Rated voltage
of inverter
12V
24V
48V
Current Max.
Load power
1500W
1500W
1500W
Max. current
of wire
150A
75A
37.5A
Specification of wire
(cross-sectional area)
(Length=1m)
2
4AWG (21.15mm)
2
7AWG (10.55mm)
2
10AWG (5.26mm)
Specification of wire
(cross-sectional area)
(Length=N m)
2
N
21.15mm
2
N
10.55mm
2
N
5.26mm
6. Battery
1). Voltage and current of the battery
The battery is designed to supply the unit with DC input voltage and the rated
voltage should be in accordance with the rated input voltage of the inverter.
Any voltage exceeding the range of the input voltage of the inverter will
cause over voltage or under voltage protection.
In the meantime, the battery should supply sufficient current. A small
capacity battery cannot drive a large power electrical appliance. In this case,
the battery will cause an under voltage protection because of the over-
discharge of the battery. The simple calculation method of battery current is:
load power divided by battery voltage. Due to the consumption of the inverter
itself, the actual current will be about 10% larger. For example, the voltage of
lead acid battery is 12VDC, and load power is 1000W, therefore, the actual
current of the battery is about 1000W
12V
110% 91.6Adc.
2). Battery operating time
Battery operating time depends on battery capacity and current, and the calculation
formula of operating time is: battery capacity divided by current, that is, battery
capacity divided by the value of the load power divided by battery voltage times 110%.
For example, battery specification is 12V, 2000Ah, load power is 1000W, so the total
discharging time is 2000Ah (1000
12
110%) 21.8 hours
Notice:
The result of the formula above is on the basis of discharging rate of 20 hours
of the battery, that is, the result is from the discharging current of 2000Ah battery not
to exceed 100A. When the charging current exceeds this value, the discharging period
will be reduced. And the capacity of the battery may also influence the result. See the
specification of the battery manufacturer for more detailed information.
7. Connection
1) Grounding
The power inverter has a terminal on the rear panel marked " Grounding "or "
".
This is used to connect the chassis of the power inverter to ground. The ground
terminal has already been connected to the ground wire of the AC output receptacle
through the inverter.
The ground terminal must be connected to the ground wire, which will vary depending
on where the power inverter is installed. In a vehicle, connect the ground terminal to
The chassis of the vehicle. In a boat, connect it to the boat's grounding system. In a
fixed location, connect the ground terminal to earth.
Warnings:
2
Make sure to tighten all connections. The ground wire must be 14AWG (2.08 mm )
or even larger.
Do not operate the power inverter without connecting to ground. Electric shock may
result.
2) Connect to the lead acid battery or other types within dc input range
(1) Please check all the safety precautions before connecting, and then check whether
the battery voltage is in accordance with the input voltage of the inverter. Battery and
inverter voltages must match
(2) The connecting wire must bear enough current. Depending on the table below,
please choose the input DC wire or larger.
4.
5.
Notice:
(1) The table above is only for your reference. In practice, the thick wire can be
replaced by two thin parallel wires if the total cross-sectional area of the wire meets
the requirements.
(2) In high current, the input DC wire may produce voltage drop, therefore, the
operating voltage should be subject to the value on the terminals. If the voltage drop is
too large, you can increase the cross-sectional area or reduce the length of the lead.
(3) Connect cathode wire of the battery to the cathode terminal (black) on the rear
panel of inverter and then connect the anode wire of the battery to the anode terminal
(red) on the inverter, and tighten them.
Warnings:
(1) Please wear eye protection and work clothes when working around the battery to
protect your eyes and skin from acid and corrosive objects.
