Page 6
DC Input Rear Panel
Preparing for Installation
Typical Wiring block diagram of charger:
24V 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 in
“Estimated 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.
Fuse/Circuit Breaker Rating
150 Adc
•
Based on the size of your 24V 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 protection device needs to be installed within 7 inches
(17.8cm) from the battery positive terminals.
DC Disconnect Switch:
•
Use a 24V or higher rated DC Disconnect Switch with the same or higher rating as the
selected fuse or circuit breaker. Use ignition protected switches when required by local codes.
•
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.
Model
Minimum Wire Size
Recommended Cable Length
SW2420, SW2420i
AWG # 2
< 5 feet
Caution:
Use of smaller gauge cable or longer cable length may cause the inverter to
shutdown under heavy load. It may also melt the cable insulation and catch fire and can result
in death or serious injury. Choice of the cable size should also match with the rating of the DC
fuse used.
Important
: The recommended cable length is limited to < 5 feet. This is due to the
consideration of voltage drop between the battery and the unit. Select a bigger size cable if
Fan
opening
DC Terminals
Po
Negative –
Chassis Ground
