The connection to a network of photovoltaic stations of businesses is facilitated

Connection to low voltage up to 250 Kv, the connection to the roof photovoltaics is completed in 2 weeks.

The Greek Electricity Distribution Network Operator (DEDDIE) now allows businesses to operate photovoltaic systems without injecting energy into the grid. This is a first, and systems up to 250 kW can now be connected to the low voltage grid at a lower cost for businesses. In addition, the connection process for photovoltaic systems on rooftops will be simplified and will be completed within two weeks. These changes are part of new guidelines from DEDDIE, which were presented by today. Specifically, the guidelines provide the possibility for systems up to 250 kW (currently the limit is 100 kW) to be connected to the low voltage grid instead of the medium voltage grid, thereby reducing the associated cost.

In addition, the connection process for photovoltaic systems installed by businesses in a regulated network is simplified. According to the Manager, systems up to 250 kW will be able to connect within two weeks, compared to the previous time frame of several months. These changes are expected to significantly increase the adoption of photovoltaic systems by businesses in Greece.

How to..

To avoid excess energy being fed into the system, the station receives a command from the sensor to decrease or stop production when there is excess energy being produced or less load due to increased production or reduced demand. Equal solutions can be accepted if they demonstrate and ensure that no energy is fed into the network from the installation.

The zero feed-in system allows the connection of a production station to a licensed network, provided that the license is due to the exceeding of the nominal power of the network elements or the exceeding of the desired voltage limits at network nodes. In the case where the network is licensed due to the exceeding of the short circuit level at the medium voltage neutral point, the implementation of zero feed-in is not possible. However, other solutions can be implemented to prevent excess energy from being fed into the network.

The process of self-consumption

A company that is interested in installing a station in an area with a congested electricity network and operating it only for its own needs, without feeding energy into the network, is obliged to submit to the DEDDIE a technical description from which compliance will arise. It must also submit an electrical plan and technical manuals of the manufacturer for the production station and the "control sensor". The obligation of not feeding energy into the network will be set as a special term in the connection offer and in the connection agreement with the administrator.

As far as residential photovoltaic stations are concerned, with an energy proposal, valid up to 50 kW (kilowatt) and other stations up to 20 kW (with or without a storage system), the process is simplified and the interested party simply informs the DEDDIE of its intention to connect the station through a request. The DEDDIE will issue a relevant decision, after checking the technical and operational viability of the connection and the non-interference of the station with the network.