Self-production in Domestic buildings
AENAOS, having over 20 years of exclusive involvement in the field of Renewable Energy Sources and being equipped with all modern machinery, special equipment and the necessary know-how can ensure a reliable result in your photovoltaic investment, can offer:
- Free pre-study, to diagnose your own, special needs.
- Particularly competitive prices, without discounting the quality of the materials and services offered.
- Important additional services at no extra cost, such as free operation and maintenance of the PV plant for 1 year.
SPECIFICALLY WE TAKE THE FOLLOWING STEPS:
- Analysis of electricity bills and calculation of energy needs.
- Sending an indicative offer.
- Autopsy at the installation site of the photovoltaic plant by engineers for the drawing up of the plant application study.
- Planning the optimal location in order to cover the energy needs and to achieve the maximum possible performance of the system.
- Licensing procedure for the submission and approval of the energy offset request to DEDDIE.
- Signing a connection agreement with DEDDIE
- Photovoltaic system installation
- Activation request to DEDDIE
- Connecting a photovoltaic system to the grid - activating a photovoltaic system
- 1 year operation and maintenance See here some indicative self-production projects in domestic buildings!
See here some indicative self-production projects in domestic buildings
Net-Billing or simultaneous energy netting is the new method of energy netting that concerns both households and businesses.
For households, the maximum power limit is 5kW for single-phase systems and 10.8kW for three-phase systems.
The operating mode of the system is similar to that of Net-Metering with the difference that the injected energy is not offset but compensated at the wholesale market clearing price during the hours it will be injected into the Network.
The equipment required to install a Net-Billing system is no different from that of Net-Metering. The only difference is in the way the investment is priced and amortized.
Differences in Net Metering and Net - Billing
In Net-Metering the injected energy is credited for consumption at the cost we buy it, while in Net-Billing the energy is sold. Energy netting in Net-metering only concerns farmers, vulnerable households and public bodies. Net Billing applies to any legal or natural person. The self-producer utilizes all the energy produced through self-consumption or compensation, while in Net-Metering the injected energy is credited for use up to 3 years. Compensation of injected energy according to current legislation:
- Household consumers with systems up to 10.8kW, the self-producer enters into a contract and will be represented at the Hellenic Energy Exchange (E.X.E.) by DAPEEP, which will compensate them accordingly for their injected energy.
- The self-producer can enter into bilateral contracts for the sale of surplus (PPA). As was the case with Net-Metering,
Net-Billing systems can be installed on a roof, on the ground within the facility, on a neighboring plot or at any point as long as it is electrically connected to the indoor facility.
Clearly storage systems can be combined with Net-Billing systems for better energy utilization.
1.1 DEPRECIATION - RETURNS
Example of amortization of Net billing system by selling the injected energy
The following numbers are indicative and the energy price has been set at the clearing price of each month from July 2023 to June 2024 based on ΕΝΕΧ.
Virtual Net billing otherwise virtual simultaneous netting is the possibility of installing a PV station in any region of the country regardless of where the consumption facilities to be netted are located. None of the benefits to be set off are electrically connected to the internal electrical installation of the generating station.
It is possible that the consumption benefits to be offset are represented by a different supplier.
All the generated energy of the PV plant is fed into the grid and offset in real time with the consumption at the user's premises using smart meters comparing the consumptions of the installation and the production of the PV plant in 15 minute data.
The installations of the self-consumer normally receive energy from the grid.
From the energy drawn from the grid by the self-consumer, the energy simultaneously produced by the photovoltaic station is subtracted.
The remaining cost of the energy drawn from the grid (after deducting the energy simultaneously produced by the photovoltaic station) will be offset against the amount corresponding to the energy sold (offset in €).
The maximum power limit is 200% of the sum of the Benefits to be Offset.
The rapid development of A.P.E. and especially of photovoltaic networks have now become saturated. In practice, the energy produced by photovoltaic plants is high enough that the transmission networks cannot handle it. The solution to energy management is offered by Zero Feed-In. With the Zero Feed-In solution, the energy produced by the photovoltaic system is available exclusively for the installation's consumption without being injected into the network and affecting its limits.
The equipment governing a Zero Feed-In self-generation system is exactly the same as that of Net-Metering with the additional addition of an energy analyzer which blocks the flow of energy to the grid.
3.1 LEGAL FRAMEWORK
The self-consumer can install a generation station without injecting the produced energy into the Network, but for its own consumption, installed power up to 100% of the Agreed Power of the consumption supply.
The zero feed-in scheme makes it possible to connect the generating station to a saturated grid. Even zero feed in can be combined extremely well with battery and orange tariff. The excess current will be stored in the battery, which will be consumed by the owner when the photovoltaic has no production (e.g. at night). When the consumption exceeds the available energy from the photovoltaic and/or from the battery, then the additional current required, will be given by the public network (DEDDIE clock).
3.2 DEPRECIATION - RETURNS Example of system depreciation with zero feed in
Net-Metering is the energy netting of the produced energy of a photovoltaic plant with the consumed energy of a consumption supply.
The production station can be installed either in the same or adjacent space as the consumption installation or in a space remote from the electrical installation as long as it is electrically connected to a dedicated interconnection line which will be part of the internal electrical installation.
The PV system can be installed on a building or on the ground.
During the operation of a PV system, the need for energy from the supply to which the PV system is connected is first covered by the PV, while if this energy is not sufficient to cover the demand, then you absorb energy from the grid. Whereas in the event that the PV system produces more energy than the supply needs at the given moment, this is channeled into the grid in order to offset the energy you absorb from the grid when the PV is not producing.
It is also possible, in a PV Net metering system, to add accumulators where during the day in case of excess energy it is stored in the batteries in order to be used in the evening hours thus reducing the energy you absorb from the network.
A photovoltaic system can be connected exclusively to a single consumption supply, while a supply that has a PV self-production system does not enter into another energy offset.
The calculation of the produced energy and its offsetting with the consumed energy is carried out by the provider in each settlement account, in case of excess energy you transfer it to the next settlement account until the 3rd year. In case of excess energy during the final liquidation, it is "donated" to the network and a new cycle begins.
A Net-Metering system consists exclusively of the photovoltaic frames with those of the support bases, the power converter, the electrical material (i.e. cables, electrical protection panels) as well as the measuring device of the DEDDIE which receives data on the production of the photovoltaic plant.
While in the case of Net metering with storage, accumulators are used with the appropriate management unit.
The following have the right to install a PV system under Net Metering:
with a power of up to thirty (30) kW developed by farmers registered in the Register of Farmers and Agricultural Holdings of Law 3874/2010 (A΄ 151) for facilities of agricultural holdings of Law 3874/2010 and agricultural uses,
by bodies of the General Government, as defined in paragraph b of paragraph 1 of article 14 of Law 4270/2014 (A΄ 143),
citizens living below the poverty line and households affected by energy poverty, according to the decision of the Minister of Environment and Energy No. YPEN/GDE/89335/5599/27.9.2021 (Β΄ 4447), as applies.
Example of depreciation of a 10kW domestic installation
