Roof profile · Lac de la Haute-Sûre
Um Knupp 2
9678 Nothum
These figures reflect the full roof potential (140.8 kWp, Klimabonus grant deducted, paid back in ~12 years). You don't have to equip the entire roof: set the size that suits you in the simulator below — from the most affordable entry (~3 482 €) to the full potential.
Actual roof irradiation · solar cadastre (aerial view + heatmap)
Calculator · Klimabonus 2026
Size your system
We start at the ideal size for a household. Drag to aim higher — the government grant and your remaining cost recalculate live.
Um Knupp 2: your roof can fit up to ~75 solar panels (~140.8 kWp). We start at the ideal size for a household — move the slider up to aim higher.
Your turnkey project
- Power
- 6.0 kWp · 15 panels
- Estimated output
- 5 699 kWh/year
- Turnkey price (3% VAT)
- ~11 780 €
The government covers ~49% of your system
Your remaining cost
~6 038 €
That's ~798 €/year in savings — paid back in ~8 years.
Over 25 years, you gain
~13 909 €
Cumulative savings minus your remaining cost · 2 280 kg CO₂ avoided/year.
Indicative estimate (official Klimabonus scale + LU market prices). Amounts to be confirmed by quote and via the Klima-Agence calculator.
Roof data
Characteristics from Luxembourg's official solar cadastre.
- Photovoltaic suitability
- Very suitable (PV class 2)
- Solar thermal suitability
- Very suitable (ST class 2)
- Ground footprint
- 1 588 m²
- Estimated usable area
- 714 m²
- Installable power
- 140.8 kWp (~352 panels)
- Estimated output
- 133 741 kWh/year
- Estimated savings (self-consumption ~40 %)
- 18 724 €/year
- Indicative gross investment
- 217 993 €
- Estimated Klimabonus grant
- −0 €
- Net investment after grant
- 217 993 €
- Estimated payback (on net)
- ~12 years
- CO₂ avoided
- 53 496 kg/year
- Postal code
- 9678
- Municipality
- Lac de la Haute-Sûre
- Coordinates (WGS84)
- 49.939973, 5.882544
- Cadastre identifier (HID)
- 230429
Estimate · official solar cadastre (Klima-Agence)