• Grounding of the module and frame
Grounding PV modules is necessary to reduce or eliminate shock and fire hazards.
The installer of a PV system is responsible for grounding each module frame. It is
recommended to ground each module frame at the provided grounding holes (
4
mm
or
5/32
inch diameter, marked with the grounding symbol).
The ground connections between modules must be approved by a qualified electrician.
The main earth ground must only be connected by a qualified electrician. UL approved
grounding method is mandatory in the USA and Canada.
Example A:
(Not approved by UL)
The modules can be connected at the grounding holes using cables (
16
mm
2
or
5
AWG)
with cable lugs. To create the conductive connection (frame is anodized), use a bolt (M
4
or
5/32
inch diameter) a serrated washer and a nut.
1)
Cable lug
3)
Serrated washer
2)
Bolt
4
) Nut
Example B:
(Approved by UL)
The modules can be connected at the grounding holes using a Lay-in lug and a bolt
with a serrated washer, a washer and a nut.
Drawings:
Ground connection using a cable lug, a bolt, a serrated washer, a washer and a nut.
1)
Lay-in lug
3)
Serrated washer
5)
Nut
2
) Bolt
4
) Washer
We recommend using the components as listed below. Any UL approved PV grounding
method and components are also acceptable in the US and Canada.
Table:
Recommended components
Item
Description
Manufacturer/
Manufacturer
Distributor
Part Number
Grounding Lug
Lay-In Lug
Ilsco
GBL-
4
Bolt
#
6-32
, SS
McMaster Carr
92314A148
Serrated washer
M
5
, SS
McMaster Carr
91120A140
Washer
ID
9/64
’’, OD
3/8’
’, SS
McMaster Carr
92141A007
Nut
#
6-32
, SS
McMaster Carr
91841A007
• Fire safety
The roof construction and installation may affect the fire safety of a building; improper
installation may contribute to hazards in the event of fire. For roof application, the
modules should be mounted over a fire resistant covering rated for the application.
The module is „non-explosion-protected equipment“. Hence it must not be installed in
the proximity of highly flammable gases and vapors (e.g. filling stations, gas containers,
paint spraying equipment). The module must not be installed near open flames or
flammable materials.
• Suitable environmental conditions
The module is intended for use in temperate climatic conditions.
The module must not be subjected to concentrated light. It must not be immersed in water
or constantly exposed to water spray (e.g. from fountains). There is risk of corrosion with
exposure to salt (it is recommended that modules are installed at least
500
m or
1700
ft
from the sea) and sulfur (sulfur sources, volcanoes). The module may not be exposed to
extremely corrosive chemicals (e.g. emissions from manufacturing plants).
• Suitable installation
Make sure the module meets the technical requirements of the system as a whole. Ensure
that other system components do not exert damaging mechanical or electrical influences
on the modules. When connected in series, modules must all have the same amperage.
When connected in parallel, the modules must all have the same voltage. The modules
must not be connected together to create a voltage higher than the permitted system
voltage. Modules must not be fitted as overhead glazing or vertical glazing (façade).
Ensure that the mounting system can also withstand the anticipated wind and snow
Carefully read through these installation instructions before installing, operating or
servicing the photovoltaic (PV) system. Failure to follow these instructions may result in
bodily injury or damage to property. Keep these instructions! Working on a PV system
requires specialized knowledge and must therefore be carried out only by appropriately
qualified and authorized personnel. Keep children away!
Warning notices
Danger of death from electric shock!
Solar modules generate electricity as soon as they are exposed to light. The
voltage of a single module is less than
50
VDC. When several modules are connected in
series, the summed voltage can be dangerously high. When the modules are connected
in parallel the currents are summed together. Although touch protection is provided
in the form of the fully insulated plug contacts, the following points must be observed
when handling the solar modules to avoid the risk of fire, arcing and fatal electric
shock:
• The installation of higher voltage systems should be done by qualified, licensed
professionals.
• Do not insert electrically conducting parts into the plugs or sockets!
• Do not wear metallic jewelry while performing mechanical or electrical Installation.
• Do not fit solar modules and wiring with wet plugs and sockets! Tools and working
conditions must be dry.
• Exercise extreme caution when carrying out work on wiring and use the
appropriate safety equipment (insulated tools, insulated gloves, etc.)!
• Do not use damaged modules! Do not dismantle modules! Do not remove any part
or label fitted by the manufacturer! Do not treat the rear of the laminate with paint,
adhesives or mark it using sharp objects!
Danger of death from electric shock!
The inverter can produce dangerous, high voltages, even when not connected:
• Exercise extreme caution when working on wiring and the inverter.
• After switching off the inverter, it is essential to wait for the time interval
specified by the manufacturer before beginning any further work.
This allows the high voltage components time to discharge.
• Be sure carefully to follow the inverter manufacturer’s installation instructions.
Danger of death from arcing!
Modules generate direct current (DC) when any amount of light shines on them.
When breaking a connected string of modules (e.g. when disconnecting the DC line from
the inverter under load), a lethally strong arc can occur:
• Never remove the solar generator from the inverter while it is still connected to the
main grid!
• Ensure that the cable connections are in perfect condition (no cracking, soiling or other
contamination)!
Unpacking the modules and storage
• Observe the warnings on the packaging!
The utmost care is required when handling the modules. Take care when unpacking,
transporting, and storing them. Leave modules in packaging until they are to be installed.
Carry modules with both hands. Do not use the connection socket as a handle. Do not
stand modules on hard or rough ground. Do not stand modules on their corners. Ensure
modules do not bow. Do not place modules on top of each other. Do not subject to load,
do not stand on them, do not drop. Do not mark or work on them with sharp objects.
Keep all electrical contacts clean and dry. In order to keep a record of your system, we
recommend that you make a note of the serial numbers. If it is necessary to store the
modules temporarily, a dry, ventilated room should be used.
General safety information
Ensure that the module is used for its intended purpose only. Pay attention to the local
ordinances, building standards and accident-prevention regulations during installation.
The safety information for other system components must also be followed.
Installation
When installing the modules, please pay attention to:
• Safety during installation
Do not carry out installation work when there are strong winds. Secure yourself and
other workers to avoid falling. Secure work materials to prevent articles from falling.
Create a work zone to avoid accidents with other people.
• Keeping within the maximum permitted load
Make sure the support structure adheres to maximum permissible load requirements as
prescribed by local ordinances, particularly in regions of high snow accumulations and
high wind velocities. Take notice to possible bowing of the modules under high loads.
Avoid installing fasteners, cable ties, etc. between the module backside and support
structure (i.e. on mounting rails) as any sharp edges can damage module.
Quick Guide for Users
SolarWorld® solar modules
Last revised: February
2008
Drawing:
Bowing of the module under
high mechanical front loads.
Drawing:
Ground connection using
a cable lug, bolt, serrated
washer and a nut
See: www.ilsco.com; www.mcmaster.com
4
3
2
1
5
3
4
2
1
Drawing:
Grounding symbol
