Inverters 12v dc to 240v ac
Use a fully-charged 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 fully-charged 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 (22-30 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 (22-30 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
Minimum Cable Size
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