9
USER MANUAL
SAFETY
CAUTION
Grounding of all metal parts of the
construction is the responsibility of
installer.
WARNING
Micro inverters generates power from more
than one source
WARNING
When micro inverter is connected to PV
module and exposed to light, dangerous
voltages may appear on output in case of
malfunction.
WARNING
Inverters with damaged enclosure or wiring
must not be repaired and must be returned
to producer
WARNING
It is forbidden to connect DC input of micro
inverter to the battery or any other DC
power supply. Solar micro inverter can be
connected only to PV module.
2.3 General installation safety guidelines
WARNING
Use only originally supplied cables. Use
original end cap from ALTW cable producer
to ensure IP67 protection on whole cable
trunk.
CAUTION
Connect circuit breaker with overcurrent
protection according to PV plant power and
local standards.
CAUTION
Always fix cables to the frame. Do not allow
PV and grid cables to float free.
CAUTION
If equipment is not used as specified in
this manual and other Letrika documents,
protection provided by the equipment may
be impaired.
The installation must be wired according to local regulations
and standards where inverters are mounted.
Follow local guidelines for grid monitoring devices and other
safety devices to be located between inverters and grid.
CAUTION
If required by local standards, AC wiring must
be additionally protected with RCDs and Earth
Fault Monitors where required.
CAUTION
Before starting inverters for first time, inspect
the wiring, measure isolation resistance be-
tween PV+,PV- and protective ground.
CAUTION
Micro inverters should be mounted on
aluminum frame holding the PV modules.
Preferably on upper side to avoid prolonged
submersion of inverters into water or snow. Do
not left inverters unfixed on the roof.
