Interview Questions.

Question 1. What Is Photovoltaics (sun Electricity) Or "pv"?

Answer :

The phrase itself enables to give an explanation for how photovoltaic (PV) or sun electric powered technology paintings. First utilized in about 1890, the word has  parts: image, a stem derived from the Greek phos, which means that light, and volt, a dimension unit named for Alessandro Volta (1745-1827), a pioneer within the have a look at of electricity. So, photovoltaics should literally be translated as light-energy. And it's simply what photovoltaic substances and devices do; they convert light energy to energy, as Edmond Becquerel and others discovered in the 18th Century.

Question 2. How Can We Get Electricity From The Sun?

Answer :

When sure semiconducting substances, consisting of positive forms of silicon, are exposed to daylight, they release small amounts of strength. This technique is referred to as the photoelectric impact. The photoelectric effect refers to the emission, or ejection, of electrons from the floor of a steel in response to light. It is the basic physical process wherein a solar electric powered or photovoltaic (PV) cell converts sunlight to power.

Sunlight is made from photons, or debris of solar power. Photons comprise diverse amounts of power, corresponding to the unique wavelengths of the sun spectrum. When photons strike a PV mobile, they will be meditated or absorbed, or they may skip proper through. Only the absorbed photons generate power. When this takes place, the electricity of the photon is transferred to an electron in an atom of the PV cellular (that's virtually a semiconductor).

With its newfound strength, the electron escapes from its ordinary position in an atom of the semiconductor material and will become part of the modern in an electrical circuit. By leaving its role, the electron causes a hollow to shape. Special electric residences of the PV cellular—a integrated electric field—offer the voltage had to power the modern-day via an external load (inclusive of a mild bulb).

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Question three. What Are The Components Of A Photovoltaic (pv) System?

Answer :

A PV device is made up of different additives. These consist of PV modules (agencies of PV cells), which might be normally known as PV panels; one or more batteries; a fee regulator or controller for a stand-alone machine; an inverter for a utility-grid-linked device and while alternating modern (ac) rather than direct present day (dc) is needed; wiring; and mounting hardware or a framework.

Question 4. How Long Do Photovoltaic (pv) Systems Last?

Answer :

A PV machine this is designed, set up, and maintained nicely will operate for greater than 20 years. The fundamental PV module (interconnected, enclosed panel of PV cells) has no moving components and can closing greater than 30 years. The satisfactory way to make sure and expand the existence and effectiveness of your PV system is by means of having it mounted and maintained nicely. Experience has proven that most problems arise because of negative or sloppy machine set up.

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Question 5. What's The Difference Between Pv And Other Solar Energy Technologies?

Answer :

There are four foremost kinds of sun power technology:

Photovoltaic (PV) systems, which convert sunlight directly to electricity through PV cells manufactured from semiconductor substances.
Concentrating sun strength (CSP) systems, which concentrate the sun's strength using reflective devices which includes troughs or replicate panels to produce heat that is then used to generate electricity.
Solar water heating systems, which include a solar collector that faces the solar and either heats water without delay or heats a "running fluid" that, in turn, is used to heat water.
Transpired solar creditors, or "sun partitions," which use sun strength to preheat ventilation air for a building.
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Question 6. Can I Use Photovoltaics (pv) To Power My Home?

Answer :

PV may be used to strength your complete home's electric structures, including lighting, cooling structures, and home equipment. PV systems these days may be combined easily into both traditional and nontraditional houses. The most not unusual exercise is to mount modules onto a south-going through roof or wall. For an extra aesthetic appeal, a few modules resemble traditional roof shingles

Question 7. Can I Use Photovoltaics (pv) To Power My Business?

Answer :

PV structures may be combined into truely each attainable shape for business buildings. You will discover PV being used outdoors for safety lights in addition to in systems that serve as covers for parking masses and bus shelters, generating strength on the same time.

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Question 8. How Do I Know If I Have Enough Sunlight For Pv?

Answer :

A photovoltaic (PV) system wishes unobstructed get entry to to the solar's rays for maximum or all the day. Shading at the system can significantly lessen power output. Climate isn't simply a problem, because PV systems are highly unaffected with the aid of excessive weather. In fact, a few PV modules honestly paintings better in less warm climate. Most PV modules are angled to catch the sun's rays, so any snow that collects on them generally melts quick. There is sufficient sunlight to make solar energy structures useful and effective almost everywhere in California.

Question 9. How Big A Solar Energy System Do I Need?

Answer :

The length of solar system you want depends on several factors which includes how lots power or warm water or area warmth you use, how, the dimensions of your roof, and what kind of you're willing to invest. Also, do you want the machine to supply your whole power utilization or to supplant a part of your higher fee power usage You can touch a system dressmaker/installer to determine what form of gadget could healthy your desires.

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Question 10. Why Should I Purchase A Pv System?

Answer :

People decide to shop for sun power structures for a selection of reasons. For instance, a few individuals buy solar merchandise to hold the Earth's finite fossil-gasoline sources and to lessen air pollutants. Others could alternatively spend their money on an power-producing improvement to their property than send their cash to a software. Some human beings like the protection of decreasing the quantity of energy they buy from their software, because it makes them less susceptible to future will increase in the charge of energy.

If it's designed efficaciously, a sun system might be capable of offer energy at some stage in a utility power outage, thereby including strength reliability to your private home. Finally, a few people live in regions wherein the price of extending electricity lines to their home is extra pricey than shopping for a sun power device.

Question 11. How Is A Solar Electric System Designed, Installed, And Maintained?

Answer :

You ought to set up a photovoltaic (PV) or sun electric powered device yourself. But to avoid headaches or damage, you'll likely want to lease a good expert contractor with revel in in installing solar structures. PV systems have few shifting components, so that they require little protection. The additives are designed to fulfill strict dependability and durability requirements so that they can stand up to the factors. However, they're pretty sophisticated electric systems, so set up normally calls for the information and enjoy of a certified electrical equipment contractor.

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Question 12. Where Can I Find Someone Who Designs, Installs, And Maintains Photovoltaic (pv) Systems?

Answer :

We suggest you look for a PV installer or system provider inside the telephone listing beneath "Solar Energy Equipment and Systems Dealers."

It is a great idea pick out a designer or installer of solar electricity systems from the listing to your neighborhood phone book via first asking for statistics from several of them approximately their enjoy with PV systems in addition to how much their products and services cost. With a gadget designer, you can talk electricity necessities or hot water wishes on your building, daylight availability, and different essential elements, and decide the form of machine that's needed to meet your desires. System designers and installers have to be capable of offer you with cost estimates and other pertinent records.

If your property isn't yet designed or constructed, it is critical to make the constructing as electricity green as viable to lessen your PV machine's electricity necessities.

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Question thirteen. How Much Does A Solar Energy System Cost, And How Much Will I Save On Utility Bills?

Answer :

Unfortunately, there is no unmarried or easy solution. But a solar rebate and other incentives can lessen the price of a PV machine. This price depends on more than a few of factors, which includes whether or not it's far a stand-on my own machine or is included into the constructing layout, the scale of the machine, and the particular machine manufacturer, store, and installer. For sun water warmers and area warmers, you furthermore mght need to take into account the charge of the fuel used to back up the gadget. In maximum instances, you would must add the fee of herbal gasoline or power to get a greater correct estimate of how an awful lot you could anticipate to pay for a sun energy machine.

It is likewise tough to say how lots you will store with a sun strength system, due to the fact financial savings rely on how a lot you pay your application for strength or natural gasoline, and what kind of your application pays you for any excess power which you generate along with your solar gadget. You can ask your sun gadget company how tons your new machine will produce on an annual foundation and evaluate that quantity to your annual electricity or warm water call for to get an concept of how a great deal you will keep.

Question 14. What Is Net Metering? Is Net Metering Available Where I Live And Work?

Answer :

Net metering is a coverage that permits house owners to obtain the full retail fee for the power that their sun energy device produces. The time period internet metering refers back to the method of accounting for the photovoltaic (PV) machine's power manufacturing. Net metering permits house owners with PV structures to use any extra electricity they produce to offset their electric powered invoice. As the home owner's PV system produces strength, the kilowatts are first used for any electric appliances within the home. If the PV system produces greater electricity than the home owner needs, the more kilowatts are fed into the software grid.

Question 15. How Does A Solar Water-heating System Work?

Answer :

Every sun water-heating system features a solar collector that faces the sun to take in the sun's warmth strength. This collector can either warmth water directly or heat a "working fluid" that is then used to warmness the water. In active solar water-heating systems, a pumping mechanism movements heated water through the building. In passive solar water-heating structures, the water moves through herbal convection. In nearly all cases, sun water-heating systems paintings in tandem with conventional gas or electric powered water-heating systems; the conventional systems operate as needed to make sure a reliable deliver of heated water.

There are many types of solar water heaters. Each has strengths to suggest it for specific climates and water situations. Solar device experts let you pick the most suitable system on your place and your needs.

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Question 16. Can A Solar Water Heater Replace An Electric Or Gas Water Heater?

Answer :

Not completely. Conventional electric or fuel water heating structures are nevertheless necessary as a supplement to the sun water heating machine, in large part due to the fact the solar might not shine in a specific location for several days at a time. However, due to the fact solar water heaters are designed provide hot water at once to the tank of a gasoline or electric powered water heater, they reduce the need for the water heater to run on conventional fuels. And this in turn reduces your gas or electric bill. Depending on in which you stay, sun water warmers can provide up to 80% of your house's annual water-heating wishes.

Question 17. Can I Use A Solar Water-heating System To Heat My Swimming Pool?

Answer :

Using a sun gadget to heat a swimming pool is the most commonplace use for solar power in the United States nowadays. Solar pool-heating structures growth an unheated pool's water temperature with the aid of 10 degrees or extra, and they can increase the swimming season with the aid of  to a few months.

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Question 18. What Are The Benefits Of Using Solar Energy To Heat Water In My Home?

Answer :

First, the gasoline is unfastened! Once you recover the higher preliminary prices of a solar machine through reduced or avoided power expenses (this is, lower utility payments), your sun machine would require costs simplest for upkeep. And when you consist of the price of a sun water heater in a mortgage on a brand new home, the system regularly gives a fine monthly coins glide from the primary day of ownership.

Second, sun water warmers and different solar era applications do now not pollute. They do not upload to the carbon dioxide, nitrogen oxides, sulfur dioxide, and other air pollutants and wastes produced via most of latest energy plant life, even those who run on natural gas. And they let you burn less natural gas in your home, as well.

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Question 19. How Much Does A Solar Water-heating System Cost?

Answer :

Unfortunately, there's no person solution to this question. The price of a solar system depends on various of things, along with the size of the gadget and the particular gadget manufacturer, retailer, and installer. However, any sun rebates and other incentives available to your region will lessen that total fee.

For sun water warmers and space warmers, you'll additionally be thinking of the charge of the gas used to back up the machine. In most instances, you will ought to upload in the price of supplemental natural fuel or electricity to get a reasonably accurate estimate of how tons you could count on to pay for a sun machine.

Question 20. How Much Money Will A Solar Water-heating System Save On My Utility Bill?

Answer :

It is difficult to say how lots you'll keep with a sun gadget. That depends on several factors, including how much you already pay your nearby software for power or natural fuel. You can ask your sun gadget expert how an awful lot warmness your new system will produce on an annual foundation after which subtract that quantity out of your modern-day annual consumption the overall amount of power and gasoline you use to get an concept of how lots you will save. Data to your current annual consumption have to be to be had out of your software.

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