Eaton 12-110-1250y Operation And Installation Manual page 28

Connecting DC input wires
Reverse polarity – Permanent fuse damage in the inverter will be caused if the polarity of the wires is switched. Positive
must go to positive, and negative must go to negative. Replacement of this fuse must be performed by the manufacturer.
Double-check the cable that was just installed is the positive cable connecting the DC terminal of the inverter to the fuse
holder. Also ensure the other end of the fuse holder is connected to the positive terminal of the battery.
1. Connect the negative cable from the negative post of the battery to the negative DC terminal of the inverter.
2. Install flat washer then the lock washer and nut back on to the inverter. Tighten to 12.2-13.6 Nm (9-10 ft lbs)
Figure 9. DC cable connections
This is how the terminals should look after installation
Grounding
The grounding lug located on the sidewall of the inverter at the DC terminal end is used to connect the inverter chassis
to the battery system's negative connection or grounding bus, as required by electrical regulations. The wiring used for
grounding should be bare copper or provided with green insulation. THIS LUG IS NOT FOR AC GROUNDING. For heavy
trucks or recreational vehicles: use copper wire and connect it between the inverter grounding lug and the vehicle's DC
grounding point (vehicle chassis or assigned grounding bus). Tighten to 6.6 - 7 .3 Nm. (5 - 5.5 ft lbs)
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Eaton 1250W / 1500W / 1800W Inverter Operation and Installation Guide
CAUTION
IM SP180164 / Rev D www.eaton.com