How to reduce your electricity bill with KNX smart home?
Faced with rising energy prices in Luxembourg, discover how to save up to 50% on your electricity bill thanks to KNX smart home. Concrete calculations, ROI and bespoke solutions.
Potential savings for your home
Analysis of your current electricity consumption
Before optimising your consumption, it is essential to understand where and how you spend your energy. In Luxembourg, a 150m² house consumes on average 15,000 kWh per year, i.e. around €3,600 in electricity bills at 2025 rates.
Average distribution of electricity consumption in Luxembourg
This breakdown clearly shows that 70% of your bill comes from heating and lighting. It is precisely on these items that KNX smart home excels in generating substantial savings.
Specific KNX solutions to reduce consumption
KNX smart home offers precise solutions to optimise every aspect of your energy consumption. Unlike basic solutions, KNX allows fine and intelligent management adapted to your actual habits.
1. Smart lighting management
Lighting savings: 30-40%
- Smart presence detection: Automatic switching off of unoccupied zones
- Automatic dimming: Adjustment according to natural light
- Optimised LED lighting: Programming according to usage hours
- Adaptive scenarios: Minimum lighting required according to activity
2. Heating and cooling optimisation
Heating savings: 25-35%
- Zone-by-zone regulation: Temperature adapted to each room
- Smart programming: Adaptive schedules based on occupancy
- Weather integration: Anticipation according to forecasts
- Blind management: Optimisation of solar gains
3. Automatic equipment control
Equipment savings: 15-25%
- Automatic shut-off: Standby mode for unused devices
- Time programming: Optimal operation according to tariffs
- Smart load shedding: Peak consumption management
Real-time monitoring and consumption tracking
KNX energy monitoring allows you to visualise your consumption in real time and immediately identify overconsumption. This visibility fundamentally changes your relationship with energy.
Advantages of KNX energy monitoring
- Real-time consumption by zone
- Detailed history and analytics
- Overconsumption alerts
- Monthly/annual comparisons
- Bill forecasts
- Automatic optimisations
Concrete savings calculations in Luxembourg
Based on Luxembourg 2025 electricity rates and our experience from over 200 installations, here are the real savings you can expect:
| House area | Current consumption | Current bill | Annual savings | New bill |
|---|---|---|---|---|
| 100m² | 10,000 kWh | €2,400 | €1,200-1,600 | €800-1,200 |
| 150m² | 15,000 kWh | €3,600 | €1,500-2,000 | €1,600-2,100 |
| 200m² | 20,000 kWh | €4,800 | €2,000-2,500 | €2,300-2,800 |
ROI calculation and return on investment
Investment in a KNX solution is quickly paid back thanks to the savings generated. Here is a detailed analysis of the return on investment:
Concrete example: 150m² house in Luxembourg
Initial investment
- Complete KNX installation: €15,000-25,000
- Energy audit: Free*
- Optimised configuration: Included
- User training: Included
Annual savings
- Electricity bill: €1,500-2,000
- Reduced maintenance: €200-300
- Comfort value: €500**
- Total: €2,200-2,800/year
ROI: 6-8 years (savings alone) | ROI: 8-12 years (with property value increase)
*Free audit upon signing the quote | **Equivalent value of additional comfort
Before/after case studies with real figures
Here are two concrete examples of our clients in Luxembourg which perfectly illustrate the savings achievable with KNX smart home:
Case 1: Villa Hesperange (180m²)
BEFORE (2023)
- Consumption: 18,500 kWh/year
- Bill: €4,440/year
- Manual heating by zones
- Traditional lighting
AFTER (2024)
- Consumption: 11,100 kWh/year
- Bill: €2,664/year
- Savings: €1,776/year (-40%)
- Expected ROI: 9 years
Case 2: Luxembourg City house (140m²)
BEFORE (2022)
- Consumption: 14,200 kWh/year
- Bill: €3,408/year
- Fully manual management
- Appliances often left switched on
AFTER (2024)
- Consumption: 8,520 kWh/year
- Bill: €2,045/year
- Savings: €1,363/year (-40%)
- Expected ROI: 7 years
Your action plan to reduce your bill
To maximise your energy savings with KNX smart home, follow this methodical approach that we recommend to all our clients:
- 1
Free personalised energy audit
Analysis of your current consumption, identification of savings opportunities and precise quantification of savings potential for your home.
- 2
Design of the optimised KNX solution
Bespoke design of your KNX installation, prioritising the most profitable items according to your budget and savings objectives.
- 3
Professional installation and configuration
Setup by our KNX-certified technicians with personalised configuration according to your lifestyle to optimise savings from day one.
- 4
Continuous monitoring and optimisation
Performance monitoring, regular adjustments and support to maximise your savings over the long term.
Ready to reduce your electricity bill by 50%?
Our energy-savings experts guide you free of charge, assess your savings potential and propose a bespoke KNX solution.
✓ Free audit without commitment | ✓ Detailed quote with ROI | ✓ Financing available
FAQ - Energy savings with KNX smart home
How much can you save on your electricity bill with KNX smart home?
With KNX smart home, you can save between 30% and 50% on your electricity bill. For an average Luxembourg house (150m²), this represents €1,500 to €2,000 in annual savings.
What is the payback time of a KNX system for energy savings?
The return on investment is generally 8 to 12 years for energy savings alone. Including comfort and property value increase, the ROI is 6 to 8 years.
Can KNX smart home adapt to my existing consumption?
Yes, a personalised energy audit allows the KNX solution to be adapted to your habits and existing home to maximise savings.
Which consumption items are the most profitable to automate?
Lighting (30-40% savings), heating/cooling (25-35%) and electrical appliances (15-25%) are the most profitable to automate.
Is an energy audit necessary before KNX installation?
Yes, a personalised energy audit is essential to identify your consumption items and dimension the optimal KNX solution for your home.
Conclusion: KNX smart home, your best energy investment
Faced with the continuous rise in energy prices in Luxembourg, KNX smart home represents the most effective solution to sustainably reduce your electricity bill. With savings of 30 to 50% and a return on investment of 6 to 8 years, it is a profitable investment that simultaneously improves your comfort and the value of your property.
Immediate action is essential: every month without optimisation represents lost savings. Our free energy audit allows you to know your savings potential precisely without commitment.
Start saving now
Discover your savings potential with a free and personalised energy audit.
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About the author
Marc Weber
KNX energy savings expert
Marc Weber is a specialist in energy optimisation with KNX smart home. He has supported over 200 clients in Luxembourg in reducing their electricity bills.
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