SMA Solar Technology America LLC
Risk of burns due to hot enclosure parts
The enclosure and the enclosure lid may get hot during operation. The DC load-break switch can
not become hot.
• Do not touch hot surfaces.
• Wait until the inverter has cooled down before touching the enclosure or enclosure lid.
Damage to seals on the enclosure lids in subfreezing conditions
If you open the enclosure lids when temperatures are below freezing, the enclosure seals can be
damaged. This can lead to moisture entering the inverter.
• Only open the enclosure lids if the ambient temperature is not below -5°C (23°F)
• If a layer of ice has formed on the seal of the lid when temperatures are below freezing,
remove it prior to opening the enclosure lids (e.g. by melting the ice with warm air).
Observe the applicable safety regulations.
Damage to the inverter due to moisture and dust intrusion
Dust or moisture intrusion can damage the inverter and impair its functionality.
• Close all enclosure openings of the inverter tightly.
• Never open the inverter when it is raining or snowing, or the humidity is over 95%.
Damage to the type label due to the use of cleaning agents
• If the inverter is dirty, clean the enclosure, the enclosure lid, the type label and the LEDs with
a damp cloth and clear water only.
Installation Manual
CAUTION
NOTICE
NOTICE
NOTICE
STP50-US-40-IA-en_es-11
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