Kay Cee Energy & Infra Interview Questions and Answers

Solar cells are devices that convert sunlight into electricity, while solar modules are made up of multiple solar cells connected together.

• Solar cells are typically made of silicon and other materials that can generate electricity when exposed to sunlight

• Solar modules, also known as solar panels, are made up of multiple solar cells connected together to increase the amount of electricity generated

• Solar cells and module...read more

Solar module RM specifications include size, efficiency, material, and warranty.

• Size: Typically ranges from 60 to 72 cells for residential use.

• Efficiency: Higher efficiency modules can convert more sunlight into electricity.

• Material: Most common materials include monocrystalline silicon, polycrystalline silicon, and thin-film.

• Warranty: Usually comes with a warranty ranging from 20 to 25 years.

Eva and Poe are two different costing methods used in accounting.

• Eva costing is based on the assumption that all costs are variable, while Poe costing separates costs into fixed and variable components.

• Eva costing is simpler and easier to implement, while Poe costing provides a more accurate representation of costs.

• Example: Eva costing would allocate the entire cost of a production run to the units produced, while Poe ...read more

Reliability testing procedures for solar modules according to IEC standards involve various tests to ensure durability and performance.

• IEC 61215 and IEC 61646 are the standards for reliability testing of crystalline silicon and thin-film solar modules, respectively.

• Tests include thermal cycling, damp heat, humidity freeze, mechanical load, and UV exposure.

• These tests simulate harsh environmental conditions to assess th...read more

The parts of an inverter include DC input, power transistors, transformer, output filter, and control circuit.

• DC input: where the direct current is supplied to the inverter

• Power transistors: responsible for converting DC to AC

• Transformer: used to step up or step down the voltage

• Output filter: smoothens the output waveform

• Control circuit: manages the operation of the inverter

The formula for radiation of the day is based on the Stefan-Boltzmann law, which states that the total energy radiated per unit surface area of a black body is directly proportional to the fourth power of the body's absolute temperature.

• Radiation of the day is calculated using the Stefan-Boltzmann law: P = σAT^4

• P represents the power radiated per unit area, σ is the Stefan-Boltzmann constant, A is the surface area, and...read more

Challenges faced in previous plant and how they were overcome

• One challenge was outdated equipment causing frequent breakdowns

• Implemented a preventive maintenance schedule to address the issue

• Another challenge was lack of skilled manpower

• Conducted training programs and hired experienced technicians

• Difficulty in meeting production targets due to inefficiencies

• Implemented lean manufacturing principles to streamline proces...read more