Residential
Photovoltaic Systems

A photovoltaic system is the ideal solution for lowering your electricity bill and protecting you from continuing increases in energy costs. Thanks to government incentives and tax deductions, the cost of installation is more affordable, and the investment pays for itself in just a few years. What's more, by producing clean solar energy, you reduce your dependence on the grid and optimize your self-consumption, with savings that can exceed 70 percent on energy costs.

A PV system with a storage battery allows you to use solar energy at any time, reducing your dependence on the grid and protecting you from electricity price increases. This ensures stable savings and lower environmental impact by maximizing self-consumption and reducing CO₂ emissions.

When your PV system generates more energy than you need, you can store it in a battery for later use or sell it back to the grid, getting a credit on your utility bill. In either case, you make the most of your production, reducing costs and making your home more efficient and sustainable.

A PV system has an average lifetime of 25-30 years, with a slight loss of efficiency over time. Inverters, on the other hand, have a shorter lifetime and need to be replaced after 10-15 years. With good PV maintenance, the system remains performant and provides high energy savings.

The annual output of a photovoltaic system is influenced by several elements, which determine the efficiency and energy performance of the installation. The main factors to consider are:

• Solar irradiance available at the installation site.
• Orientation and tilt of photovoltaic panels, affecting solar energy capture.
• Presence or absence of shading, caused by buildings, trees or other obstacles.
• Quality and performance of system components, including PV modules, inverter, and wiring system.
• Geographic location of the plant, with reference data available from institutional sources such as ENEA.

Taking as an example a 1 kWp rated residential PV system with optimal orientation and no shading, the average annual production in Italy can be estimated as follows:

• Northern Italy: between 1,150 and 1,200 kWh per year.
• Central Italy: between 1,300 and 1,400 kWh per year.
• Southern Italy: between 1,500 and 1,600 kWh per year.

These values are derived from statistical data based on already installed PV systems and may vary depending on the specific conditions of each installation. Customized analysis enables optimization of production and maximization of system energy efficiency.

PV modules are installed primarily on the roof of your home, but they can also be placed on terraces, canopies, or ground-mounted structures, depending on which configuration best suits your needs. To ensure an optimal installation, it is essential to evaluate:

• Available space: the roof must have sufficient free area to accommodate the solar panels.
• Exposure and tilt: To maximize solar energy production, the ideal orientation is toward the south with a tilt of about 30-35°.
• Absence of shading: trees, nearby buildings or chimneys can reduce the performance of the system, so it is important to place the panels in an area without obstacles.

The installation of the PV system is done in several stages:

1. Technical inspection: an expert analyzes the building structure and exposure conditions to define the most efficient solution.
2. Planning and paperwork: necessary inspections are carried out and applications are submitted for connection to the power grid.
3. Installation of solar panels and inverter: the modules are securely fastened and connected to the photovoltaic inverter, the device that converts solar energy into usable electricity.
4. Testing and activation: after operational testing, the system is activated and connected to the grid, allowing you to start saving on your utility bill right away.

With professional installation, your residential PV system will be efficient and reliable for more than 25-30 years, providing you with energy independence and long-term savings.