Why It Is Essential to Have Your Solar Installation Properly Connected and Registered with DGEG

Solar energy has become one of the most efficient ways to reduce costs and increase energy autonomy in homes and businesses. However, for a photovoltaic system to perform correctly and deliver the expected savings, two key aspects are essential: a technically correct installation and the mandatory registration with DGEG.

Although many systems are installed with good intentions, it is not uncommon to find incorrect wiring, improper sizing or installations that were never properly legalised. These details, while seemingly minor, can significantly affect daily performance and safety.

Poorly connected installations: a frequent issue

One of the main factors that reduces the efficiency of a solar system is incorrect panel wiring or poorly sized strings compared to the inverter. When the technical configuration is wrong, the system produces less energy than expected, forcing the user to rely more on the grid and increasing electricity bills.

Common issues include:

• Incorrectly wired panels
• Strings inadequately sized for the inverter
• Incomplete or improper electrical protections
• Configurations that do not match the actual consumption profile

These problems may go unnoticed for months or even years and usually show up only through low production, premature equipment wear or unexpectedly high energy costs.

The importance of DGEG registration

After installation, all grid-connected self-consumption systems must be registered with DGEG (Directorate-General for Energy and Geology). This process is mandatory and ensures that the installation complies with Portuguese technical and safety regulations.

Legalising the system provides several benefits:

• Official recognition of the installation
• Access to self-consumption regimes
• Possibility of selling surplus energy
• Protection during inspections and audits
• Increased electrical and operational safety

Without proper legalisation, issues may arise with authorities, insurance companies or even during property sale.

What must be verified in a solar installation

To ensure the system is performing at its best and complies with regulations, a complete technical assessment is essential. This verification should include:

• Inventory of installed equipment
• Verification of electrical protections and switchboards
• Assessment of wiring and string dimensioning
• Confirmation of compatibility between inverter and installed capacity
• Issuance of a responsibility statement by a certified technician
• Preparation and submission of the electrical project to DGEG when applicable

These steps guarantee that the system is safe, efficient and ready to operate at maximum performance throughout its lifetime.

Why this truly matters

When a photovoltaic installation is well configured and legally registered, the user benefits from:

• Higher energy production
• Lower electricity bills
• Safe and stable operation
• Increased property or business value
• Full technical and legal compliance

Conversely, a poorly connected or unregistered system may lead to energy losses, electrical risks, inability to sell surplus energy and even legal complications.

Conclusion

Installing solar panels is an excellent investment, but real savings only happen when the system is properly connected and duly registered with DGEG. These two steps ensure safety, legal compliance and maximum performance.

For new installations or to verify existing systems, Geoclima provides complete technical diagnostics, legalisation, regularisation and specialised support to ensure each installation performs as it should from day one.