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strongly recommends using the genuine connector type specified by München Solar's product data sheet.
Any choice of a different connector type other than specified may void the warranty of the module.
To ensure reliable electric connection and to prevent possible intrusion of humidity, two connectors must
be mated and locked together until a click can be heard.
Long-term exposure to wet environments may cause connectors' poor connectivity, resulting in current
leakage and poor conductivity which voids the warranty. München Solar recommends proper
connector/cable/wire management to prevent moisture intrusion. Depending on the amount of humidity,
München Solar recommends periodic inspections of the installation system to maintain optimal module
performance.
The DC current generated by photovoltaic systems can be converted into AC and fed into a public Grid.
As local utilities’ policies on connecting renewable energy systems to the Grids vary from region to region.
Always seek the advice from a qualified system designer or integrator. Building permits, inspections and
approvals by the local utility are generally required.
Especially for larger installations München Solar recommends lightning protection following the local
requirements and regulations.
When the installation is finished and after connection to the grid please do a professional hand over to the
owner including an installation protocol is required. Provide a clear documentation of the system to the
owner consisting of following minimum data such as: user guide, system layout, data sheets,
performance expectations, electrical system data e.g. a copy of the installation test report following
minimum requirements of IEC 62446 / IEC 60364-6.
4.3.
Grounding
For grounding and bonding requirements, please refer to regional and national safety and electricity
standards. If grounding is required, use a recommended connector type for the grounding wire.
For grounding, this guide refers to module frame grounding. If grounding is required, make sure module
frames (metal exposed to touch) are always grounded.
München Solar recommends always refer to local state and national code requirements for PV module
grounding. München Solar highly recommends negative grounding if it's allowed by local authorities.
When attaching the frame grounding hardware and wire to the frame it must be placed corresponding to
the ground symbol stamped location to ensure proper electrical connection.
München Solar recommends one of the following parts for grounding:
1) Use M5 bolt and washer to bond the ground wire and aluminum frame through the grounding hole (as
shown below). The tightening torque is 3-7Nm. All nuts and washers should be made of stainless steel.
4-14 mm2 (AWG 6-12) exposed copper wire is recommended as ground wire.
