Battery
Use a fullycharged 12 volt (nominal) battery that can deliver
the required current while maintaining its voltage above 11 volts
(22 volts for 24 volt battery system). A fullycharged 12 volt automobile
battery is capable of delivering up to 50 amperes without an excessive
voltage drop.
DC Power Supply
Use a well regulated DC power supply that has an output voltage
between 11 volts and 15 volts (2230 volts for the 24 volt model)
and can deliver the required current. If the supply is adjustable,
make sure that the output voltage is adjusted to be between 11 volts
and 15 volts (2230 volts for the 24 volt model). The inverter may
shut down if the voltage is outside these limits
and may be damaged if the voltage is above 16 volts (32 volts
for the 24 volt model). Also ensure that any current limit control
is set so that the power supply can deliver the required current.
4.2 DC Cables
Your cables must be as short as possible and large enough to
handle the required current This is to minimize the voltage drop
between the power source and the inverter when the inverter is drawing
large currents from the power source. If the cables introduce an
excessive voltage drop, the inverter may shut down when drawing
higher currents because the voltage at the inverter drops below
10 volts (20 volts on the 24 volt model). Also, longer and/or thinner
cables will reduce the efficiency of the overall system, since excessive
power will be dissipated in the cabling.
For temporary operation at reduced power levels, the guidelines
below Table may be followed, or you can use the cable sizes in
Table 5 on page 16???????.
Max. Test Load Power
Consumption for
Short Term Test

Minimum Cable Size
12v INVERTER

Minimum Cable Size
24v INVERTER

100 watts

# 16 AWG copper

# 18 AWG copper

250 watts

# 12 AWG copper

# 16 AWG copper

500 watts

# 8AWG copper

# 12 AWG copper

Table 1. Tempoary load wire guage chart
