What is shared PV self-consumption? How can I save on my energy bill?
a. Distributed generation | PV self-consumption
What is shared self-consumption?
The shared self-consumption consists in the generation of energy in a photovoltaic installation which is shared among the users (associate consumers) located in the surroundings. Its philosophy is producing electric energy with renewable origin in order to maximize the self-consumption from a collective perspective where the generated energy is distributed among the participants. Currently, the industrial estates composed for SMEs are betting on this business model because for some constructive and economic reasons cannot face the individual investment in a self-consuming plant.
What is the lifetime of photovoltaic panels?
Although the answer is usually 25 years, proper maintenance and occasional servicing can ensure a service life of up to 35 years. However, we must bear in mind that the useful life is determined by the condition of the photovoltaic cells and their degradation rate, as well as their proper maintenance. In spite of their useful life, after 20 years, their performance will gradually decrease and their maximum power cannot be guaranteed due to cell wear and tear.
How much can I save with solar self-consumption?
Since the first month you will already appreciate the savings in your electricity bill, and you will be able to save between 30% and 50% per year. If you are interested in knowing how much you can save, both energetically and economically, you can do it through our photovoltaic simulator of Wattabit, without commitment and on your own.
The diference between nominal and peak power:
Rated power: power of the inverter. It cannot produce more than its limit, in other words, the amount of direct current power that the inverter can convert into alternating current.
Peak power: the maximum power that, under ideal conditions, the installation can achieve. Its value is given by multiplying the number of panels installed by the unit peak power of each panel. The more panels there are, the more possibilities there are to cover the inverter's power limit.
It is for this reason that at Enertika we design photovoltaic self-consumption projects that cover 100% of the inverter capacity.
Remember that at a legal level the power of the photovoltaic installation is determined by the minimum value between both nominal and peak power.
Do I have electricity if it is cloudy? And if it is hot?
We must immediately deny that when it is cloudy, solar panels do not generate electricity. Obviously, they still work, because the clouds do not prevent the sun's rays from hitting the panels. Obviously, the amount of energy the installation will produce on a cloudy day will be less than what it will produce on a clear day.
As a general rule, cell temperature has a negative influence on photovoltaic production. In other words, the higher the temperature of the panel, the lower the power output at a rate of -0.35% per degree of temperature increase. For industrial and residential panels, the optimum operating temperature is 25ºC.
What happens if I generate more energy than the amount I consume?
The surplus energy generated by your solar panels can be fed back into the electricity distribution grid. According to the Real Decreto, these surpluses will be economically compensated at the end of the month in your electricity bill, as long as the installation is up to 100 kW nominal, since you will be returning to the grid the energy that you do not consume. For installations of more than 100 kW nominal, it is possible to feed energy into the grid and obtain an economic return by selling it on the open market. This formula is a little more complex than simplified compensation, as it requires a rep on the electricity market and registration of the company as an electricity generating company.
There is also the possibility of using an electronic system called anti-discharge, which prevents the energy from being discharged into the grid, limiting photovoltaic production according to consumption.
What is a solar inverter?
The solar inverter is the equipment in charge of converting the direct current generated by the photovoltaic installation into alternating current and adapting it to the user's consumption conditions. Its transformation is essential so it can be fed into the alternating current electrical installation for self-consumption or into the grid.
How do the solar panels work?
The solar photovoltaic cell is the key element in the operation of solar panels. After all, the solar panels are the structure, which is composed of these photovoltaic cells. The process consists in the transformation of sunlight (solar energy) into direct current electricity, which must be transformed by the inverter into alternating current in order to be used.
How do the solar cells work?
Solar cells are thin sheets of usually crystalline silicon doped with other elements such as boron or phosphorus. This composition gives the cells the ability to convert solar energy into electrical energy. When cells are exposed to solar radiation, photons (energy from sunlight) can release electrons from the elements that make up the cell and, thereby create a flow of electrical energy.
Diference between thermal and photovoltaic solar panels:
There are two types of solar panels that take advantage of solar energy and their main difference lies in their purpose.
Thermal solar panels: they are used to obtain domestic hot water through thermal energy.
Photovoltaic solar panels: they absorb solar energy (thanks to their silicon composition) and convert it into electricity.
How much space do I need to install solar panels?
Probably, and without knowing it, you will already have enough space to install photovoltaic panels to cover an important part of your consumption. However, this will depend on the activity of the building and the simultaneity with renewable generation.
Bear in mind that a solar panel measures approximately 2 square meters, and for an average Spanish house, approximately 6 solar panels would be required to achieve a significant coverage of the energy demand.
b. Energy efficiency | Responsible energy
What is energy efficiency?
Energy efficiency is the optimization of the energy demand for the performance of an activity or process, thus achieving the expected energy consumption and obtaining a higher energy yield with less energy.
It has a direct impact on energy costs, providing persistent savings over time. For this it is important to establish a working methodology of continuous improvement.
Energy improvement generates other benefits such as the reduction of greenhouse gas (GHG) emissions.
Why should I become energy efficient?
Reduce operating costs and become more competitive within your industry.
Reduce your environmental impact to achieve the 2030-2050 decarbonization goals.
Optimize facilities for lower consumption.
Continuously improve the comfort of work areas, performance and useful life of facilities.
Why led technology?
LED technology, based on energy efficiency and environmental progress, has everything in its favor: 1) It is the most economical lighting system because it consumes the least energy. 2) It is an environmentally friendly technology and has no toxic components for humans or pollutants for the ecosystem.
What is an energy audit?
An energy audit is the analysis of the different energy consumers to know where, how, how much and when each facility consumes. This information is used to define an energy strategy and detect Energy Saving and Efficiency measures (MAEEs) in the facilities. These audits can be linked to certifications such as ISO 50.001:2018 or regulations such as RD 56/2016.
How can I reduce my energy bill?
Energy efficiency offers you optimization services that contribute to reducing the cost of the bill. To do this, it is necessary to minimize energy losses and reduce energy demand; thus obtaining a greater performance and benefit from the energy consumed.
What can we optimize?
The energy bill: Consumption analysis to optimize the variables associated with the economic cost.
Lighting systems: Improving lighting technology to achieve savings of around 40-60%.
Compressed air system: Using the necessary flow for each process or activity. Improving the generation, distribution, consumption and maintenance system.
Air conditioning system: Controlling the interior temperature for an optimal use of the generation and distribution systems of cold and heat.
Analyze the consumption curve. Know how, how much, when and where you consume energy. It allows you to systematically improve continuously by obtaining data in real time.
Contrast the energy savings achieved through energy efficiency measures.
Detect anomalies automatically, helping you identify unexpected consumption or inefficiencies in your facilities.
Continuously reduce your energy costs by detecting operational savings and investment projects.
Constantly update the current status of your assets and savings achieved thanks to automatic reports.
And a long etcetera. Are you up for it? Discover what we offer you in terms of energy management.
And if you have more questions about responsible energy...
Don't hesitate to contact our team via mail or by filling out our form. Asking questions implies wondering and wondering is already a responsible action. The energy transition is not that difficult as they say. Step up and trust Enertika.
What does the Smart Energy Management hardware does?
Smart Energy Management is our own integrated management system, which, through necessary software, allows real-time monitoring of the consumption associated with the installation. Smart Energy Management collects and sends the data to our GEMS+ team to remotely manage and optimize the consumption.
What is W-Manager?
It is an Energy Management Software as a Service created by Wattabit (a group company). It is a multifunctional energy efficiency web tool with great potential for the control and management of energy consumption.
Visualize your consumptions in the most convenient way.
Enter alarms for anomalies and improve your predictive maintenance.
Automate energy reports Create and compare your own energy bills
Create and visualize your SCADA system for greater control