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Connecting the solar modules (DC)
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter DC connections. When light falls on the
solar modules, they immediately start to gener-
ate electricity. This also happens when light
does not fall directly on the solar modules.
► Never disconnect the inverter from the solar
modules when it is under load.
► Turn both DC isolating switches to the OFF
position.
► Disconnect the connection to the mains so
that the inverter cannot supply energy to the
mains.
► Disconnect the inverter from all AC and DC
voltage sources. Ensure that none of the
connections can be restored accidentally.
► Ensure that the DC cables cannot be
touched accidentally.
NOTICE
Maximum power at the DC connections.
Exceeding the maximum current can cause
overheating of the DC connections.
► Always take into account the maximum
current of the DC connections when
planning the installation.
NOTICE
Ingress of moisture.
Moisture can enter via open DC connections.
► To ensure protection degree IP65, close un-
used DC connections with the rubber plugs
that are attached to the DC connections.
Integrated string fuses and DC surge protection devices
► Replace damaged string fuses with devices of the same
type and from the same manufacturer.
► Surge protection devices are available from Delta.
Tools
Mounting tool for disconnecting the DC
plug and the protective caps from the DC
connections. Included in delivery. Amphe-
nol part number: UTXTWA001.
Polarity of the DC voltage
► Check the polarity of the DC voltage of the DC strings be-
fore connecting the solar modules.
24
DC Isolating Switch
France: The DC isolating switches meet the regulations of the
UTE 15-712-1 (VDE 0100 712).
Safety notice
► Before connecting the solar modules, turn both DC discon-
nectors to the OFF position.
Turn the DC disconnectors 1 and 2 to the OFF position
Utilization of thin film modules
Assignment of the DC connections to the DC isolating
switches
The following illustration is also attached to the right side of the
inverter.
Quick Installation Guide for Solar Power Inverter M125HV EU V1 EN 2019-04-01
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