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Energovision s.r.o.

Lamačská cesta 1738/111
841 03 Bratislava – mestská časť Lamač

IČO 53036280
DIČ 2121238526

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What is photovoltaics and how does it work?

Solar energy is the most affordable and cleanest form of renewable energy we can get. The use of the sun’s rays to generate electricity is dealt with by photovoltaics. Its benefits include renewability, independence, long-term savings on electricity bills and low maintenance costs.
The main components of a PV system are:
Photovoltaic panels – Consist of a group of small cells made of semiconductor material. In them, sunlight is converted into electricity – direct current (DC) is generated.
Photovoltaic inverter – DC electricity goes into an inverter that converts it into alternating current (AC), which is used to run a home, office or business.
Battery storage – Is an optional feature of photovoltaics. The best use of solar energy is to consume it while it is being produced. If there is a requirement to store energy and consume it during non-sunny hours, solar energy can be stored in battery storage for later consumption.

What is the difference between photovoltaic panels and solar collectors?

Most of the solar energy that reaches our Earth through the Sun’s rays is in the form of “light” and “heat”. A photovoltaic system harnesses “light” energy and converts it into electricity, which can then be used to run electrical equipment. A solar thermal system uses the “thermal” energy of the sun, and the solar collector captures this heat or thermal energy and uses it to heat water.

Which technology is right for me?

Both the photovoltaic device and the thermal system are suitable for you. If you need to run electrical and electronic equipment such as lights, fans, televisions, computers and more, photovoltaics is the right solution for you. However, if you require a solution for heating water in bathrooms, kitchens or swimming pools or for heating, a thermal system is a better choice.

How much does solar energy cost?

We believe that solar energy is for everyone because it is practical for free!

What is the difference between an on-grid system and a hybrid system?

ON-GRID (sun – panels – electricity)
ON-GRID systems are the most common way of using solar energy in households, guaranteeing savings on electricity costs. This photovoltaic solution is designed exclusively for use in cooperation with the distribution grid. The photovoltaic voltage converter will work harmoniously with the grid energy, using all the solar energy as a priority and only when there is a shortage of solar energy will it start using energy from the distribution grid.
HYBRID (sun – panels – battery – electricity)
Hybrid systems supply the household with energy from photovoltaics and include a battery to store solar energy, which serves as a resource when the energy from the photovoltaic panels is not available – in the event of bad weather. Energy from the grid is used as a backup source when the panels cannot cover the household’s consumption and the battery runs down.

What are the benefits of green energy?

Reasons why we think PV is worth it!
Save money on your energy bills – generating your own energy means you reduce your energy bills every year.
Earn extra € – sell all the excess energy back and you’ll be helping to make the energy grid greener.
You protect the environment – solar panels do not produce greenhouse gases or pollute the air. Every kilowatt hour (kWh) of solar energy that is generated will significantly reduce emissions of greenhouse gases such as CO2, as well as other hazardous pollutants such as sulphur oxides, nitrogen oxides and particulate matter.
The right long-term investment – a PV system will last for decades.
Increased property value – Photovoltaics are considered a technological addition, the purchase of which will increase the value of the property. It becomes more attractive and more valued after the installation of a photovoltaic system.

What happens if the distribution network goes down?

If the power goes out in your area, the photovoltaic system connected to the common grid will also be switched off. It is not safe to send power to the grid where workers are trying to solve a power outage problem.

What solar panels do you use?

We use monocrystalline solar panels, which are more efficient because they contain cells that are cut from a single crystalline silicon ingot. They have a uniform black appearance, which adds to the property’s elegance.
Given that solar panels are meant to provide a long life, quality is one of the most important factors when choosing a brand and product. That’s why we choose reliable products from Europe’s largest and energy leader – Qcells. Their innovative approach offers several advanced technologies that enhance product performance and reliability. Qcells is the first solar module manufacturer to surpass the most comprehensive quality program in its industry – the “Quality Controlled PV” certification from the independent institute TÜV Rheinland, which consists of four levels.

Are solar panels worth it?

It certainly does. Although the upfront investment is high, the price of solar panels has come down significantly in recent years, making PV an increasingly attractive option for households and businesses looking to reduce their energy costs or decentralize away from the traditional grid.

Do photovoltaic panels generate energy when the sun is not shining?

Photovoltaic panels work best in ideal conditions of 25°C. However, the panels also produce energy on cloudy days or during snowfall. They can still produce as long as there is a little light.
Ideally, the panels are installed on a south-facing roof, where most of the sun’s rays are captured.

When will the investment in photovoltaic panels pay off?

The return on investment depends on several factors, such as the consumption of your household or company, the size and quantity of the panels or the amount of solar radiation you will consume. As part of our consulting services, we offer preliminary analyses of production, consumption, utilization and return on investment.

What is the installed capacity of the equipment we can install per household?

Households are covered by the so-called. small power sources up to 10 kW.

What is the installed capacity of the equipment we can install per company?

Businesses are allowed to use the so-called. local source up to 500 kW.

Is it necessary to obtain a building or other permit?

You only need planning permission for solar panels if your home or business is protected or located in a conservation area. If you do not know this, please contact your local building authority for details.

What all do you cover in the framework of customized photovoltaics?

We provide energy management and support in terms of data acquisition and analysis, or picking up on things that are special about the project, so that we can design a suitable PV installation. We will take care of all the administration for you, as the different steps build on each other and it is better to have support throughout the whole process. We also provide the implementation of the photovoltaic system and to ensure that it works properly 24/7, we are dedicated to monitoring and servicing.

How does the process work?

We will install a support structure on the roof, on which we will attach photovoltaic panels with power optimizers. We then connect the panels on the roof to the inverter using DC cabling.
Depending on the type of roof, work on the roof can be noisier, for example when drilling or abrading tiles. We can deal with any type of roof, whether it is flat or pitched, but also with different types of roofing (baked or concrete tiles, metal roofing).
During the installation of the photovoltaic system, minor structural modifications may also be necessary, which will be defined during the property inspection.