Private solar plants

New solar plants

Before signing the quote

You have decided to install a solar plant on your roof. There are several steps to take into consideration.

• Feasibility – Can the roof support an overload charge due to the solar panels? It is necessary to check this point with the architect/building company. In general, it is necessary to count an overload of 15 to 25 kg/m2 for a solar power plant. Another important point is the current state of the electrical connection. Is it compatible with current regulations (TAB)? Your electrician will have to verify this point upon the appointment. You shoudl contact Klima Agence for any questions related to energy renovation ( www.klima-agence.lu).
• Profitability – Sudstroum would recommend its customers to obtain several quotes before signing it.
• Authorisation: The customer must obtain the agreement of the municipality ( Police des bâtisses, urbanisme ) before carrying out the work.
• Connection Request
  • In Esch/Alzette: The electrician must make a connection request to Sudstroum (Demande-de-raccordement-word-13.09.2024.pdf)
  • Outside of Esch/Alzette: please contact the grid owner ( Creos, Ville d’Ettelbrück, Ville de Diekirch) and introduce a connection requestThe electrician must get information from the network manager of the customer’s municipality.

Before commissioning the solar plant

The customer must conclude a buy-back contract with the network manager in the event of partial/total injection of production.

Signing a Buy-back contract with a variable rate with a power supplier, under certain conditions (1)

Buyback contract with guaranteed rate for 15 years(2)

Existing solar plant

Your solar plant is up and running, and you’re considering switching power suppliers. Sudstroum offers electricity buyback contracts with a negotiated rate in Luxembourg. Please address your request to photovoltaique@sudstroum.lu, specifying:
– Notice of completion of work signed by the electrician (“Notification de fin de travaux signée par l’électricien”)
– Installed capacity of your plant
– Commissioning date
– Connection contract and usage contract from the grid owner

Applicable rates

When concluding connection and usage contracts, you will need to indicate the type of desired rate.

Variable rate (“tarif négocié”)

Sudstroum offers a feed-in contract under certain conditions⁽¹⁾. The applicable rate corresponds to a percentage of the MW Solar Netztransparenz price (( Netztransparenz > Erneuerbare Energien und Umlagen > EEG > Transparenzanforderungen > Marktprämie > Marktwertübersicht)). This is a monthly price quoted on the German stock exchange for renewable energy.

For more information, please send us an email to photovoltaique@sudstroum.lu specifying:
– Installed capacity of your power plant
– Connection contract and usage contract from the grid operator

⁽¹⁾Give up the guaranteed rate for the lifetime of the plant. Solar plant with lifetime self-consumption mode

Guaranteed rate (“tarif garanti”)

The following table corresponds to the injection rate set by Grand-Ducal regulation of 12 April 2019. This rate is valid for 15 years from the commissioning of the plant.

Since 2021, selfconsumption is allowed. An additional meter must be installed for any solar plant with a guaranteed rate. The customer can terminate the guaranteed feed-in contract and sign a feed-in contract with a negotiated rate.

Guaranteed rate for small solar power plant (up to 30 kWp)

Power (kWp)	Rate for 2025 (€/ kWh)	Rate for 2026 (€/ kWh)	Rate for 2027 (€/ kWh)
0-10 kWp	0.1374	0.1333	0.1293
10-30 kWp	0.1291	0.1252	0.1215

Guaranteed rate for larger solar planer without a cooperative

Power (kWp)	Rate for 2025 (€/ kWh)	Rate for 2026 (€/ kWh)	Rate for 2027 (€/ kWh)
30-100 kWp	0.1057	0.1014	0.0974
100-200 kWp	0.1018	0.0977	0.0938

Guaranteed rate for larger solar planer with a cooperative

Power (kWp)	Rate for 2025 (€/ kWh)	Rate for 2026 (€/ kWh)	Rate for 2027 (€/ kWh)
30-100 kWp	0.1135	0.1090	0.1046
100-200 kWp	0.1096	0.1052	0.1010
200-500 kWc	0,0978	0,0939	0,0902

Solar panels on balcony ( Plug & Play)

A “plug & play” type solar plant corresponds to one/two sun cells with up to 799 Wp inverter power. No connection request needs to be addressed to the grid owner. The plug & play plant is connected to a domestic socket.

State subsidies

Subsidies with guaranteed feed-in tariffs rates for 15 years

Currently the “Prime house” subsidies, you can obtain up to 20% of the investment cost ( without taxes):

• Subsidy up to 20% of the investment cost ( without taxes) and is capped at 500 €/kW_p
• Threshold of the solar plant up to 30 kW_p
• A new power meter will be installed
• Self-consumption is allowed as well.
• Client is able to create an energy community and share the produced energy with other consumers
• The rates are explained under the point Guaranteed rate (“tarif garanti”)

 For any further information, please contact the Klima agency advisors.

Subsidies with variable rates

This Klimabonus grant is now available under the following conditions:

. Please find the conditions below:

• 50% investment subsidy ( without taxes) grant for the installation of photovoltaic panels. This grant is capped at € 1,250.00/kWp for orders placed between January 1^st, 2022 and December 31, 2025.
• For a photovoltaic installation whose order date is between January, 1^st, 2023 and September, 30^th, 2024 and the invoice is issued by December, 31^st, 2025, 62,5 % investment subsidy ( without taxes) and is capped at 1’562.50 €/kW_p
• Threshold of the solar plant up to 30 kW_p
• Self-consumption is mandatory ( individual or collective with AER-I / AER-C / CER)
• Must conclude a buy-back contract with a supplier for the surplus electricity. In most cases a individual/collective self-consumption or energy community is set up.

For any further information, please contact the Klima agency advisors.

Energy communities

Sharing groups

The surplus energy is then distributed as follows:

– The locally produced energy is first consumed as much as possible by the occupants of the building to which the power plant (in the illustration below, a photovoltaic power plant) is connected (individual self-consumption or AC, level 1).
– If there is still excess energy from the photovoltaic power plant, it will be shared with the members of the CEL (level 2).
– If the needs of all members of the L-CE are met and there is still excess energy from the photovoltaic power plant, this is shared with the N-CE (level 3).

– Any remaining energy from the photovoltaic power plant, it is then injected into the grid (level 4).

Customers who plan to self-consume their photovoltaic production must subscribe to one of the following plans.

Single energy community (AIR)

A single user connected to the main/house meter and the solar plant.
– Solar plant is connected to a new meter.
– Low or medium voltage grid connection
– Exempt from grid fees, compensation fund, and electricity tax on self-consumption
– User is not a legal entity
– Surplus energy can be shared with other energy communities (ACR/AC1/CEL/APS/CER)
– No need to complete a sharing agreement

Collective sharing groups ( ACR, AC1)

If you want to share electricity with your neighbors, you must become a member of an AC. To do so, you must sign an agreement with your grid manager. This agreement defines the rules for sharing electricity. If you wish, you can leave an AC.

ACR

• Self consumer of collective Renewable Energies within the same building.
• A group of at least two network users, at least one of whom is a self-consumer of renewable energy, who occupy the same building or residential complex located behind the same connection point.
• Exempt from network fees, compensation funds, and electricity tax.
• User is not a legal entity
• Surplus energy can be shared with other energy communities AC1/CEL/APS/CER
• The same POd number is not allowed to be in an ACR an AC1. The user has to choose either an ACR or an AC1.

AC1

• A maximum of three network users,
• Living within a maximum distance of 100 meters
• Connection only to the low-voltage network
• Exempt from network fees, compensation fund, and electricity tax
• User is not a legal entity
• Surplus energy can be shared with other energy communities CEL/APS/CER
• The same POd number is not allowed to be in an ACR an AC1. The user has to choose either an ACR or an AC1.

Collective energy communitiy (APS, CEL & CER)

If you want to share your electricity with other people outside your home, you must become a member of a CE. To do this, you must sign an agreement with your network manager.

CEL

• Local sharing group with a maximum distance of 300m (CEL “Local Renewable Energy Community”). Today, you can share solar and local electricity with several people, thanks to photovoltaic panels installed nearby. Together, you form an energy community made up of producers (who have invested in solar panels) and consumers.
• Members or shareholders are individuals, SMEs, or local authorities, including municipalities.
• Connection only to the low-voltage grid.
• Exempt from network fees, compensation funds, and electricity tax.
• The customer is a legal entity.

APS

• An APS is defined as a user who has multiple injection and withdrawal points in a low-voltage network operated by a single distribution network operator.
• Connection only to the low-voltage network
• Exempt from compensation funds and electricity tax
• Payment of network charges
• The customer is not a legal entity

CER

• CER (National Renewable Energy Community)
• Legal entity whose members or shareholders are individuals, SMEs, or local authorities, including municipalities, and who are grid users whose injection and offtake points are all located in the Grand Duchy of Luxembourg.
• CER must be registered with the ILR. Introduction – Communautés énergétiques – Formulaire de notification
• Exempt from compensation fund, electricity tax
• Payment of network charges
• The customer is a legal entity

Financing of solar power plants by Sudstroum

Sudstroum positions itself as a producer of renewable energy in Luxembourg by fully finance solar plants over 200 m2 of roof space or car parks with more than 70 spaces.

Solar plants between 20-500 kWp (area from 200 m²)

The “No Worries” formula is suitable for customers who wish to produce their own energy, while benefiting from a turnkey solution. In this case, installation and maintenance are the responsibility of Sudstroum for 15 years. Throughout this period, Sudstroum assumes responsibility for the proper functioning of the photovoltaic power plant.

Note :

Following the new Grand-Ducal regulation of 12 April 2019 concerning the connection point, it is now possible to install several photovoltaic installations for the same address provided that a period of 2 years is respected between each installation.

What happens after 15 years?

The solar power plant is transferred to the owner who can continue to inject the production into the network or to make self-consumption. In the latter case, the customer will be responsible for carrying out the electrical modifications. Questions should be sent to the following e-mail address: backoffice@sudstroum.lu.