orientation, shading, and efficiency of the panels also impact the number of solar panels needed.

• For example, a residential group may require 20-30 solar panels, while a commercial group may need hundreds of panels.

• Calculations can be done based on the averag...read more

A hysteresis loop represents the relationship between input and output in systems exhibiting memory effects, like magnetic materials.

• Hysteresis occurs when the output of a system depends on its past states.

• Commonly seen in magnetic materials, where magnetization lags behind the applied magnetic field.

• Example: In a magnetic material, the loop shows how magnetization changes as the magnetic field is cycled.

• In mechanical systems, hysteresis can be observed in rubber bands, where...read more