Solar panels in San Javier: what foreign homeowners need to know

Council tax discounts in San Javier

Spanish councils may reduce two taxes for solar self-consumption: the IBI (Impuesto sobre Bienes Inmuebles, the annual property tax, by up to 50% under national law) and the ICIO (Impuesto sobre Construcciones, Instalaciones y Obras, paid once on the works, by up to 95%). Both are optional for each council, which is why the figures differ from town to town. Our comparison of 21 cities (in Spanish) shows how widely they vary.

IBI: 50% of the IBI quota, for the first tax period only

• Article 11, point 7 of the IBI ordinance gives a 50% bonus on the IBI quota for properties intended as dwellings with solar thermal or electric systems for self-consumption. It applies only in the first tax period after the installation.
• Documents: a technical project or memory and a certificate signed by a competent technician and endorsed by the professional association stating that the installation is not compulsory under current rules, plus proof that the municipal works licence was requested and granted. No bonus where the system was compulsory under building rules.

ICIO: 50% on the solar part

• Article 7, point 5 of the ICIO ordinance (approved 19 December 2024) gives a 50% bonus to works that incorporate solar thermal or electric systems for self-consumption, only for the part that directly affects the building and where the system is not compulsory.
• The ICIO is paid once, with the licence or declaration for the works, so this bonus is worth claiming at the start.

How much a system produces in San Javier

PVGIS, the free tool of the European Commission’s Joint Research Centre, gives 1,661 kWh per year for each kWp installed at San Javier town (37.806, -0.843), with panels facing south at the optimal tilt (35°), 14% system losses and 2125 kWh/m² of yearly irradiation on the panels. A 5 kWp system would therefore produce roughly 8,305 kWh a year. A roof that does not face south, or that is shaded, will produce less: your installer should model your actual roof.

Source: PVGIS v5.2 (JRC, European Commission), consulted 3 October 2026, coordinates 37.8064, -0.8428, elevation 28 m. Use the calculator to turn this into euros with your own tariff.

Licence and paperwork in San Javier

The IBI bonus requires proof that a municipal licence was requested and granted. Ask your installer to put the licence reference in the file they hand you.

The steps that are the same everywhere in Spain (registering the installation, the surplus-energy contract, what changes on your bill) are explained in our guide to solar panels in Spain for foreign homeowners.

Particularities for San Javier

San Javier and Los Alcázares sit on either side of the Mar Menor and are often searched together. Their rules differ: San Javier’s IBI bonus lasts one year; Los Alcázares announced three (see that page).

Santiago de la Ribera, Roda, Pozo Aledo and the municipal stretch of La Manga are inside the municipality and follow the same ordinances.

Frequently asked questions

Sources

• IBI ordinance of San Javier (council website, signed 27-1-2026), article 11.7
• BORM no. 300, 28-12-2024, announcement 6622: new ICIO ordinance of San Javier (article 7.5)

All consulted on 2–3 October 2026. PVGIS: re.jrc.ec.europa.eu. Ordinances change, usually in the autumn for the following year: confirm the figure with the council before you sign.

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