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4 Electrical installation
4.1 Safety
PV modules can produce current and voltage when exposed to light of any intensity. Electrical current
increases with higher light intensity. DC voltage of 50 Volts or higher is potentially lethal. Contacting
the live circuitry of a PV system operating under light can result in lethal electric shock.
De-energize PV modules by removing them entirely from light or by covering their front surface with
an opaque material. Regard the safety regulations for live electrical equipment when working with
modules that are exposed to any light. Use insulated tools and do not wear metallic jewelry while
working with PV modules.
In order to avoid arcing and electrical shock, do not disconnect electrical connections under load.
Faulty connections can also result in arcing and electrical shock. Keep connectors dry and clean, and
ensure that they are in proper working condition. Never insert metallic objects into the connectors,
or modify them in any way in order to secure an electrical connection.
Do not touch or handle PV modules with broken glass unless the PV modules are first disconnected
and you are wearing proper PPE. Avoid handling PV modules when they are wet unless cleaning the
PV modules as directed in this manual. Never touch electrical connections that are wet without
protecting yourself with insulated gloves.
The modules are qualified for application class A: Hazardous voltage (IEC 61730: higher than 50V DC;
EN 61730: higher than 120V), hazardous power applications (higher than 240W) where general
contact access is anticipated.
Installing solar photovoltaic systems requires specialized skills and knowledge. It should be
performed only by qualified and specially instructed personnel. The installer assumes all risk of injury,
including risk of electric shock.
Use only equipment, connectors, wiring and mounting hardware specifically designed for use in a
photovoltaic system.
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