Today, photovoltaic systems offer an attractive solution for an ever-increasing number of applications demanding a low cost and reliable energy source, even under extremely difficult environmental conditions. Using this technology, we can produce electric power without consuming conventional fuel, taking advantage of the solar energy which is in abundance and free.
The main advantages of PV systems are the autonomous operation, the lack of need for fuel, their high durability and reliability. Their capability of operating for a long time with no maintenance makes them a cost-effective solution for every type of application, even for installations that are not connected to the power grid.
Autonomous System:
An autonomous PV system makes use of solar energy, offering energy autonomy to installations that are not connected to the power grid. There are many different categories of isolated systems. Some of them are:
In net-billing (simultaneous offsetting), the offsetting between produced and consumed energy occurs in real-time. It is an economic offsetting. Any surplus energy is injected into the grid and compensated for twenty years based on the wholesale market price at the time of injection (measured every 15 minutes).
It applies to all categories of consumers. It opens new horizons and is also aimed at those with different needs than those offered by net metering.
In net billing, the consumption supply is located in the same or adjacent space as the production station, or it is located in another space but is electrically connected with an exclusive interconnection line.
In virtual net-billing (virtual simultaneous offsetting), the consumption installations for offsetting are not electrically connected to the internal electrical installation of the station. They can be installed in any region of the country, regardless of the location of the consumption installations for offsetting, provided that both the station and the consumption installations are in the same electrical system. The same station can be matched with one or more consumption supplies that are not necessarily in the same or adjacent space, provided they belong to the same self-consumer. The production station can be matched with one or more consumption supplies that do not belong to the same self-consumer, in cases where these consumption supplies are in a space owned by a third party who installs the production station.
In collective self-consumption at the building level with the application of virtual net-billing, at least two self-consumers in the same building can jointly participate in activities and regulate the distribution of the energy produced by their stations among themselves. In virtual simultaneous offsetting, under the scheme of collective self-consumption, common area consumptions in buildings can also be included.
Fluctuations in energy prices affect the calculation of the payback period, resulting in the need to estimate the future course of energy prices. However, a fairly safe prediction is that the payback period of a system will be six years or less. The duration of the net billing license is 20 years. From January 1, 2024, a measure to support small household self-consumption systems with or without batteries will be in effect. If you do not participate in a subsidy program, you can benefit from tax deductions for expenses incurred for the purchase of goods and services related to the energy, functional, and aesthetic upgrade of buildings.
At the same time, businesses continue to receive subsidies in the form of tax benefits that can reach up to 45% of the value of the photovoltaic system. Specifically, expenses related to Energy Efficiency Improvement Actions, energy savings (produced and consumed), green transition, and renewable energy sources, including research and the preparation of related studies, are fully deductible in the tax year they are incurred, as they are also deducted off-balance sheet.
In self-consumption without energy injection (zero feed-in), the offsetting of the energy produced by the production station and the absorbed electrical energy at the final consumer's consumption supply is achieved without injecting energy from the production station into the Grid or System. The advantage of connecting the photovoltaic system with zero feed-in is the priority given to the licensing request.
Net Metering:
Net Metering is the offsetting of produced and consumed energy.
Net Metering allows the consumer to cover a significant part of the energy they consume while at the same time enabling them to use the network for indirect storage of the green energy produced by their photovoltaic system.
The term “net” arises from the difference between the consumed and the produced energy over a period of time. This period is usually each cycle at the end of which the energy consumed is counted and priced.
If a consumer’s PV system produces more energy than they consume , this amount of energy is not lost. It remains for a certain period of time until the final settlement is made. According to the latest ministerial decision, this period is set at 12 months.
The advantages of this solution are:
Energy Communities
Energy communities are local urban cooperatives for the exclusive purpose of allowing citizens (either as individuals or as legal entities) to operate in the energy sector utilizing clean energy sources. The new institutional framework ensures favorable conditions for the establishment and operation of energy communities. The objective is to add to the income of individuals and families , to encourage local entrepreneurship, solidarity economy and to promote energy democracy, i.e. the active participation of citizens, local government and small and medium-sized enterprises in energy production; a sector which is hitherto limited to only a few large 'players'. Whether for environmental protection reasons and climate change, or because RES are more economically viable, the energy transition to an economy without fossil fuels has already begun and this trend is irreversible.
The Energy Communities address: