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From the best services in Portugal to savings for everyone
Portugal has one of the highest sunshine hours in Europe, with an average of 2,200 to 3,000 hours per year, a figure much higher than most member states. The Portuguese can and should make full use of this energy potential, both for reasons of environmental sustainability and economic savings.
In this article, we explain the benefits of Personal photovoltaic use that is, producing electricity for own use by installing solar panels, not only can you reduce your environmental footprint by consuming green energy, but you can also reduce your electricity bills at the end of the month.
How do solar panels work?
Solar panels, or technically, photovoltaic systems, capture solar radiation through photovoltaic cells. This sunlight is then converted into electricity that can be used immediately by electrical devices that consume energy.
If power generation is greater than current consumption, the energy can be stored in batteries or injected directly into the grid.
What should we pay attention to when installing photovoltaic power?
During its lifespan of about 25 years, the entire photovoltaic installation must undergo regular maintenance once or twice a year to ensure better power generation performance. Given the locations where they are usually installed, such as building roofs, it is recommended that maintenance be performed by professionals who follow all safety measures. The process includes electrical inspections of all equipment, cleaning of panels with water and non-corrosive detergents, and trimming of vegetation that may cause shadows.
Am I at risk of generating too much energy? How can I ensure I generate enough energy to meet my household needs?
Individual energy producers for their own use may face two situations:
- The solar installation produces less energy than is currently consumed: when this happens, it is necessary to purchase electricity from the public grid through one of the energy suppliers to cover the remaining consumption;
- Solar installations produce more energy than they consume at any given time: when this happens, the excess energy can be stored in batteries or injected directly into the public grid.
How do solar cells work?
Solar cells are devices that accumulate surplus energy through solar panels. This energy can be used in periods without solar radiation and even when grid energy is more expensive. This feature guarantees you, as an energy producer and consumer, independence from the grid, which will significantly save you money on your electricity bills. However, depending on your production/consumption ratio and the necessary initial investments, this option can only turn into a profitable solution in the medium and long term.
How is surplus energy sold?
If you do not intend to invest in batteries, you can sell your surplus production by signing a purchase and sales contract with a company in the energy industry. This closes the loop and ensures that all energy generated but not consumed is not wasted. You can also get additional savings on your monthly bills, where the value of the surplus sold will reduce your investment payback time.
Is there any energy generated on cloudy days?
Since production is done through solar radiation, the panels can continue to produce even on cloudy or rainy days, although at a reduced efficiency compared to the maximum output of the installation.
What if the lights go out?
When the grid goes out, solar cells can serve as a source of electricity and provide energy so that essential appliances such as refrigerators continue to operate. To achieve this, the photovoltaic system also needs to be technically prepared and configured for this purpose.
How do I track my energy consumption and production?
Typically, a photovoltaic installation includes its own monitoring system that allows real-time readings of its consumption and photovoltaic power generation. This way you can access all this information via the web or an app, allowing you to manage your consumption in the best possible way. Matchup Production.
How can I start selling my surplus products?
There are some simple steps to follow:
- Installing photovoltaic solar systems;
- Legalize your solar installation through the DGEG (Directorate General of Energy and Geology) and ensure it is connected to the RESP (Public Service Grid);
- Make sure you have a bidirectional meter parameterized by the ORD (Distribution Network Operator);
- Open financial activities under the Code of Economic Activity (CAE) 35113;
- Sign purchase and sales contracts with companies in the energy industry and you can choose to be paid at a fixed rate or an indexed rate.
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