Appliance Consumption in Amps and Watts Chart (continued)
3/8" Reversible Drill
Household Food Processor
Computer and Monitor
8-Cup Coffee Maker
1-1/8" Rotary Hammer
1/6 H.P. Submersible Sump Pump
Compact Microwave Oven
10" Bench Saw
Note: Appliance specifications may vary from brand to brand. This table is offered only as a guide to approximate
power ratings. Check appliance manuals or product labeling for actual ratings. For continuous use at
maximum output, the MAXX SST™ inverter must be connected to a DC power supply capable of providing
at least 1/10th of the inverter's continuous wattage rating.
The inverter will operate most AC loads within its power rating. Some induction motors used in refrigerators,
freezers, pumps and other motor-operated equipment, require very high surge currents to start them. The
inverter may not be able to start some of these motors even though their rated current draw is within
specifications for this power inverter.
If a motor refuses to start, observe the battery voltage using a DC voltmeter while trying to start the motor. If
the battery voltmeter drops below 11 volts while the inverter is attempting to start the motor, this may be why
the motor won't start. Make sure the battery connections are tight and the battery (or batteries) is (are) fully-
charged. If the connections are good and the battery is charged, but the voltage still drops below 11 volts, you
may need to use a larger battery (or battery combination).
Certain rechargeable devices do not operate well from a modified sine wave inverter. They only operate properly
from a standard household outlet, which provides a pure sine wave. Therefore, the manufacturer recommends
that these types of devices be operated from a standard household outlet only, not from the inverter.
This problem does not occur with most battery-operated equipment. Most of these devices use a separate
charger or transformer that is plugged into an AC receptacle. This inverter is easily capable of running most
chargers and transformers.
Power Source Requirements
The inverter will operate from input voltages between 11 and 15 volts DC. If the voltage drops below 10.5 volts,
an audible low battery warning alarm will sound. The inverter will shut down if the input voltage drops below 10
volts DC. This built-in feature protects the battery from being completely discharged.
The inverter will also shut down if the input voltage exceeds 15.5 volts. This
protects the inverter against excessive input voltage. Although the inverter has built-in protection against over
voltage, it may still be damaged if the input voltage exceeds 15.5 volts.
Inductive loads, such as TVs and stereos, require more current to operate than do resistive loads with the same
wattage rating. Induction motors, as well as some TVs, may require two to six times their rated wattage to start
up. Because the MAXX SST™ inverters have a peak watt power rating, many such appliances and tools may be