Selling surplus solar electricity

Electricity produced but not consumed on site can be fed into the grid, and in 2026 is bought back at a variable, market-indexed rate of 4 to 10 cents/kWh for self-consumption installations.

Two buy-back schemes in Luxembourg

There is a historical guaranteed feed-in tariff of €0.1374/kWh, set by grand-ducal regulation and guaranteed for 15 years from grid connection — but this scheme is no longer compatible with the Klimabonus 2026, which now requires self-consumption as an eligibility condition for the grant. For new self-consumption installations, surplus fed into the grid is bought back at a variable, market-indexed rate, generally between €0.04 and €0.10/kWh depending on the supplier and contract.

Self-consumption or resale: how to decide?

The choice depends on the gap between the feed-in tariff for surplus (4-10 cents/kWh) and the avoided cost of self-consumed electricity (20-30 cents/kWh): in nearly all current setups, maximising self-consumption (with or without abattery) is clearly more advantageous than selling everything. This is precisely why the new Klimabonus 2026 scheme makes self-consumption a condition of the grant — see our Klimabonus 2026page for details.