windy
nation
Page 6 of 16
VertaMax User Manual
Revision 3
IMPORTANT:
For 1500 Watt units, use a minimum of 2 AWG wire with a wire length not to
exceed 4 feet*.
IMPORTANT:
For 3000 Watt units, use a minimum of 1/0 AWG wire with a wire length not to
exceed 4 feet*.
* For wire runs longer than 4 feet, consult a Wire Gauge Chart to safely determine what gauge of
wire will be needed.
2) Prepare cables of equal length to connect the power source to the inverter. The cables
should be as short and thick as possible to reduce the voltage drop between the power
source and the inverter as it draws current from the power source.
a) Inverter end of the cable: Terminate copper wire with a 0.3125” diameter, tin-plated
copper lug. It is recommended to cover the lug barrel with 1 inch of heat shrink tubing.
b) Power Source end of the cable: Terminated with a lug or other connector that provides
a secure, low resistance connection. For example, if the power source is a battery, the
cable must be terminated with a battery terminal that clamps to the post on the battery.
IMPORTANT:
If there is an excessive voltage drop and the voltage at the inverter drops
below 10 volts, the inverter will shut down.
3) Wire the positive cable(s) through user-supplied UL-listed fuse (e.g. Buss Fuse ANL-250 or
equivalent) as shown below. The fuse should be as close to the battery as possible. The
specific fuse ampere rating should be sized to allow operation of all your DC powered
equipment but cannot exceed the maximum current (amp) rating of the inverter by more
than 40%.
4) Be sure the inverter power button is in the ‘OFF’ position and the DC Power source is also
off.
5) Connect the cable end with the 0.3125” lug to the Power Input Terminals on the DC Input
end of the inverter as shown below. The red terminal is positive (+) and the black terminal is
negative (-).
Use ¼” Bolts, Washers, and Nuts (provided) and fully tighten the nut/bolt until the Cable Lug
is secured.
