FAQ

Complaints can be reported through the complaint form. Which can be found find here find.

Information can be requested through the information request form. That can be found find here find.

Completed (maintenance) work can be reported by maintenance parties using this form.

Amstelius can be reached through the contact form. You can find that find here find.

Amstelius can be reached by phone on weekdays and during business hours at +31 (0) 20 891 25 25.

Amstelius can be reached 24/7 in case of emergencies at +31 (0) 20 891 25 29.

A situation that poses a danger to the building, people or the environment and cannot wait until the next business day. Consider the occurrence of serious damage, burglary, fire, flooding, severe leakage or short circuit.

For all other questions, please contact Amstelius using the contact form. You can find that find here find.

A solar panel is a panel that converts solar energy into electricity. There are different types of panels on the market. For example, Monocrystalline, Polycrystalline and Amorphous. The most common size of a solar panel is 1.65 x 1.0 meters. Other sizes are also possible.

The power of a solar panel is expressed in Watt peak (Wp). The peak power of solar panels ranges from 350 Wp - 400 Wp per year. Solar panels are now available with an average peak output of 500 Wp per year.

How many kWh per Wp depends on the number of hours of sunshine. In the Netherlands, you have to multiply the amount of Watt peak by 0.85 to find out the number of kWh a panel generates. Standard solar panels have a capacity of around 370Wp. So an average solar panel generates about 315kWh per year.

Solar panels can be installed on pitched and flat roofs, as long as the roof structure is strong enough to support the solar panels. The carrying capacity of the roof should be examined and evaluated by a structural engineer in conjunction with the intended solar system. There are exceptions: you cannot install solar panels if your roof contains asbestos or is a flat roof where soft insulation has been used as roofing. Insurers also have requirements for this.

It is also important that there is sufficient direct sunlight on the roof. If the roof is shaded for more than 18 hours in the fall or spring then it is probably not profitable to install solar panels. For this reason, the orientation of the roof is also important. To be profitable, the roof must have an orientation between southwest and southeast.