Roof profile · Helperknapp
Rue Knäppchen 12
7417 Brouch
These figures reflect the full roof potential (116.5 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.
Rue Knäppchen 12: your roof can fit up to ~75 solar panels (~116.5 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
- 5 401 kWh/year
- Turnkey price (3% VAT)
- ~11 780 €
The government covers ~49% of your system
Your remaining cost
~6 038 €
That's ~756 €/year in savings — paid back in ~8 years.
Over 25 years, you gain
~12 864 €
Cumulative savings minus your remaining cost · 2 160 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
- Suitable (PV class 1)
- Solar thermal suitability
- Suitable (ST class 1)
- Ground footprint
- 1 314 m²
- Estimated usable area
- 591 m²
- Installable power
- 116.5 kWp (~291 panels)
- Estimated output
- 104 862 kWh/year
- Estimated savings (self-consumption ~40 %)
- 14 681 €/year
- Indicative gross investment
- 180 865 €
- Estimated Klimabonus grant
- −0 €
- Net investment after grant
- 180 865 €
- Estimated payback (on net)
- ~12 years
- CO₂ avoided
- 41 945 kg/year
- Postal code
- 7417
- Municipality
- Helperknapp
- Coordinates (WGS84)
- 49.742897, 6.018319
- Cadastre identifier (HID)
- 197359
Estimate · official solar cadastre (Klima-Agence)