the suggested torque rating is 17NM(12.6 pound-foot). Over torquing may cause the bolt
to break.
Equipment Damage
The inverter is not reverse polarity protected. Reversing the battery polarity on the DC
input connections will cause permanent damage to the inverter which is not covered under
warranty. Always check polarity before making connections to the inverter.
The inverter contains capacitors that may produce a spark when first connected to battery.
Do not mount in a confined a battery or gas compartment.
Ensure the inverter is off before disconnecting the battery cables, and that AC power is
disconnected from the inverter input.
3.3 AC Wiring Recommendation
We recommend using 10 to 5Awg wire to connect to the AC terminal block.
When in AC mode the AC input power will support both the loads and AC charger, a thicker wire gauge for
AC Input is required. Please consult a qualified electrician about the specific wire gauge required in terms of
wire material and inverter power.
There are 3 different ways of connecting to the terminal block depending on the model. Contact our tech
support if you are not sure about how to wire any part of your inverter. Send email to info@sigineer.com.
Wiring Option 1
120V single phase
Input: Hot line+Neutral+Ground
Output: Hot line+Neutral+Ground
For Model #
PSW71512NC/PSW71524NC/APC
3012NC/APC3024NC/APC3048NC
/APC4012NC/APC4024NC/APC40
48NC
Wiring Option 2
120/240V split phase
Input: Hot line+ Hot line +Ground
Output: Hot line+ Hot line +Neutral
For Model #
APC3012D/APC3024D/APC3048D/
APC4012D/APC4024D/APC4048D/
APC6024D/APC6048D
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