Page 7
Preparing for Installation
Typical Wiring block diagram of the Power Inverter:
12V Battery Bank:
•
The use of a deep cycle battery is highly recommended for power inverter application
•
For battery size, you need to identify what you wish to operate, and for how long. It is
recommended that you purchase as much battery capacity as possible. See more on Battery
Run Time in Section 4.
DC Fuse or Circuit Breaker:
•
DC-rated fuse or DC-rated circuit breaker connected along the DC positive line is required.
•
For 1000W Unit, select a fuse or circuit breaker with a minimum of 150 Adc
•
For 2000W Unit, select a fuse or circuit breaker with a minimum of 300 Adc
•
For 3000W Unit, select a fuse or circuit breaker with a minimum of 450 Adc
•
Based on the size of your 12V Battery Bank, determine the overall short circuit current rating of
the battery bank from the battery manufacturer. The fuse or circuit breaker chosen has to be
able to withstand the short circuit current that may be generated by the battery bank
•
For Marine application, the over-current protective device needs to be installed within 7 inches
(17.8cm) from the battery positive terminals.
DC Disconnect Switch:
•
Select a DC Disconnect Switch with the same or higher rating of the selected fuse or circuit
breaker.
•
The DC Disconnect Switch is used to disconnect the DC power between the unit and the battery
bank during service, maintenance or trouble shooting.
DC Input Cable Size:
•
All DC cables require insulated multi-strand low resistance cable.
•
The DC cables must be copper and must be rated 105
Ԩ
minimum.
•
For 1000W Unit, use minimum #2 AWG wire with maximum cable length of 5 feet.
•
For 2000W Unit, use minimum #2/0 AWG wire with maximum cable length of 5 feet.
•
For 3000W Unit, use minimum #4/0 AWG wire with maximum cable length of 5 feet.
Important: Use of smaller gauge cable or longer cable length may cause the inverter to
shutdown under heavy load and may also melt the cable insulation and catch fire and can result
in death or serious injury.
Grounding Cable Size:
Important: The unit is grounded through the ground stud located near the DC Input terminal and
the chassis of the unit has to be grounded properly before use.
•
For Marine application, the DC grounding cable size may be one size smaller than the minimum
size conductor required for the DC current-carrying conductors and the conductor is no smaller
than #10AWG.
•
For Recreational Vehicle or Caravan application, the unit has to be grounded to the vehicle
chassis with a minimum #8 AWG copper conductor.
Inverter with
Transfer Switch
Unit
DC Disconnect
Switch
DC Fuse or
Circuit Breaker
12 V Battery Bank
AC Output
Ports &
USB Output
AC Input
AC Input
Source