Our office offers complete solutions to its customers, undertaking the planning, design, the necessary authorization procedures, financing procedures, procurement, installation and technical support of P / V systems. Having years of experience it is an ideal choice for investors with high expectations. The generated-consumed power off (known by the term net-metering) is one of the promotional tools for self-production and self-consumption with RES and it is applied in different countries, particularly for photovoltaic system installations. Since the 8th of May, the applications for self-production of energy were launched (Net Metering).

What is net metering?

The net metering is the offset between the produced and consumed energy, through which the consumer may cover a significant part of their own consumption, while they have the possibility to use the network for indirect storage of green energy. The charge-credit on the difference between the consumed and produced energy, will take place at the end of the count-billing cycle energy consumption and if there is excess energy will not be lost for the consumer, but will be credited for 1 year, when the final clearing takes place.

How does net metering work?

1) The photovoltaic panels convert solar energy and transfer it with the form a continuous electrical current (DC) to the inverter.
2) The inverter changes the direct current (DC) into alternating current (AC)
3) All electricity passes through the meter
4) Then it goes, through the table, to the devices to meet the needs of home electricity
5) If you consume more electricity than you produce then you buy electricity from the grid
6) If you produce more energy than you consume, then it is saved indirectly to the network for a year.

Procedure - Documents for Net Metering

The process for interconnecting a solar net metering system is simple and it is undertaken by our company. The steps are summarized in the diagram on the right. For the filing of net metering in the HEDNO (PPC) the following is briefly required: title deeds of the property (or lease) and written confirmation from the other co-landlords that allow the installing of PV by the person interested (e.g. of the building). The remaining documents are technical reports, plans and brochures or responsible engineer declarations relating to the system installer.


  • Title deeds (contract with transfer to the Land Register or lease)
  • Planning permission or building legitimacy details
  • Last PPC bill (mandatorily acquitted)
  • Solemn declarations of the persons interested
  • Written permission of the co-landlords (Decision of the General Meeting or Solemn Declarations)
  • Floor plan roof-to-ground roof with photovoltaic systems
  • Monorail project with photovoltaic system
  • Technical brochures of photovoltaic modules-inverters
  • Engineer Solemn Declarations

The HEDNO, after the application, must send the connection offer in 1 month, which is valid for three months. Within 3 months the person interested shall furnish documents and the request for Clearing Convention drawn up by the HEDNO within 15 days. Then the photovoltaic system is constructed and an activation request is filed.

How offset is made with Net Metering

The self-producing net metering is charged with the difference of Absorbed (A) - Infused (I) energy while it is positive. If the difference is equal to zero, there is no debtor energy, whereas if the difference is negative it is also not a debtor energy, while the difference is credited to the next clearing bill as additional outgoing (infused) energy. At the annual clearing any energy surplus is offset by the debtor energy prior periods, for which a reversing is done. Any remaining surplus after the annual reversing is not credited in the next bill. The above is depicted as an example in the table below and relates consumer installation with quarterly enumeration.

  • The regulated rates are calculated as follows:
  • The SDRE is calculated based on the absorbed energy (A) on the same charge.
  • The Billing Use System and Network Use Charge is calculated based on the absorbed energy on the charge.
  • The fee for services of general interest from the consumed energy (C = A + C-I), for the corresponding fee.

Example of Net metering for a residence

A house (100sqm) with 5.000kWh consumption and a heat pump with a consumption of 3.000kWh (annually) would pay to 1.900 € to the PPC. With a photovoltaic net metering 5kWp at a cost lower than 8.000 € (VAT included) it will eliminate the cost of power. The amortization will take place in less than five years. (Return on investment 20%)

Example of Net Metering for a commercial building

If we go on to a small business (hotel) which establishes a system of net metering with a power of 20kWp with a cost of about 23.000 € + VAT, then the hotel will reduce its annual bils by at least 30.000kWh, i.e. more than 5.000 € of savings. Bearing in mind that the cost is deducted by 26% (January 2015), then the investment payback reaches 3 years.

Net metering Advantages

The net metering has numerous positive features:

• The consumption is close to production by reducing losses in cables
• An individual or professional does not depend on the state to be subsidized and ultimately paid for his investment
• The Greek households can forget the cost of power once and for all!
• No matter how many increases the PPC makes, there is no charge.
• The country is exempted from dependencies of energy - costs.
• CO2 emissions are reduced
• Minimizing the environmental burden vicinity generating ergoastasia lignite.
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