User`s manual

page 17
Some products draw a high surge current to start up. If the
appliance does not operate and the inverter turns off, you may need
a larger inverter. Check that the battery and the wiring to the
inverter is large enough to handle the current draw and that the
battery is fully charged.
Important: Power inverters may not operate some
appliances designed to produce heat such as hair dryers,
heaters, toasters and coffee makers. Always check the power
rating before using these kinds of products to be sure they
do not exceed the power capability of the inverter.
Battery Life
Important: The power inverter can draw lots of amps from your car’s
battery when operating. If you are using it for extended periods of time,
operate your car occasionally to maintain the charge in your car’s
battery. In addition, the power inverter will also draw a small current,
less than 0.1 amp, when turned off. Disconnect it from your car’s battery
if your vehicle will not be used for more than a day. The following chart
shows typical operation times for typical car batteries with the engine not
running for various loads. Check the size of your battery.
Battery Life Chart
Power
Usage
Approximate
12V Current
Typical operation
time with 50 amp-
hour car battery
Typical operation
time with 100 amp-
hour car battery
100 W 9 Amps 5.5 hours 11 hours
200 W 19 Amps 2.6 hours 5.2 hours
500 W 47 Amps 1 hour 2 hours