Synchronized Offsetting: Self-Consumption Photovoltaic Installation and Power Limits

Net billing and virtual net billing offer a significant opportunity for consumers to reduce their energy costs through the use of self-consumption photovoltaic systems. Below is a breakdown of who can install such systems and what power limits apply, based on current legislation.

Who can install a self-consumption photovoltaic system?

1. Natural and Legal Persons:
   Installation rights are granted to:
   • Natural persons (commercial or not).
   • Legal entities of public or private law.

A necessary condition is that they have either the ownership of the space where the system will be installed, or the legal use of it (e.g., through lease or concession). The written consent of the owner is also required.

2. Energy Communities:
   In the case of virtual simultaneous netting, members of Energy Communities, as well as vulnerable consumers or citizens below the poverty line, are eligible to participate, regardless of whether they are members of the community or not.
3. Shared spaces and shared properties:
   Installation in common areas is allowed, with the consent of all co-owners. In cases of small ownership, the agreement of the usufructuary is sufficient.
4. Third Parties:
   If the station is installed by a third party, the station may be matched with consumption facilities belonging to the same premises, but the third party is not considered a self-consumer. In this case, the benefit of excess energy is transferred to the final consumer.

Power Limits of Photovoltaic Systems

Synchronized net billing:
The power of the generating station can reach up to 100% of the agreed consumption power (in kVA).

Virtual Net billing:
The power can reach up to 100% of the installed power of all offset consumption.

Special Provisions for Unconnected Islands

In autonomous island systems, specific limits apply depending on the type of station:

Island	Energy Communities (kW)	Legal Entities (kW)	Other Stations (kW)
Rhodes	1000	500	100
Kos	300	100	50
Lesvos	300	100	50
Thera	200	100	50
Chios	200	100	50
Samos	200	100	50
Other Islands	100	100	20

In conclusion

Synchronized and virtual synchronized netting provide flexibility and financial benefits to consumers, enhancing energy autonomy and sustainable development. With clear conditions and power limits, this process can be made accessible and effective for different types of consumers.