DC and AC Cable Wiring Instructions for Sigineer Power Inverter Chargers


AC Wiring

We recommend using 10 to 5 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. Pls 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. All the wirings are CE compliant, Call our tech support if you are not sure about how to wire any part of your inverter.



Wiring Option 1


230V single phase/120V single phase

Input: Ground+Hot line+Neutral

Output: Neutral+ Hot line+Ground

220V 230V 110V 120V single phase inverter charger AC wiring

220V 230V 110V 120V single phase inverter charger AC wiring

Wiring Option 2


120/240V split phase

Input: Ground + Hot line+ Hot line

Output: Hot line+ Hot line +Neutral

120 240V split phase inverter charger AC wiring with 240V output

120 240V split phase inverter charger AC wiring with 240V output

Wiring Option 3


120/240V split phase

Input: Ground + Hot line+ Hot line Output: Hot line +Neutral


Remark: In such case, each 120Vac output hotline can only carry a max of half the rated capacity.


110 220V split phase inverter charger AC wiring with 110 120V output

110 220V split phase inverter charger AC wiring with 110 120V output



Wiring Option 2 and Wiring Option 3 are only allowed for 110/220V split phase models.

Pls wire all the other models according to Wiring Option 1.


WARNING For split phase models, AC input neutral is not required in wiring. Never Connect Input Neutral to Ground or to Output Neutral. Damage will result which is not covered under warranty.

The output voltage of this unit must never be connected in its input AC terminal, overload or damage may result.

Always switch on the inverter before plugging in any appliance.

Damages caused by AC wiring mistakes are not covered under warranty.


Preventing Paralleling of the AC Output

The AC output of the unit should never be connected to the utility power / generator.

Such a connection may result in parallel operation of the different power sources and AC power from the utility / generator will be fed back into the unit which will instantly damage the inverter and may also pose a fire and safety hazard.


DC Wiring

It is suggested the battery bank be kept as close as possible to the inverter. The following is a suggested wiring option for 3 meter DC cable.


One cable is always best, but if there is a problem obtaining the recommended size or larger cable, multiple smaller cables will work. Performance of any product can be improved by thicker cable and shorter runs, so if in doubt round up and keep the length as short as possible.

inverter charger battery dc cable terminal end connector requirements installation

Battery cables must have crimped (or preferably, soldered and crimped) copper compression lugs unless aluminum mechanical lugs are used. Soldered connections alone are not acceptable. High quality, UL-listed battery cables are available .These cables are color-coded with pressure crimped, sealed ring terminals.


Battery terminal must be clean to reduce the resistance between the DC terminal and cable connection. A buildup of dirt or oxidation may eventually lead to the cable terminal overheating during periods of high current draw. Use a stiff wire brush and remove all dirt and corrosion from the battery terminals and cables.

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.


WARNING The torque rating range for DC terminal is 12.5NM-20.5NM (9.25-15.19 pound-foot), and the suggested torque rating is 17NM (12.6 pound-foot). Over torquing may break the bolt.
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 compartment with vented battery or gases.
Ensure the inverter is off before disconnecting the battery cables, and that AC power is disconnected from the inverter input.


Please find the following minimum wire size. In case of DC cable longer than 3m, please increase the cross section of cable to reduce the loss.

Power DC Input voltage Wire Gage
1KW 12V AWG 4
1KW 24V AWG 6
1.5KW 12V AWG 1/0
1.5KW 24V AWG 4
2KW 12V AWG 1/0
2KW 24V AWG 1/0
2KW 48V AWG 6
3KW 12V AWG 4/0
3KW 24V AWG 1/0
3KW 48V AWG 4
4KW 24V AWG 1/0
4KW 48V AWG 1/0
5KW 24V AWG 4/0
5KW 48V AWG 1/0
6KW 24V AWG 4/0
6KW 48V AWG 1/0

Please follow the above minimum wire size requirement.

Contact us now at info@sigineer.com to learn more.

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