5 things to know before buying a solar panel

Buying photovoltaic solar panels is the choice of 99% of people who decide to produce their own energy. Because? Simply because this technology is the one that has the best results and benefits in domestic environments.

Among the advantages we can get a up to 95% reduction in the electricity bill, ceasing to worry about the future price of energy, in addition to sustainability with a source of green and clean energy.

If to this we add the continuous fall in the prices of photovoltaic panels and a few attractive financing lines, the result is an increasingly accessible solution for the whole population.

In this article, we put together the most essential tech information for those planning to buy and install their first solar panel.

Buying a solar panel: 5 things to know.

1. How does it work?

Solar panels transform sunlight directly into electrical energy through a process known as the photovoltaic effect.

This happens within each of the solar cells that make up a panel, which may have 60 or 72 in the models currently sold on the market.

During the day, all sunlight reaching the plates is converted into energyboth direct and diffuse radiation, that is, light reflected from clouds.

For this reason, even on cloudy or rainy days, the plates continue to generate energy, albeit in lesser amounts.

But the solar panel is just one of the pieces of equipment that makes up a photovoltaic system, a technology used in solar power generation in homes and businesses.

A photovoltaic system uses a set of equipment, which we call a solar kit.

Once produced, the energy from the plates must pass through another important piece of equipment in the system: the solar inverter.

The role of the inverter is to adapt the power of the plates to the standard used by our electrical network and our electronic equipment. After being converted, the energy can now be distributed.

2. Installation.

In order for the solar panel to capture as much sunlight as possible, it must be installed in a suitable location, which is usually the roof of buildings.

Another factor related to the amount of light reaching the solar panel is the direction and slope of the roof.

The ideal direction for solar installations in all countries of the southern hemisphere is north, the reverse being the case in countries of the northern hemisphere.

The ideal tilt angle of the roof should be the same as the latitude where the property is located, or less.

Thus, when necessary, the correction of the direction and the angle of the solar panel is done through support structures.

Likewise, if the roof is not suitable, support structures are used to install the panel directly on the ground.

3. durability.

Even if it is exposed to the elements on the roof, the solar panel has a standard lifespan of at least 25 years. Everything will depend on the quality of the panels.

The loss of efficiency when converting light into energy is minimal and major manufacturers guarantee 80% of the generation at the end of this period.

In other words, a module, until the 25th year of life, will generate at least 80% of the amount of energy it initially generated.

The PV inverter, which is the other major piece of equipment in the system, has a minimum useful life of 15 years.

If you receive the necessary maintenance, it can be even more.

4. Maintenance.

But don’t think these talks are too frequent.

Even if they work long hours every day, photovoltaic systems require very little maintenance.

The main one, which you can do yourself, is cleaning the solar modules.

But this is only in the event that they are very dirty, which is not common, because they have a non-stick film that prevents the accumulation of dirt. In the case of dust, rainwater wins out.

However, in the event of contamination or bird droppings, cleaning is simple and only requires a jet of water and a soft-bristled broom.

In addition, electrical maintenance of the system is also required, but much less frequently.

Once a year is sufficient to ensure the optimization of the generation of the system.

5. How to buy.

The easiest and safest way to buy a solar panel is through a solar energy company.

By choosing this path, all the steps, processes and documentation necessary for the installation of your project are the responsibility of the company.


Given the specific characteristics of your project, the company must carry out the sizing of the system and prepare the commercial proposal for your project.

In addition to the final price of the system, the proposal also includes the models and brands of the equipment to be installed and the methods of payment / financing.

Technical visit.

Once the proposal is closed, the company’s technical team will come to your home to collect the information necessary for the project and the installation of your system.


Based on the information gathered, the engineering team carries out the executive design of your system using specific software that ensures maximum system optimization.

This project is also sent to the distributor in your region to formalize the request for connection to the electricity network.


This is the fastest part of the whole process, between 3 and 4 days for a small home installation, when the installation team comes to your home to run the project.

At this time, all equipment is installed, connected and tested, ensuring that the system is in perfect working order.


After installation, a visit from the distributor’s technical team will arrive for the final inspection of the project.

At the end of the inspection, if everything is correct, the connection of the system with the network is terminated.

Now you can enjoy clean, economical energy in your home.

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