Photovoltaic Panels

Installing photovoltaic panels makes sense when there is regular electricity consumption and adequate solar exposure. This type of solution is suitable for houses, multi-family buildings, and businesses that want to reduce energy costs and increase autonomy. The decision should consider the consumption profile, available area, roof orientation, as well as the technical framework of the system, to ensure financial return and real efficiency.

The most common photovoltaic panels in Portugal are monocrystalline and polycrystalline panels. Monocrystalline photovoltaic panels have higher efficiency and better performance in limited spaces. Polycrystalline photovoltaic panels tend to be more economical but require a larger area to achieve the same output. The choice should consider the available space, production goals, and budget. Count on BIGAVAC's specialised technical support to evaluate the most suitable photovoltaic system for your consumption. Contact us!

Photovoltaic panels produce electricity from solar radiation. Solar thermal panels produce heat for water heating. These are distinct technologies with different purposes, although complementary. The choice depends on energy needs: electricity consumption, domestic hot water production, or a combination of both in an integrated system.

In most cases, yes, it is worth installing photovoltaic panels in a house, provided the system is correctly sized. Houses with daytime consumption benefit most from direct self-consumption. Viability will depend on the roof orientation, the existence of shading, consumption habits, and the possible integration with batteries. A prior technical analysis is essential to confirm the real benefit. At BIGAVAC, you will find technical support to select the right photovoltaic panel for your project. Contact us!

With photovoltaic panels without a battery, the energy produced is consumed immediately, which reduces the electricity bill. With photovoltaic panels with a battery, it is possible to store energy for later use, which increases energy autonomy and also reduces the electricity bill. However, batteries involve an additional initial investment. The decision should always consider the consumption profile, the difference between daytime and nighttime consumption, and energy independence goals. Have questions? Speak with BIGAVAC's technicians.

The expected production of a photovoltaic system depends on the installed power, local solar radiation, the orientation and tilt of the roof, as well as system losses. Generic estimates can be misleading. To obtain reliable values, it is necessary to assess the installation site and the consumption profile. An adjusted technical calculation allows the system to be correctly sized and production expectations to be aligned.

Shading, dirt, connection failures, poorly configured inverters, or incorrect sizing are among the most common causes of low production in a photovoltaic system. While the natural degradation of photovoltaic panels is slow, maintenance and monitoring are also essential to avoid low production. Identifying the source of the problem allows energy losses to be corrected and ensures the system operates within expected parameters.

Connecting photovoltaic panels to the electrical grid requires compliance with technical and legal requirements, including system registration and conformity. The process varies depending on the installed power and the self-consumption regime. Correct compliance ensures safety, legality, and the possibility of production monitoring, avoiding future problems in system operation.

The power varies depending on the technology and model, and is normally expressed in watts-peak. However, the individual power of the photovoltaic panel should be analysed in the context of the complete system. More relevant than the isolated power is the suitability of the set of panels to the actual consumption needs. Contact us so our professionals can answer all your questions.

Yes, there are legal requirements for installing photovoltaic panels on rooftops. The installation must comply with technical, safety, and legal framework rules, which include communication to the competent authorities when applicable. In collective buildings or specific areas, additional rules may apply. Prior verification of the legal framework ensures compliance and avoids constraints after installation.