Smart Choice Properties
[ FAQ`s ]

FREQUENTLY ASKED QUESTIONS

Where can Solar Systems be installed?

Solar panels for electricity can be installed on: residential buildings, houses, terraces, shed facades. Photovoltaic modules can be installed on buildings with flat roofs or other types of coating, as well as on sloping roofs with bitumen or standard tiles. The solar power plant can be built entirely on the ground, and the best option is for the terrain to be in the correct shape and to be in an optimal location - oriented to the south, as the southern size is over 35 m.

Click here to learn more about the advantages and disadvantages of mounting on different surfaces.

What area is needed to build a solar system?

For 1kW installed power the required area is about 5-8 sq.m For 2kW installed power the required area is about 10-12 sq.m For 5-6kW installed power the required area is about 30-40 sq.m For 30kW installed power the required area is about 500 - 800 sq.m For 100kW installed power the required area is about 1200-1500 sq.m For 500kW installed power the required area is about 6000-7000 sq.m For 1 mW of installed power the required area is about 12000-13000 sq.m

What types of solar panels are there?

Solar panels are divided into several main types: monocrystalline photovoltaic panels, polycrystalline photovoltaic panels, thin-film (amorphous) photovoltaic panels, cadmium photovoltaic panels, thermal (combined) photovoltaic panels, in-graded photovoltaic panels and CIGS photovoltaic panels.

Click here for additional information

What types of solar systems are there?

Solar systems are of three main types: network, hybrid and island. Read more about each of the types here (link)

What is the size of a standard solar panel?


Although some variations in size are observed, most manufacturers have adopted a standard size that is fixed. The typical size of panels used for residential installations is 170 cm (height) per 100 cm (width), while the total size of solar panels for commercial premises is 195 cm (height) per 100 cm (width). The depth of solar panels usually varies from 3.5 to 4.5 cm, and recently more and more manufacturers have adopted a depth of 4.5 cm as a standard size.

What is the warranty period of Solar Panels?

The solar panels we offer are from world-renowned manufacturers that guarantee high quality. The standard warranty is 12 years for the product, and we also offer modules with a 25-year warranty for 80% of the initial power - ie. if you have purchased a 400Wp module, the manufacturer guarantees that in 25 years it will produce at least 320Wp.

How many Solar Panels will I need if I want to power my house?

It is possible to make approximate but not accurate calculations, as the number of panels needed to generate enough electricity for your home is determined by many components. The most important of them are: the size of the property, physical location and degree of sunshine, average annual consumption and more. If your property has an average of four hours of sunshine per day and you have chosen 325W solar panels, then one panel can generate 1300W per day (or 1.3 kWh). In case your average energy consumption is 29 kWh per day, you will need to have 23panels of 325W to supply your home with the necessary electricity.

How is the size of the solar system measured?

The size of a photovoltaic system is measured in kWp (kilowatt peak). The average energy produced per 1 kWp is 1100 kWh per year.

What does kWp mean?

This is the peak power, ie the maximum power that your solar installation would generate in the afternoon on a sunny summer day. This is not an average production capacity but the maximum achievable under perfect conditions. The electricity generated by solar panels is influenced by many factors, such as: pollution, temperature, the amount of sunshine, etc. but mostly by the hours of sunny weather during the day. All these factors change the final amount of power produced and it is difficult to determine averages. For this reason, the standard unit of measurement is the maximum achievable under perfect conditions - kWp.

Is it necessary for the construction of the panels to be made of aluminum?

It is not mandatory but this is the most preferred and safest option as it guarantees that your photovoltaic systems will withstand a minimum of 20 years of climatic factors and external weather conditions.

How much electricity does a solar system produce?

Values cannot be calculated accurately but approximately:
A photovoltaic system of 3kW installed power will produce for 1 year about 4MWh / year
A system of 5kW installed power will produce for 1 year about 7MWh / year
A system of 15kW installed power will produce for 1 year about 21MWh / year
A system of 30kW installed power will produce for 1 year about 42MWh / year.

How long is the service life of the solar system?

The service life of the solar system is influenced by many factors: the type of panels, regular maintenance, features of the terrain/surface on which they are installed. In the best case, the service life can exceed 25-30 years.

What are the main functions of solar systems?

Your solar system can perform various functions. It can be used entirely for electricity production for sale or for own consumption. In other words: if you produce electricity from photovoltaics autonomously you could use it in different ways. Apart from being entirely for household needs, you can sell it entirely for the generated electricity or partially - only when you have a surplus.

Can the produced energy be sold?

Yes, you have the opportunity to sell both all the energy produced and only part of it. You can submit at preferential prices set by the EWRC or at prices freely agreed by you entirely on the free market, depending on the installed capacity of the solar system.

Are Solar Panels Hail Stone Protected?

The solar panels we use are made of specially tempered glass that has been tested and meets the requirements of international standards. However, we advise our customers to insure their photovoltaic installations, especially in cases where you have taken advantage of a credit option.

Do Solar Panels Work in Cold and Cloudy Weather?

Yes, it is possible because solar panels generate energy not from solar heat but from light. In fact, the cold climate creates optimal conditions for the efficiency of solar modules and the heat reduces their productivity. Studies show that most panels lose their effectiveness at temperatures above 25-27ºC.

Is the price for buying energy from the state guaranteed?

Yes, the state guarantees the purchase price at which they are buying from you.

What are the average annual hours of sunshine in Bulgaria?

The average annual amount of sunshine is about 1,380 hours.

What is the average annual number of sunny days in Bulgaria?

The average annual amount of sunshine is about 1,380 hours.

What category should be the land on which the facility is built?

The law does not allow the construction of a photovoltaic plant on fertile agricultural land, especially land of a higher category (1st to 4th). Solar equipment can only be placed on a low ground category land (7th, 8th or 9th category).

What does the mandatory maintenance of solar panels include?

It is necessary to clean and wash the surface of the panels every 2-3 months, especially if the facility is located in a more dusty area. More intensive care is needed especially during the Spring-Summer season, when the level of dusting is higher.

If we conclude a contract with ERP as a legal entity, must the natural person who owns the property necessarily be the owner of the legal entity?

Not necessarily. It is possible to do it with a lease agreement and the other option is with an established building right with a lease agreement from the Municipality.

Are our services available only for the territory of Bulgaria?

Certainly, we offer services only on the territory of the country.

What are the credit opportunities and what is the deductible? Does it change according to the power and size of the plant. What are the approximate terms for repayment of the loan?

The deductible is at least 20%, and the terms for repayment of the debt vary according to the capacity and individual conditions of the respective financial institution. They are usually within 6 to 15 years.

How long does the procedure for legalization of the photovoltaic system take?

Administrative procedures take on average between 3 and 6 months.

How long does it take to build the photovoltaic system itself?

With proper documentation the physical installation of the facility takes no more than 15-20 days.

Didn't find an answer?

Do not hesitate to contact us for a consultation! We will be happy to answer you as soon as possible!

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