• The substructure must not cause any other forces to act on
the modules in addition to wind and snow loads
• The substructure must be correctly attached to the roof or
the floor
• All forces acting on the modules must be transmitted to the
substructure
• There must be no objects on the back side which will
cause concentrations of pressure if the modules bend in
the middle
• The substructure must ensure adequate cooling of the
modules by rear ventilation
• Stress-free attachment of the substructure is essential to
enable thermal expansion
• Avoid additional stresses or torques at the mounting positions
• The clamps must match the rails
• Make sure that clamps, slide-in profiles, etc., likewise do not
touch the glass, including under load
• You should also make sure that the substructure does not
touch the socket, including under load
• With glass-glass modules, the substructure must not cause any
additional shading behind the modules (i.e., there should be
no rails underneath them)
• Make sure that the connecting cables to the socket do not run
between the laminate and the mounting rails
• Avoid contact between different metallic materials (contact
corrosion; refer to the electrochemical series)
• Use corrosion-resistant screws and M8 washers
(diameter ≥ 15.8 mm) for mounting. The fastening screws
and washers should have the same material properties.
Clamp system
Use clamps which meet the following requirements:
• Minimum clamp width: 40 mm
• Clamp height for 35 mm module height
• Clamp depth: 7–11 mm
• The clamps must not touch the front glass
• No cells must be shaded as a result of the clamps
• The clamps must not damage the module frame
• The clamps must provide the required structural strength at
the installation location
• Use clamps which guarantee long-term stability and secure
attachment of the modules to the substructure
• The clamps must be installed in accordance with the manufac-
turer’s instructions, including any specific hardware and torque
requirements. Do not exceed a maximum torque of 20 Nm.
Maintenance and cleaning
• Regular cleaning (once or twice a year) will improve the
energy efficiency of the modules
• Use cleaners containing alcohol (ethanol, isopropyl alcohol)
for manual cleaning or hand washing. Cleaners that are highly
acidic or strongly alkaline must not be used. The modules can
also be cleaned using a soap and water solution.
• Do not use abrasive cleaning agents such as abrasive powder,
steel wool, cleaning pads or scrapers
• Do not use high-pressure cleaners for cleaning
• Remove heavy soiling using plenty of water before wiping the
glass surface. Leave stubborn dirt to soak where necessary
• Never touch the glass with your bare hands because you
could leave fingerprints.
