Cotek S Series - AC Safety Grounding; Making DC Wiring Connections

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3-3. AC Safety Grounding
Neutral Grounding (GFCI’S)烉
110V models烉The neutral conductor of the AC output circuit of the
Inverter is automatically connected to the safety ground during inverter
operation. This conforms to National Electrical Code requirements that
separately derived from AC sources (such as inverters and generators)
which have their neutral conductors tied to ground in the same way as
the neutral conductors from the utility tied to ground at the AC breaker
panel. For models configured with a transfer relay, while AC utility
power is present and the Inverter is in bypass mode, this connection
(the neutral of the Inverter’s AC output to input safety ground) is not
present so that the utility neutral is only connected to ground at your
breaker panel, as required. COTEK has tested the following
GFCI-properly when connected to the output of the Inverter.
WARNING!
Never connect the inverter’s output to the AC distribution grid,
such as the household AC wall outlet.
It will damage the Inverter.
220V models
烉
There is no connection made inside the inverter from
either the line or neutral conductor to safety ground.
3-4. Making DC Wiring Connections
The DC cables should be as short as possible (less than 6 feet / 1.8
meters ideally)
The size of the cable should be thick enough to limit the voltage drop to
less than 2% when carrying the maximum input current to prevent
frequent low-input voltage warnings, and shutdown.
The following sizes of cables and fuses are recommended for up to 6 ft.
distance between the batteries and the inverter.
WARNING!
The fuse must be installed on positive cable.
Failure to place a fuse on “+” cables running between the
inverter and battery may cause damage to the inverter and
will void warranty.