SMA Solar Technology AG
This document does not replace any regional, state,
provincial, federal or national laws, regulations or
standards that apply to the installation, electrical
safety and use of the product. SMA Solar Technol-
ogy AG assumes no responsibility for the compliance
or non-compliance with such laws or codes in con-
nection with the installation of the product.
The type label must remain permanently attached to
the product.
2.2 IMPORTANT SAFETY
INSTRUCTIONS
Keep the manual for future reference.
This section contains safety information that must be
observed at all times when working.
The product has been designed and tested in accor-
dance with international safety requirements. As with
all electrical or electronical devices, some residual
risks remain despite careful construction. To prevent
personal injury and property damage and to ensure
long-term operation of the product, read this section
carefully and observe all safety information at all
times.
DANGER
Danger to life due to electric shock when
live components or DC cables are
touched
When exposed to light, the PV modules generate
high DC voltage which is present in the DC cables.
Touching live DC cables results in death or lethal
injuries due to electric shock.
• Do not touch non-insulated parts or cables.
• Disconnect the product from voltage sources
and ensure it cannot be reconnected before
working on the device.
• Do not disconnect the DC connectors under
load.
• Wear suitable personal protective equipment
for all work on the product.
DANGER
Danger to life due to electric shock from
touching an ungrounded PV module or
array frame
Touching ungrounded PV modules or array frames
results in death or lethal injuries due to electric
shock.
• Connect and ground the frame of the PV
modules, the array frame and the electrically
conductive surfaces so that there is continuous
conduction. Observe the applicable local
regulations.
Quick Reference Guide
DANGER
Danger to life due to electric shock when
touching live system components in case
of a ground fault
If a ground fault occurs, parts of the system may still
be live. Touching live parts and cables results in
death or lethal injuries due to electric shock.
• Disconnect the product from voltage sources
and ensure it cannot be reconnected before
working on the device.
• Only touch the cables of the PV modules on
their insulation.
• Do not touch any parts of the substructure or
frame of the PV array.
• Do not connect PV strings with ground faults to
the inverter.
DANGER
Danger to life due to electric shock in
case of overvoltages and if surge
protection is missing
Overvoltages (e.g., in the event of a flash of
lightning) can be further conducted into the building
and to other connected devices in the same network
via the network cables or other data cables if there
is no surge protection. Touching live parts and
cables results in death or lethal injuries due to
electric shock.
• Ensure that all devices in the same network
are integrated in the existing overvoltage
protection.
• When laying the network cable outdoors,
ensure that there is suitable surge protection at
the network cable transition from the product
outdoors to the network inside the building.
• The Ethernet interface of the product is
classified as "TNV-1" and offers protection
against overvoltages of up to 1.5 kV.
STPxx-50-IS-xx-12
2 Safety
5