Power Star W7 Pure Sine Wave Inverter/Charger User’s Manual www.sigineer.com
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Reducing RF interference
To reduce the effect of radiated interference, twist the DC cables. To further reduce RF interference, shield
the cables with sheathing /copper foil / braiding.
Taping battery cables together to reduce inductance
Do not keep the battery cables far apart. In case it is not convenient to twist the cables, keep them taped
together to reduce their inductance. Reduced inductance of the battery cables helps to reduce induced
voltages. This reduces ripple in the battery cables and improves performance and efficiency.
The torque rating range for DC terminal is 12.5NM-20.5NM (9.25-15.19 ft. lbs.), and the
suggested torque rating is 17NM (12.6 ft. lbs.). 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 Recommendations
We recommend using 12 to 14 AWG wire to connect to the ac terminal block.
When in AC mode the AC input power will supply 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.
Please do the wiring according to local regulations, call our tech support if you are not sure about how to wire any part
of your inverter.
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