The interconnected photovoltaic system

Interconnected PV generation inverts the variable-frequency DC generated by solar cells into the specified AC sine wave, and can be connected in time to the grid or by directly feeding the AC load.

Interconnected photovoltaic systems have high requirements for the inverter, as the stand-alone inverter must have maximum detection power, island detection technology, low voltage and a variety of protections. Compared to standalone systems, interconnected power generation systems do not have batteries saving cost and standard maintenance work and the combination with the smart grid will help with the large amount of energy at peak hours.

By installing Photovoltaics on your roof you ensure income for 25 years while helping to reduce carbon dioxide emissions into the atmosphere.

  1. What is net metering?

Energy offset means the offsetting of the energy injected into the Grid from a production station with the absorbed energy in the consumption facility of the autoproducer. It concerns a production station which is installed in the same or adjacent space with the consumption installation, which is connected to the distribution network through the same supply. In energy offset, the energy produced does not have to be synchronized with the energy consumed.

The terms and conditions for the development of production stations with energy offset were initially determined by ΥΑ ΑΠΕΗΛ / Α / Φ1 / οικ.24461 (Government Gazette Β '3583 / 31.12.2014), which was subsequently abolished and replaced by ΥΑ ΑΠΕΗΛ / Α / Φ1 /οικ.175067 (Government Gazette Β '1547 / 5.5.2017), which was recently abolished and replaced by ΥΑ No. YPEN / DAPEEK / 15084/382 (Government Gazette B '759 / 5.3.2019).

  1. At what power limits is the development of power plants by energy offset generators in the Interconnected System applied?

In the Interconnected System (mainland and islands connected to it):

a) The power of each power plant can be up to 20 kW or up to 50% of the agreed power of the consumption plant (in kVA), if the last size exceeds 20 kW.

b) Especially for self-generating MTs as well as for self-generating stations regardless of the tendency of connection by legal entities of public or private law pursuing public or other public interest purposes, general or local scope, the power of each generating station can be up to 100% of the agreed power consumption.

c) In any case, the maximum power of a production station (except for small wind turbines) can not exceed the limit of 1 MW, regardless of its composition. Especially for small wind turbine production stations or stations of two technologies, one of which is the small wind turbines, the total installed power of the small wind turbines can not exceed the maximum of 60 kW.

The above energy offset stations are exempted from the obligation to obtain a production license. It is noted that with the completion of the first phase of interconnection of the Cyclades, the islands belonging to the systems of Syros, Paros and Mykonos now belong to the Interconnected System and therefore apply to these above limits for the installation of production stations.

Especially in the saturated network of Peloponnese (downstream of KYT Koumoundourou1) as well as in the saturated network of Evia (area south of Aliveri including the islands of Andros and Tinos), the above limits apply, until the exhaustion of the total margins of power 30 MW 10 M respectively given by Law 4546/2018 (Government Gazette A '101 / 12.06.2018) for stations with energy or virtual energy offset and for stations of E.Coin ..

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