We are currently in the process of installing a photovoltaic system in an apartment building, or already have one, and would like to share and collectively self-consume the generated electricity between several parties. The following information applies whether the installation is owned by an individual or several partners.
The concept of collective self-consumption can be adopted in the following cases:
- in a residence (several network users in the same building, all connected via a single access point)
- between neighbours (maximum of three network users living in different buildings separated no more than 100 meters)
- in the specific case of a network user with several supply points (e.g. agricultural, business or industrial premises).
Collective self-consumption is only feasible on the low-voltage network belonging to a single grid operator.
Collective self-consumption is possible between grid users occupying the same building (residence) or between neighbours (up to 3 buildings). In any case, the participation in collective self-consumption is always voluntary for the concerned network users.
We therefore take the initiative of bringing together the those interested being part of the sharing group, including at least one owner of a photovoltaic installation installed on the residence or on one of the buildings taking part in the sharing system.
The electricity is shared between the members of the collective self-consumption group at the different supply points of the members. We can choose between two electricity allocation models:
- the simple and static allocation model (default model and recommended by Klima-Agence) where electricity is shared proportionally to the consumption at the various supply points, or alternatively it is allocated on a priority or percentage basis to the members. On the basis of this model, the energy balance is prepared by the grid operator;
- a complex allocation model to be defined by the collective self-consumption group (in this case, the group must draw up the energy balance itself).
We contact our electricity grid operator and take the necessary steps with them.
Complete list of electricity grid operators in Luxembourg:
- Creos Luxembourg S.A.
- Ville de Diekirch
- Electris (Hoffmann Frères Energie et Bois s.à r.l.)
- Ville d’Ettelbruck
- Sudstroum S.àr.l & Co S.e.c.s.
A detailed form (available on the grid operator's website) must be used to provide the following information:
- the representative of the collective self-consumption group
- the members/partners of the collective self-consumption group
- the electricity production and/or storage units
- the chosen model for allocating the electricity produced.
The steps taken with the grid operator culminate in the signing of a collective self-consumption agreement. The model can be consulted on the ILR website.
- In the case of a new installation for which we have opted for the 50% Klimabonus investment subsidy (for which we waive the feed-in tariff), we sign a purchase agreement for the surplus electricity (which we didn’t consume ourselves) with an electricity supplier of our choice.
- If it's a new installation for which we have opted for a 20% Klimabonus investment subsidy (so we benefit from the guaranteed feed-in tariff), or if it's an existing installation for which we still receive the guaranteed feed-in tariff (or the environmental incentive for installations dating from before the end of 2004), the conditions do not change, and we still receive the guaranteed tariff for every kWh we feed into the grid.
- In the case of an existing installation for which we no longer benefit from the guaranteed feed-in tariff or the environmental incentive, we must enter a purchase agreement for the surplus electricity (which we didn’t consume ourselves) with an electricity supplier of our choice.
To determine the terms and conditions of the arrangements, the financial compensation for the electricity distributed as well as the payment procedures, we sign a dedicated electricity allocation agreement between the members of our electricity sharing group.
Once the grid operator has approved our self-consumption and electricity sharing, the purchase agreement for surplus electricity has been signed and our electricity allocation agreement have been signed, we are ready to self-consume our electricity and share it among ourselves!
It is not necessary to set up a company (legal entity) for collective self-consumption.
Generally, there is no need for a professional installer.
In order to determine the terms of distribution, the remuneration of the distributed electricity, as well as the terms of payment, Klima-Agence provides a template for the creation of a collective self-consumption group.