21⟩ Explain me what is an Inverter?
A device required in a Solar system that converts the direct current electricity from the solar modules into alternating current used inside most homes and business’ in America.
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22⟩ What is watt (W)?
the unit of electric power, or amount of work (J), done in a unit of time. One ampere of current flowing at a potential of one volt produces one watt of power.
23⟩ What is tracking array?
a solar array that follows the path of the sun to maximize the solar radiation incident on the photovoltaic surface.
24⟩ What is volt (V)?
standard unit of voltage; one volt produces one ampere of current when acting a resistance of one ohm.
25⟩ What is junction box?
protected enclosure for electrical wiring.
26⟩ What is direct current (DC)?
an electric current in which electrons flow in one direction only.
27⟩ What is photovoltaic efficiency?
the ratio of power produced by a solar cell at any instant to the power of radiant energy striking the cell; certain factors such as temperature can cause the efficiency rate to vary during the day.
28⟩ What is voltage?
potential energy that makes the electrical current flow in a circuit by pushing the electrons around (pressure).
29⟩ What is electric circuit?
complete path of an electric current, including the generating apparatus, intervening resistors, or capacitors.
30⟩ What is altitude?
height of the sun above the horizon.
31⟩ Tell me what is a photovoltaic cell?
The smallest semiconductor elements contained within a PV module that perform the immediate conversion of light into electrical energy. It is also called a Solar cell.
32⟩ Do you know how does a solar water-heating system work?
Every solar water-heating system features a solar collector that faces the sun to absorb the sun's heat energy. This collector can either heat water directly or heat a "working fluid" that's then used to heat the water. In active solar water-heating systems, a pumping mechanism moves heated water through the building. In passive solar water-heating systems, the water moves by natural convection. In almost all cases, solar water-heating systems work in tandem with conventional gas or electric water-heating systems; the conventional systems operate as needed to ensure a reliable supply of heated water.
There are many types of solar water heaters. Each has strengths to recommend it for specific climates and water conditions. Solar system professionals can help you select the most appropriate system for your area and your needs.
33⟩ Can you explain how much does a solar energy system cost, and how much will I save on utility bills?
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Unfortunately, there is no single or simple answer. But a solar rebate and other incentives can reduce the cost of a PV system. This cost depends on a number of factors, such as whether it is a stand-alone system or is integrated into the building design, the size of the system, and the particular system manufacturer, retailer, and installer. For solar water heaters and space heaters, you also have to consider the price of the fuel used to back up the system. In most cases, you would have to add the cost of natural gas or electricity to get a more accurate estimate of how much you can expect to pay for a solar energy system.
It is also difficult to say how much you will save with a solar energy system, because savings depend on how much you pay your utility for electricity or natural gas, and how much your utility will pay you for any excess power that you generate with your solar system. You can ask your solar system provider how much your new system will produce on an annual basis and compare that number to your annual electricity or hot water demand to get an idea of how much you will save.
34⟩ Tell us can we use photovoltaics (PV) to power our home?
PV can be used to power your entire home's electrical systems, including lights, cooling systems, and appliances. PV systems today can be blended easily into both traditional and nontraditional homes. The most common practice is to mount modules onto a south-facing roof or wall. For an additional aesthetic appeal, some modules resemble traditional roof shingles
35⟩ Explain me how can we get electricity from the sun?
When certain semiconducting materials, such as certain kinds of silicon, are exposed to sunlight, they release small amounts of electricity. This process is known as the photoelectric effect. The photoelectric effect refers to the emission, or ejection, of electrons from the surface of a metal in response to light. It is the basic physical process in which a solar electric or photovoltaic (PV) cell converts sunlight to electricity.
Sunlight is made up of photons, or particles of solar energy. Photons contain various amounts of energy, corresponding to the different wavelengths of the solar spectrum. When photons strike a PV cell, they may be reflected or absorbed, or they may pass right through. Only the absorbed photons generate electricity. When this happens, the energy of the photon is transferred to an electron in an atom of the PV cell (which is actually a semiconductor).
With its newfound energy, the electron escapes from its normal position in an atom of the semiconductor material and becomes part of the current in an electrical circuit. By leaving its position, the electron causes a hole to form. Special electrical properties of the PV cell—a built-in electric field—provide the voltage needed to drive the current through an external load (such as a light bulb).
36⟩ Can you tell me some thing about the knowledge elements you obtained from your education, training and work experience would support your solar photovoltaic installer career?
The Knowledge of machines and tools, including their designs, uses, repair, and maintenance, materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads, the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar, design techniques, tools, and principles involved in production of precision technical plans, blueprints, drawings, and models, principles and processes for providing customer and personal services. This includes customer needs assessment, meeting quality standards for services, and evaluation of customer satisfaction.
37⟩ As you know we put the safety of our employees first at First Solar which includes extensive safety training for our new hires. Walk me through your current safety training and safety related education?
I am formally trained in Fall Arrest, WHMIS as well as Confined Space. I have been an ESTS trainer as well. In addition to this experience, I have many hours of on-site safety training in my previous roles. I brought my current documents with me if you would like to make a copy. I am confident that my level of effort when it comes to safety will meet your high expectations
38⟩ Explain me what Happens When The Solar Energy Generated Is More Than What We Need Or If It Is Less Than What We Need?
Solar energy is infirm power, and that is why, we either sync it to the Electricity Grid or have a battery backup or Sync it to a DG set. For Industrial applications, we sync with grid or DG.
When the solar power generated from the plant is less than what is required by your load, the additional required energy will be drawn from either grid or DG for supplying the load. If it is more than what is required, it can be fed back to the Grid, provided you have a net meter connection.
39⟩ Do you know how much money will a solar water-heating system save on my utility bill?
It is difficult to say how much you will save with a solar system. That depends on several factors, including how much you already pay your local utility for electricity or natural gas. You can ask your solar system professional how much heat your new system will produce on an annual basis and then subtract that number from your current annual consumption—the total amount of electricity and gas you use—to get an idea of how much you will save. Data on your current annual consumption should be available from your utility.
40⟩ Explain me what are the skills required for solar photovoltaic installer employee in order to success in his work?
Installing equipment, machines, wiring, or programs to meet specifications, Giving full attention to what other people are saying, taking time to understand the points being made, asking questions as appropriate, and not interrupting at inappropriate times, Using logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions or approaches to problems, Monitoring/Assessing performance of yourself, other individuals, or organizations to make improvements or take corrective action, Understanding the implications of new information for both current and future problem-solving and decision-making.
