The TX-203 is connected to the solar panels via MC4 connectors. The TX-204 micro
inverter provides two pairs of MC4 connectors for two solar panels. Simply connect
the DC connection cables of the micro inverter to the matching counterpart of the solar
panel. When doing so, plug the pair of connectors together until you hear a "click"
sound. The connectors of some solar panels have the polarity (+, -) printed on them,
which is valid for the panels. The DC cable of the TX-203/TX-204 with the plus
marking (+) is connected to the - pole of the panel, the negative marked cable (-) to
the + pole. Make sure that the polarity is correct.
The connected solar panel must not exceed the maximum permissible DC
input voltage/solar panel voltage of the micro inverter (see type plate) under
any circumstances!
Note: When plugging in the DC cables, if the AC cable is already plugged in, the micro
inverter LED should immediately flash green and start synchronizing with the grid
within 2 minutes. If the AC cable is not plugged in, the red LED will flash continuously
and repeat this until the AC cable is plugged in (see chapter LED Status).
Connecting the micro inverter to the AC grid (AC connection)
A maximum of 12x TX-203 or 6x TX-204 may be connected to an EU / 50Hz /
230V installation with 16A automatic circuit breaker.
The connection to the mains is made with a suitable power cable. Only use 3-core
cables that are also approved for outdoor installation and have a conductor cross-
section adapted to the amperage (preferably 1.5mm² or 4mm²).
Fasten the connection cables to the mounting rail using UV-stable cable ties in such
a way that the cables are protected from rain and sun and, in particular, the plug
connections cannot lie in a puddle of water. To connect the micro inverter and the
connection cable, the pre-assembled AC plug-in system in combination with an AC
cable and assembled Betteri IP68 connection socket or the AC string input/output can
be used, depending on the delivery variant. To mount a Wieland connector, the pre-
assembled Betteri IP68 connector system must be removed.
Note: Other plug connections / systems may be possible, provided they are suitable
for outdoor use and the current levels involved.
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