Molenbuurt, Voorbeeldstad · 14 roofs in this street, 162 panels, all fitted by us
Your roof makes power for thirty years. We give it a good start.
Zonnedak Installaties fits solar panels and home batteries in and around Voorbeeldstad. With our own fitters, a made-to-measure layout and an honest calculation: what it costs, what it brings in and when you'll earn it back.
- An average roof with us
- 10 panels · 4.4 kWp
- Yield
- ± 4,000 kWh a year
- Investment
- ± €4,600, 0% VAT
- Break-even
- after ± 8 years
- Our own fitters, no subcontractors
- Layout and calculation up front
- Fitting usually in one day
- Accredited installer, VCA certified
Thirty years on your roof, in eight moments
This is the life of an average solar roof with us. On the right you always see the balance: what you've paid and what your roof has already brought in. Calculated without salderen (net metering), because that ends on 1 January 2027.
- Week 0
The roof scan
We come and look. Direction, shade, tiles, fuse box and your usage. You get a layout and a calculation without salderen, because that scheme ends on 1 January 2027.
About solar panels10 × 440 Wp = 4.4 kWp balance± € 0 - Week 3
Fitting day
One team of two fitters, one day. Hooks under the tiles, rails, panels, a neat cable to your fuse box. By evening your inverter is on.
How fitting works
balance− € 4.600 - Year 1
The first annual overview
About 4,000 kWh. In June your roof makes six times as much as in December. We compare the yield with the calculation and call you if the figures differ.
- 107Jan
- 189Feb
- 329Mar
- 472Apr
- 542May
- 534Jun
- 538Jul
- 464Aug
- 361Sep
- 251Oct
- 131Nov
- 82Dec
kWh per month, at 4,000 kWh a year balance− € 4.050 - Year 3
Add a battery?
If you work from home, have a heat pump or drive electric, a home battery can double your own use. We work it out with your real usage.
About home batteriesbalance− € 2.950 - Year 8
Break-even
From here on your roof earns. A little more with every sunny day, for more than twenty years.
balance± € 0 - Year 13
A new inverter
The inverter is the part that wears out first. Expect one replacement during the life of your panels, around €1,150.
About invertersbalance+ € 1.350 - Year 25
Still 87 per cent
Panels slowly lose a little strength. After 25 years, under the warranty, they still deliver at least 87 per cent of what they did new.
About servicingnew100%year 1095%year 2587%balance+ € 7.500 - Year 30
And after that
Many panels keep going for years. When they're really worn out, they're collected and recycled. Glass, aluminium and silicon get a second life.
balance+ € 9.900
Worked example: 10 panels of 440 Wp on a south-facing roof, 4,000 kWh a year, €4,600 including fitting, electricity price €0.28 per kWh, 35 per cent used directly, feed-in payment €0.06 per kWh, a new inverter in year 13. We calculate your roof separately.
What we do, in the order the power flows
From the light on your tiles to the socket in your kitchen. And then making sure it stays that way.
- 01
Solar panels
Full-black panels, a made-to-measure layout and fitting in one day.
Light becomes direct currentfrom €3,900 - 02
Inverters
Faulty, old or too small? A new one on the wall, fast.
Direct current becomes 230 voltsfrom €95 - 03
Home battery
Store your solar power from the day for the evening.
Stored by day, used in the eveningfrom €4,400 - 04
Servicing and cleaning
Clean panels and a yearly check of the whole chain.
The whole chain clean and safefrom €139
Recently fitted in the area
Three roofs, three different questions. For each project you see the layout as the customer got it beforehand.
March 2024 · Molenbuurt
Terraced house in the Molenbuurt
Twelve full-black panels on an east-west roof, with a hybrid inverter so a battery can be added later.
- Panels
- 12 × 435 Wp, full-black
- Output
- 5.2 kWp
- Orientation
- east and west, 35°
September 2025 · Parkwijk
1930s house with home battery
Fourteen panels on the south-facing roof and a 10 kWh home battery in the utility room, for a family with a heat pump.
- Panels
- 14 × 440 Wp, full-black
- Output
- 6.2 kWp
- Orientation
- south, 45°
June 2023 · Countryside
Barn roof on a dairy farm
Ninety-six panels on the new roof of an old barn on the edge of Voorbeeldstad, fitted in three days.
- Panels
- 96 × 410 Wp
- Output
- 39.4 kWp
- Orientation
- south-east and north-west, 18°
Whoever is on your roof works for us
Zonnedak Installaties started in 2011 from a barn, with a ladder rack on an old van. Maaike Hazenberg was an electrical engineer and felt solar panels deserved better than a salesman at the door. Now the company has nine people: three in-house fitting teams, a service engineer and a planner. Whoever is on your roof works for us.
- 2011founded
- 3,400+roofs in the area
- 9permanent colleagues
What can your roof do?
A roof scan costs nothing. Five working days later we email a layout and an honest calculation, even if the answer is that it doesn't pay off for you.