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Photovoltaic
Grid-connected systems

Description

Photovoltaic solar panels can be used to generate electricity, and also to generate it during the day when it is in peak demand. Historically, this energy was used in places with no access to the grid, mainly homes in the country, booster stations, mountain shelters, etc.

Since the regulations governing the technical and financial terms for selling this electricity to the distribution companies came into force, photovoltaic facilities can be connected to the national grid, thus providing great benefits for both distribution companies and society as a whole.

The first prerequisite of a facility is to ensure it is economically viable and can provide a return on investment for its owner, be it a company or individual.

The first advantage for the owner is the excellent profits made by selling the energy generated to the national grid. This return on investment is possible thanks to both the quality and useful life of the materials used, and the tariffs guaranteed by the regulations governing energy sales from the day the facility is commissioned to the day it is dismantled (>40 years).

There are great benefits for society too: clean, sustainable production which is not affected by fluctuating fuel supplies, small losses from transport (production close to place of consumption), elimination or resizing of electrical networks, energy feed-in at peak demand times avoiding oversized conventional production plants, etc.

Features

The main features of a grid-connected solar farm are its operating ease, low maintenance costs and long lifespan.
There are three main components in this type of facility:


- Photovoltaic solar panels consisting of aluminium frame, non-reflective glass, cells featuring a variety of technologies (monocrystalline, polycrystalline, thin films, etc) and a Tedlar backsheet for attaching the cells to the glass. Solar panels deteriorate over time. They have a useful life of over 40 years. Most manufacturers guarantee that during the first 20 years, at the most, panel performance may drop by 20%, i.e. 0.8% per year.

- Converters/Inverters. Their main function is to convert the DC electricity from solar panels into AC, synchronise it with the conventional grid and feed it in via a meter. They are fitted with systems to monitor the panels’ peak output and maximise the electricity they are able to generate at all times. They also have built-in safety systems to protect both people and the national grid.


- Module mount. This is usually made of aluminium and attaches the panels to the roofs of houses or industrial premises and faces the modules south as far as is possible. Its quality and durability is largely responsible for zero maintenance in the future.

Faq´s

F.A.Q. If your question isn’t answered here, don’t hesitate to contact us.


What is photovoltaic (PV) solar energy?

The generation of DC electricity by photovoltaic solar panels.


What does a grid-connected PV facility consist of?

It consists of generating electricity for subsequent sale to electricity companies.


What are the elements in a grid-connected facility?

Three basically: solar panels, an inverter and meters.


What surface area must a grid-connected module have?

Between 10 and 40 sq.m.


How much does it produce?

40 sq.m. of panels generates approximately 8000 kWh per year in areas with solar radiation levels similar to those in Valencia.


Can I use the electricity produced by the facility?

Not in the case of a grid-connected facility since additional items – such as batteries, regulators, etc – are necessary for one’s own consumption. In any case, this is not allowed under current legislation. All the energy produced must be sold.



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