One of the biggest advantages of solar photovoltaic energy today is home self-consumption. By installing solar panels in your home, you can generate your own electricity, thus reducing your dependence on the grid and achieving considerable savings on your electricity bill. However, one of the most frequent questions among those considering this option is whether it's possible to install solar panels yourself without the need for a specialized company.
In this article, we'll take a closer look at how you can install your own solar panels, consider whether it's actually worth doing it yourself, and look at the advantages it offers over grid-supplied electricity.
Can someone install solar panels themselves?
The short answer is yes, it is possible to install solar panels yourself. These days you can buy all the necessary equipment for a photovoltaic installation at specialized stores or even online. However, while installing solar panels may seem simple, it is a process that can involve risks if not done correctly.
The process involves handling electrical components and connecting multiple cables at heights, which can cause serious damage, such as fires or short circuits if proper measures are not followed. In addition, you should bear in mind that regulations impose certain requirements to legalise the installation, which can only be managed by an accredited professional.
If you decide to do it yourself, it is essential that you thoroughly study all the steps of the process before you begin, and strictly follow the manufacturer's instructions. You need to make sure you choose the right panels, calculate the materials and available space well, and ensure that the entire installation complies with local regulations.
Risks of installing solar panels without professional help
There are several challenges that may arise if you decide to install solar panels without professional help. These include:
- Incorrect location: If solar panels are not oriented correctly and do not receive enough sunlight, their efficiency will decrease considerably.
- Oversized or undersized installation: Without proper energy consumption calculations, you could end up installing too many panels, which will increase costs without actually getting the performance you are looking for.
- Electrical errors: Making mistakes with electrical connections can cause blackouts or even irreparable damage to solar panels.
- Loss of warranty: Many solar panel manufacturers require installation to be performed by an authorized installer to provide the appropriate warranty.
- Lack of permissions: Failure to obtain appropriate permits can lead to financial penalties or, worse still, the obligation to dismantle the facility.
Despite these points, if you are determined to install the panels yourself, read on to learn the key steps in detail.
How to install solar panels yourself
To install solar panels yourself, it is important to follow the steps precisely. Here we explain the correct way to do it.
Step 1: Install the photovoltaic system support
The first step is to mount the brackets where the panels will be installed . The brackets may vary depending on the type of roof or surface where you're installing the panels. If you have a pitched roof, you'll likely use a coplanar system, while flat roofs require adjustable brackets that allow you to tilt the panels.
It is important to follow the manufacturer's specific instructions regarding the recommended inclination for your location. In Spain, for example, the ideal inclination for solar panels is between 20º and 30º.
Remember that panel placement is crucial: they must have maximum access to sunlight during the day, and the tilt angle must be adjusted to the sun's path to ensure optimal system performance. Any error in tilt or positioning can greatly reduce the system's efficiency.
Step 2: Secure the lid and solar panel
The next step is to attach the cover that will protect the solar panels and secure them to the supports. This process may vary depending on the pitch of the roof, but in most cases you just need to follow the instructions provided with the supports.
It is important that, once the panels have been fixed, they are well aligned and the distances between them are respected. Leaving the appropriate space will allow the panels to have the necessary ventilation, which will prevent overheating and improve their long-term operation.
Step 3: Connect the system inverter
Once the panels are mounted, you must connect the modules to each other and then to the inverter of the photovoltaic system. This device will convert the direct current (DC) generated by the solar panels into alternating current (AC), which is the form of electricity used by most electrical appliances in the home.
MC4 connectors are generally used to make these connections, which are standard in this type of installation. Make sure that all connections are tight to avoid problems later.
Step 4: Connect the energy storage
If you want to store energy for use at night or on cloudy days, you will need solar batteries. These batteries connected to the inverter can store the electricity generated during the day. Depending on the type of system, the batteries can be connected in parallel or in series.
The storage capacity required will depend on your home's electricity consumption. It is therefore advisable to carefully calculate the average consumption of your property before purchasing batteries.
If you install batteries, make sure you have a hybrid inverter capable of managing both the energy from the solar panels and the energy stored in the batteries.
Legal aspects and regulations for the installation of solar panels
Installing solar panels yourself involves not only technical issues, but also legal aspects. Depending on where you live, you may need specific permits before you begin the installation.
In Spain, since the repeal of the “sun tax”, the government has made self-consumption easier. However, it is still necessary to apply for certain permits, especially if the installation is to be connected to the electricity grid.
Permits and administrative procedures
Among the permits you may need are:
- Building permit: Depending on your municipality, it may be necessary to apply for a building permit for installation.
- Activity license: If you install the panels in an industrial or commercial building, you may need an activity license.
- Connection to the network:If you want to sell surplus energy to the grid, you must request authorization from the electricity distribution company.
Failure to comply with these requirements may result in penalties. Also, remember that if you do not have a certified installer, you could lose the aid or subsidies offered by the state, as well as the possibility of accessing compensation for surpluses.
Self-consumption is becoming more accessible and profitable, but before deciding to do the installation yourself, consider the risks and implications involved. It is always a good idea to consult a professional to ensure that the installation complies with all regulations and safety standards.
Although it is possible to carry out the installation independently, it can often be more efficient and safer to hire a specialized company to handle the entire process, from design to legalization, guaranteeing the correct operation of your photovoltaic system.