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Connecting a home solar system to Mallorca’s electricity grid requires an authorised installer, the correct self-consumption modality, Balearic administrative filings and confirmation that the meter and contracts are ready. Start by reading your electricity bill to identify the distributor and CUPS, then have the installer choose the connection route: no surplus, surplus under 15 kW on urbanised land, or a system that needs the distributor’s full access-and-connection process. Do not energise a new installation until it has been certified, registered and its measurement configuration has been checked.
The practical sequence is: identify the network operator; choose the modality; obtain a CAU or access case where required; complete town-hall and regional procedures; build and certify the system; verify metering; and update the access and supply contracts. The exact forms, fees and review times depend on the property, municipality, system size and network conditions.
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Who actually connects a solar system in Mallorca?
The electricity distributor operates the local network, approves the physical connection and manages the meter and network data. The electricity retailer (the company that bills you) manages your supply contract and, if you choose an eligible surplus arrangement, the compensation contract. They are different roles, so sending a surplus request to the retailer does not replace the distributor’s connection or legalisation process.
Mallorca follows Spain’s self-consumption framework, including Royal Decree 244/2019. The Balearic Government’s small-power workflow adds the regional and municipal steps. Your installer should coordinate the technical file, but the property owner remains responsible for supplying accurate ownership, CUPS and planning information.
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What should I check on my electricity bill first?
Find the most recent bill before requesting anything. It should show the CUPS (the supply point identifier), the distributor or network operator, your contracted power and the retailer’s contact details.
- Copy the CUPS exactly. A single incorrect character can send a CAU or contract request to the wrong supply point.
- Record the distributor name and portal. The distributor controls the connection; its customer portal or technical channel is where access requests and measurement information may be handled.
- Keep the bill for the installer and town hall. The CUPS is used in the Balearic CAU request and in regional filings.
- Check whether the installation will be individual or collective. A single detached house normally uses individual self-consumption. Shared systems in a community or group of buildings require the collective option to be identified in the CAU process.
Do not assume that every property in Mallorca uses the same operator. Use the distributor printed on your bill and follow that operator’s current channel. E-Distribución publishes its own self-consumption procedures and modality information, but its instructions apply only where it is your distributor.
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Which self-consumption modality should I choose?
The modality determines whether energy can flow to the grid, whether an access-and-connection permit is normally needed, how the meter is configured and what contract you need with the retailer. Agree it with the installer before the technical design is final.
| Modality | What happens to surplus | Typical administrative route | Contract implication |
|---|---|---|---|
| No surplus | A certified anti-export system prevents electricity from being injected into the network. | Generation installations in this modality generally do not need an access-and-connection permit, although they still require design, certification and registration. | No surplus-compensation contract; the supply and access arrangements still have to be updated as required. |
| Surplus, eligible for simplified compensation | Unused generation is exported and settled by the retailer under the Spanish framework. | Systems below 15 kW on urbanised land generally do not need an access-and-connection permit. The installer must confirm the land classification and current Balearic requirements. | The retailer may require a surplus-compensation contract and proof that regional documents were filed. |
| Other surplus arrangements | Surplus is sold or handled under an arrangement outside simplified compensation. | Larger or otherwise ineligible systems may require the distributor’s access-and-connection process, network studies and additional measurement arrangements. | Expect additional distributor and retailer contracts; the commercial terms come from the retailer. |
The exemption for no-surplus systems and for surplus systems below 15 kW on urbanised land is described by IDAE’s guidance on permits and execution. “Below 15 kW” is not a universal exemption for every site: a rural or non-urbanised parcel, a different connection point or required network works can change the route.
How do I choose an installer and a compliant design?
Use an installer authorised to carry out the electrical work and the applicable registration. Ask for a written scope that covers engineering, permissions, commissioning, regional filing, distributor communication and contract support—not just panel mounting.
The design file normally includes:
- Panel and inverter models, ratings and data sheets.
- A single-line diagram showing the generator, protection devices, isolation points, meter and connection point.
- Protection settings, earthing details and anti-islanding or anti-export controls where applicable.
- Evidence that the inverter and protection equipment meet the applicable Spanish and distributor requirements.
- Predicted operating configuration, including whether export is enabled and how surplus is measured.
A grid-tied solar inverter must be approved by the installer for the chosen modality and accepted under the distributor’s technical rules. A product listing or a generic datasheet is not proof that the model, firmware and protection settings are acceptable at your particular connection point.
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How do I obtain the CAU or an access-and-connection case?
The CAU (self-consumption identification code) ties the generation installation to the consumption supply. The Balearic Government’s pre-tramitación guidance asks for the CUPS, the selected modality and whether the arrangement is individual or collective.
- Give the installer a current bill and confirm the CUPS and distributor.
- State the modality in writing: no surplus, surplus with simplified compensation, or another surplus arrangement.
- Confirm whether the site is urbanised land and whether the system falls below 15 kW. Keep evidence of the classification; do not rely on an informal description of the parcel.
- Ask the installer which channel applies. For some small systems the CAU is obtained before regional registration; for other systems it is issued during the distributor’s access-and-connection procedure.
- Save the CAU, case number and every submission receipt. You will need them if the retailer or regional office asks for proof.
If the system is outside the exemption, the distributor may require an access-and-connection application, a network assessment, technical studies or works before construction. The installer should tell you whether construction can begin under the applicable route and which approvals must be in place first.
What does the Mallorca and Balearic administrative workflow include?
The Balearic workflow is more than a single online form. The regional map covers prior information, access and connection where applicable, urban-planning licensing, measurement, final regional processing, registration, changes to the access contract, changes to the supply contract and surplus-compensation communication.
1. Town-hall planning permission or communication
Ask the municipality where the property is located whether the roof or ground installation requires a works licence, a prior communication, heritage consent or another planning document. Requirements can vary between municipalities and can be affected by protected buildings, visible roof equipment, rural land and structural alterations. Keep the licence or communication receipt for the regional file.
2. Regional filing and registration
Your installer submits the electrical documentation through the Balearic process applicable to the system. The final package depends on power, connection point and modality. Obtain the filing reference and later registration evidence; a quotation or an invoice is not a substitute for proof of filing.
3. Measurement configuration
The meter must distinguish consumption and generation or export according to the selected arrangement. After legalisation, follow the distributor’s instructions to verify the measurement configuration before the system is connected to the network. E-Distribución specifically instructs applicants to check measurement after legalisation and before connection. A home energy monitor or AC clamp meter can help you observe production and consumption, but it is not a legal or certified replacement for the distributor’s meter.
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What documents should I prepare?
Create a digital folder and a paper copy. The exact list can expand for larger systems, shared installations or network works, but these are the core records:
- Recent electricity bill showing the CUPS and distributor.
- System design, panel and inverter data sheets, protection information and the single-line diagram.
- Installation certificate signed and sealed by the authorised installer.
- CAU or access-and-connection case details, when required.
- Municipal communication, works licence or other planning document, if required.
- Balearic regional filing and registration evidence.
- Commissioning records, protection settings and equipment declarations.
- Surplus-compensation contract, if that modality is selected.
- Photographs or as-built information requested by the installer, distributor or town hall.
Check that the address, CUPS, owner name, installed power and inverter model are identical across every document. Mismatches are a common reason for a file to be returned for correction.
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The installer completes the electrical work, verifies earthing and protection, configures the inverter and issues the installation certificate. Do not treat the panels producing voltage as evidence that the grid connection is complete. The system still needs the applicable registration, measurement confirmation and contract updates.
For a no-surplus system, the anti-export control must be commissioned and documented. For an exporting system, the inverter and meter settings must match the approved modality. Ask for the final single-line diagram and the actual equipment serial numbers, not only the preliminary quotation.
How are the access and electricity contracts changed?
Once the regional documentation is transmitted, the distributor communicates the effective self-consumption date to the retailer. The Balearic Government explains that consumers with an existing access contract must modify it to incorporate self-consumption: “Los consumidores que dispongan de un contrato de acceso para sus instalaciones de consumo tendrán que modificar el contrato de acceso para incorporar la modalidad de suministro con autoconsumo.”
The retailer may ask for proof that the regional documents were filed, the installation certificate and, where relevant, a surplus-compensation contract. Check the retailer’s offer for the compensation price, settlement method, any credit limit, contract duration and termination terms. A retailer’s promise to “buy your surplus” does not authorise export until the distributor and meter are ready.
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Use the Balearic Government’s contract-modification guidance as a checklist, then confirm the current requirements directly with your distributor and retailer.
What is different for each connection route?
No surplus: the simplest export-control route
The inverter and control equipment prevent electricity from entering the network. IDAE says generation installations in this modality do not need an access-and-connection permit, but they still need compliant design, certification and registration. This route can suit a property that wants to maximise on-site use without entering a surplus-compensation contract. It does not eliminate planning, electrical-safety or meter obligations.
Surplus below 15 kW on urbanised land
IDAE generally exempts this category from an access-and-connection permit. The installer must still verify that the land is legally urbanised, that the connection point qualifies and that the Balearic filing route is current. You need a meter and contract configuration that records export, plus a retailer agreement if you want simplified compensation.
Other surplus systems
A larger system, a non-urbanised site or a connection requiring network reinforcement can move into the full distributor process. Expect more technical information, possible network works, measurement arrangements and separate contracts. Simplified compensation is a retailer settlement mechanism; it is not a replacement for distributor approval.
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There is no reliable Mallorca-wide fee or timetable. Costs and review times depend on the municipality, system size, land classification, the distributor’s workload, whether network works are needed and the retailer’s contract. Request an itemised installer proposal that separates equipment, labour, engineering, municipal charges, regional filing, distributor charges and any network works.
Ask who pays if the distributor requires a design change, a new protection device or reinforcement. Also confirm whether the installer will correct rejected documents, attend a meter appointment and remain responsible for commissioning after the regional registration.
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What can go wrong, and how do I fix it?
- Wrong distributor or CUPS: compare the bill with the installer’s application and ask the distributor to correct the case before submitting more documents.
- Modality selected too late: stop construction changes until the installer confirms whether export is enabled, because the inverter controls, meter and contracts may differ.
- Assuming 15 kW always means exemption: verify urbanised-land status and the connection point; request the distributor’s written route where uncertain.
- Municipal filing omitted: contact the town hall before mounting equipment, especially for protected buildings, visible roof work or rural parcels.
- Document mismatch: make the address, owner, CUPS, installed power and equipment model consistent across the certificate, diagram and regional forms.
- Meter shows no export or incorrect readings: do not connect or rely on compensation estimates; ask the distributor to verify the measurement configuration.
- Retailer refuses compensation: request the precise missing document and check whether the chosen system is actually eligible for simplified compensation.
- Installer proposes energising early: insist on the certificate, registration evidence and measurement confirmation before parallel operation with the grid.
What should I put in the installer’s contract?
Specify the self-consumption modality, planned installed power, inverter model, anti-islanding or anti-export equipment, documentation to be delivered, municipal and regional filing responsibilities, distributor communications, meter work, contract assistance, warranty and after-sales response. Include a handover list covering the certificate, final diagram, serial numbers, protection settings, CAU, registration evidence and commissioning record.
For a construction project, coordinate roof penetrations, waterproofing, structural loading, cable routes, fire access and future maintenance with the builder before the panels arrive. Electrical legalisation does not by itself approve structural or planning work.
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Can I connect the system myself after installation?
No. A homeowner should not bypass the distributor’s meter, alter protection settings or parallel an uncertified inverter with the public network. The installer and distributor procedures exist to protect workers, the property and the wider network. Keep the system isolated until the authorised installer confirms commissioning and the distributor’s measurement requirements are satisfied.
Frequently asked questions
Frequently Asked Questions
Can I receive payment for surplus solar power in Mallorca?
Possibly, if the installation and consumer meet the Spanish simplified-compensation conditions and the retailer offers a corresponding contract. The amount, settlement rules and any credit limit are commercial terms, so read the current retailer contract rather than assuming exported kilowatt-hours will be paid at the same price as electricity you buy.
Do I need a battery to connect solar panels to the grid?
No. A battery is an optional design choice, not a general prerequisite for grid connection. The installer must still configure export control, protection and metering for the selected modality, whether the system has storage or not.
What is the difference between a CAU and a CUPS?
The CUPS identifies the existing electricity supply point shown on your bill. The CAU identifies the self-consumption installation and links it to that supply; the Balearic request uses the CUPS, modality and individual-or-collective status to establish the correct record.
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Yes, collective self-consumption is a recognised route, but it must be declared as collective in the CAU and technical paperwork. The allocation of generation, agreements between participants and metering configuration need to be designed and documented before filing.
What should I do if my town hall and distributor give different instructions?
Ask the installer to identify which requirement belongs to planning, which belongs to electrical legalisation and which belongs to the network connection. Obtain the latest written form or portal instruction from each authority, keep submission receipts and do not energise the system while the conflict is unresolved.
