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4. DC Wiring Connections
Follow the instructions to connect the battery cables to the DC input terminals of the
Inverter. The cable should be as short as possible (less than 6 feet / 1.8 meters ideally)
so that it can handle the required current in accordance with the electrical codes or
application regulations. Inappropriate length of cables will reduce the inverter
performance such as poor surge capability, frequent low-input voltage warnings, and
shut-down. When under voltage protect condition, please check the cable size and
specification (length and diameter should conform to manual requirements) between
battery and ECB model.
The longer or the narrower the cable is, the more the voltage drops. Increasing your DC
cable diameter will help to improve the situation will help improve the situation.
The following are recommended cable diameter for the best performance of the inverter.
(Applies to both 120V and 230V versions)
Table 15. ECB series wiring cable diameter and inline fuse
Connect the cables to the power input terminals on the front panel of the inverter. The
red terminal is positive (+) and black terminal is negative (-).
Insert the cables into the terminals and tighten the screw to clamp the wires securely.
WARNING!
1. Make sure all the DC connections are tight (torque to 11 ft-lbs, 15 Nm Max.).
Loose connections could overheat and result in a potential hazard.
2. The installation of a fuse must be on the positive cable. Failure to place a
fuse on “+” cables running between the inverter and battery may cause
damage to the inverter and will void warranty.
Also, only use high quality copper wire and keep the cable length short - maximum of
3 - 6 feet.
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