Sol Viva

Selling a House with Solar Panels in Portugal: The Complete Transfer Guide

John Wallace
Mar 27, 2026By John Wallace

If you’re selling a home in Portugal with solar panels, there’s something most people, including estate agents, get wrong:

Your solar system does NOT automatically transfer with the property.

And if handled incorrectly, it can lead to:

  • Lost income from solar production
  • Legal non-compliance
  • Delays and frustration for the buyer

This guide explains exactly how it works, and how to avoid costly mistakes.

The Rule Most People Miss: 700W Is the Threshold

In Portugal, if your solar system is larger than 700W (0.7kWp), it must be registered with DGEG (Direção-Geral de Energia e Geologia).  It you have a solar plant that has more than 2 panels, then it needs to be registered.

So, if you are buying or selling a property, you should check:

  • Is the solar plant on the property registered or not?
  • If it is not registered, then you should ensure that it gets registered prior to selling or buying a property.  
  • If it is registered, then you you need to go through the formal transfer process to move it to the new owners.

How To Check If Your System Is Registered

The quickest and easiest way to if your solar plant is registered is to contact the grid operator (E-Redes) directly. As of 2026, these are the steps:

  • Call e-Redes (the national electricity distribution system operator in Portugal).  You can call them on +351218100100.  
  • They have an English option and are really pleasant to deal with
  • Give them the details of the person that pays the bill (Name, NIF). They may also ask for the CPE of the property which you can find on one of your bills. 
  • Say to them that you had a solar plant installed and you want to check if it is set up for self consumption and has been registered.
  • They will give you a simple yes/no answer.

What to Do If Your Solar Plant Is Not Registered

There are quite a few steps to registering a solar plant, including ensuring and assuring that the installation is certified.  So, if you find yourself in a situation where you suspect or know that your solar plant is not registered, reach out to Sol Viva.  We will complete a technical site visit and complete the registration for you.  

Transferring Your Solar Plant to A New Buyer

When you sell a home with a solar plant >700Wp, then you are transfering:

  • A registered energy asset (UPAC)
  • A grid connection
  • A producer ID (CPE)
  • Possibly a contract that generates income

And none of this transfers automatically with the house.

The Key Requirement: Transfer the UPAC

When you sell your property:

  • The solar registration stays in the seller’s name
  • The buyer cannot legally operate or sell surplus energy

You MUST complete:

  • “Alteração de titularidade” (change of ownership) via DGEG
  • This is the official and mandatory step.

Step-by-Step: How to Transfer a Solar System

1. Complete the Property Sale

The escritura (deed) proceeds as normal.

The solar system should be explicitly included in the sale. 

2. Buyer Registers on the DGEG Portal

The new owner must:

  • Create an account
  • Register as the new self-consumer 

3. Submit Ownership Transfer

Inside the portal:

  • Select UPAC ownership change
  • Enter existing system details
  • Submit request

This is the critical legal action. 

4. Provide Documents

Typically required:

  • Property deed
  • Seller consent/declaration
  • UPAC registration details
  • Buyer identification (NIF)

5. DGEG Approval

Once approved:

  • The system is legally transferred
  • The buyer becomes the official producer

6. Update Energy Contracts (Often Missed)

Electricity Supply: Transfer or create a new household contract

Solar Surplus Agreement: Re-sign with the energy buyer

Payments do NOT automatically transfer. 

7. Don’t Forget the Production Meter SIM Card and Monitoring Setup

For larger solar systems, there may also be a production meter with a GSM communication module and SIM card.

This setup is often used to send production data remotely and support monitoring or reporting requirements.

When the property is sold, this part of the system is often overlooked.

In many cases, the meter stays in place, but the SIM card or data service may still be linked to the previous owner, installer, or service provider. That means the new owner could end up with a working solar system but no access to monitoring, no production visibility, or an inactive communications setup.

As part of the handover, the seller should confirm whether there is an active SIM or monitoring service attached to the production meter. If there is, that service may need to be cancelled or transferred, and the new owner may need a new SIM, new monitoring access, or support from an installer to reconnect the system properly.

In other words: transferring the UPAC is not always enough, the communications and monitoring setup may also need to be handed over separately.

Common Mistakes (and Why They Matter)

“It transfers with the house”

It doesn’t - and this causes most problems.

Forgetting contract updates

Result:

  • Seller continues receiving payments
  • Buyer earns nothing 

Re-registering instead of transferring

This can:

  • Delay the process
  • Risk losing grid permissions 

Ignoring system complexity

Many systems include:

  • A production meter
  • A separate production CPE

These must be aligned with the new owner.

Forgetting the production meter SIM card or monitoring handover

The system may still produce electricity, but the new owner may lose visibility, reporting, or remote access. Ensure the new owner obtains a new SIM of their own to ensure continuity of monitoring service.

Pro Tips for a Smooth Sale

Before the sale

Seller should gather:

  • UPAC registration
  • CPE numbers
  • Energy contracts

Add a clause to the sale agreement

Example:

“The UPAC solar installation will be transferred to the buyer via DGEG within X days of completion.”
 
After completion

Buyer should:

  • Transfer electricity contract
  • Submit UPAC ownership change
  • Re-sign surplus agreement

Why This Is a Big Deal for Expats

Portugal is one of Europe’s best solar markets, but:

  • Processes are bureaucratic
  • Documentation is in Portuguese
  • Estate agents often don’t understand solar

Many buyers unknowingly purchase systems they can’t fully use yet.

Property Sale Checklist

To help you with the steps you should take when selling your home, we have created a handy checklist that you can download and use.  This will ensure you as the seller, or the seller or a property you are buying doesn't miss anything.  

Download the checklist here.

How Sol Viva Helps

At Sol Viva, we make sure your solar system is legally transferred, fully operational and financially optimised.

We handle:

  • UPAC ownership transfers
  • Contract setup and optimisation
  • System checks and performance reviews
  • Maximising your solar return

Read all about our Solar Handover service here and contact us if you need help.

Final Takeaway

If your solar system is:

Above 700 W (which almost all are)

Then selling your home requires three separate steps:

  • Property sale
  • UPAC ownership transfer (DGEG)
  • Energy contract updates

Miss one, and the system doesn’t fully work.

If you’re buying or selling a solar-powered home in Portugal, getting this right can save:

  • Weeks of delays
  • Lost income
  • Unnecessary headaches