Honda EU3000is Owner's Manual page 36

OPERATION
2.Plug the battery charging cable into the DC receptacle of the
generator.
3.Connect the red lead of the battery charging cable to the positive (+)
battery terminal and the black lead to the negative (–) battery
terminal.
4.Start the generator.
Do not start the vehicle while the battery charging cable is connected
and the generator is running. The vehicle or the generator may be
damaged.
An overloaded DC circuit, excessive current drawn by the battery, or a
wiring problem will trip the DC circuit protector (the yellow indicator
inside the clear circuit protector button will pop out). If this happens,
wait a few minutes before pushing in the circuit protector button to
resume operation. If the circuit protector continues to go OFF,
discontinue charging and see your authorized Honda generator dealer.
The DC circuit protector does not prevent overcharging the battery.
34
BATTERY CHARGING CABLE
(optional equipment)
RED LEAD
BLACK LEAD