Solar panels in Barcelona: photovoltaic installation

We handle the whole process, together with Project Difusión: the survey and initial design, fitting the structure and panels, connecting the inverter and protection devices, commissioning and after-sales service. We also offer preventive and corrective maintenance contracts for homes and businesses.

Photovoltaic panels produce electricity from sunlight and are used for self-consumption. Solar thermal panels heat water with the sun's heat, mainly for domestic hot water and to support heating. Thermodynamic panels work like a heat pump and also produce hot water, not electricity, even under cloud.

It depends on the system size and number of panels, the type of roof and mounting structure, the inverter, whether you add batteries and the paperwork for the self-consumption mode. That is why we do not give a fixed price without knowing your consumption and your roof: we prepare a tailored, no-obligation quote.

Yes. We offer preventive and corrective maintenance and after-sales service, with tailored maintenance contracts for residential and commercial clients. The aim is for the installation to stay efficient throughout its working life: cleaning the panels when needed, checking the inverter, the connections and the structure, and monitoring production.

It is usually a good combination, because a heat pump is one of the appliances that use the most electricity in a home and the panels can cover part of that consumption in daylight hours. How worthwhile it is depends on the heat pump's use during those hours, the size of the installation and how the home is used, so it is best assessed case by case.

It depends on the current calls for applications and the municipality. Check national programmes with IDAE, calls in Catalonia with the Catalan Energy Institute (ICAEN) and your town council, as some reduce property tax (IBI) or building works tax (ICIO) for self-consumption installations. We do not publish amounts because they change with every call.

There are three options. With export and compensation, the surplus goes to the grid and is credited on your bill. With batteries, it is stored for use at night. And with a zero-export set-up, an export-limiting device stops it from going out to the grid. The best option depends on when you use your electricity.

No. A grid-connected installation works without batteries: what you produce is used straight away and any surplus goes to the grid. Batteries make sense when a large share of your consumption is at night or when you want to use more of your own energy, but they add to the investment, so they are worth assessing with your figures.

Yes, although they produce less. Photovoltaic panels generate electricity from light, not heat, so they also work under cloud, with lower output. At night they do not produce anything: during those hours the building draws energy from the grid or from its batteries, if it has them.

Yes, through collective self-consumption: the installation goes on the building's roof and the energy is shared among the residents who take part. It needs the agreement of the residents' association and a survey of the shared roof. In a detached house, by contrast, the installation goes directly on the home's own roof.

Yes. In the commercial and industrial sector we install photovoltaic systems that make better use of energy and cut operating costs. Many businesses use most of their energy during the day, when the panels are producing, which means more of the energy generated is put to use. For companies we also offer specialised maintenance contracts.

Photovoltaic panels have a long working life, measured in decades, and manufacturers usually guarantee their output for many years. The inverter is the component most likely to be replaced first over the life of the installation. Regular maintenance helps keep production up and spot any fault in time.