In 2015, all member countries of the United Nations adopted the 2030 Agenda for Sustainable Development with 17 goals that contribute to peace and prosperity for people and the planet.
Goal number 7 - Clean and Affordable Energy - ensures a focus on access to reliable, sustainable and modern energy sources for all people.
Helexia, through investments in energy transition projects, has contributed to more companies decarbonizing and becoming more competitive by reducing their energy bills, leading the economy towards a more sustainable development.
Helexia projects that use renewable energy and energy efficiency technologies have multiple positive impacts on the environment and people, by reducing greenhouse gas (GHG) emissions, and consequently improving public health by improving air quality.
These projects are typically installed in industrial or urban areas, without impacts on the natural landscape or biodiversity, minimizing the impacts of these technologies on people's lives and their relationships with places.
The indicators used by Helexia in the communication of energy transition projects serve the purpose of informing our stakeholders about the technical, economic and environmental contributions of each project, whether photovoltaic or energy saving.
Taking into account the diversity of our stakeholders, we work, in addition to technical indicators, environmental indicators, with a more informal character, and which can be interpreted more easily by an audience without educational or professional knowledge in the areas of environment, energy, forestry and others.
In order to make the information regarding the Helexia indicators for the energy transition projects in which we invest clear and transparent, we disclose the methodology and calculations used.
Total Installed Photovoltaic Plant Power (kWp)
The power of the installed photovoltaic plant is presented in kilowatt-peak (kWp). This indicator is related to the total power of the set of installed photovoltaic panels that make up the plant. If a PV plant has a set of 3000 panels installed with a power of 330 watts each, the total power of the plant will be 990kWp.
E.g.: Total Power = No. of panels installed X Power (W) of each panel
Estimated Annual Production of the Photovoltaic Plant (MWh)
The annual energy production by a photovoltaic plant is presented in megawatt-hours (MWh).
This indicator is related to the total power of the plant (kWp) and to the Yield - a performance measure based on different factors such as:
Average annual solar irradiation over the last 10 years
Geographical area of the solar plant
Tilt and orientation of the solar panels
Characteristics of the solar panels and other equipment of the photovoltaic plant
E.g.: Annual Energy Production = Yield X Power Plant Power (kWp)
CO2 avoided
The carbon dioxide (CO2) avoided in Helexia's solar projects is calculated through the production of clean energy by a solar PV plant. Thus, when a plant produces solar energy and this electricity is consumed in a building, it means that this building will not use other sources of energy, such as those from fossil fuels, which emit harmful greenhouse gases (GHG) into the atmosphere, including CO2. As described in Order 17313/2008, it is considered that for each kWh of electricity consumed, 0.47 kg of CO2 is emitted.
E.g. CO2 avoided = Energy production (kWh) X 0.47
Units of Trees Planted (Equivalent)
Planting trees in our forests has a very positive impact on the environment by contributing to biodiversity, oxygen production and carbon capture. Trees naturally absorb considerable amounts of carbon dioxide throughout their lives. According to a study by the U.S. Department of Energy (1998) cited by the United States Environmental Protection Agency, an average coniferous tree, 10 years old, in an urban area subject to specific conditions of sowing, planting and transplanting, absorbs about 39Kg of carbon. In our calculation, we divide the tons of CO2 avoided in a photovoltaic project by the average amount of carbon captured by a tree (39Kg) to find the equivalent number of trees planted.
E.g.: Unit of trees planted = CO2 avoided / 39
Annual energy consumption by X households (equivalent)
We calculated the energy consumption per household based on the average annual electricity consumption per household in France in 2018 (≈ 5350 kWh/year). By default, and given the fluctuation of energy consumption annually, we stipulate as average consumption per household 5000 kWh/year. Electricity consumption in the domestic sector in France is higher than in Portugal (≈ 3300 kWh/year) and the average consumption in the European Union (≈ 3700 kWh/year).
By monitoring the annual energy production of Helexia's photovoltaic plants, we have been able to identify the equivalent number of households that could benefit from the clean, renewable energy produced by our plants in their homes. In projects such as the Montalva/Izidoro Group, the clean energy produced annually by the installed photovoltaic plants has the potential to supply electricity to entire parishes with about 3000 inhabitants, such as Castro Marim, Sobral de Monte Agraço or Benfica do Ribatejo, for example (AEDRL, 2013).
Eg: Annual energy consumption by X households = Annual energy production (kWh) / 5000
Glossary
CO2 - carbon dioxide
GHG - greenhouse gases
MWh | kWh - megawatt-hour | kilowatt-hour - unit of energy
MWp | kWp - megawatt-peak | kilowatt-peak - maximum installed photovoltaic capacity
W - watt - unit of power
Yield - measure of performance