6
Operating a Microwave oven with Your Power Inverter
The power rating used with microwave ovens is the "cooking power" which qualifies as the
power being "delivered" to the food being micro waved. The actual operating power
requirement rating is higher than the cooking power rating. This is usually referenced on
the back of the microwave. If the operating power requirement cannot be found on the back of
the microwave, check the owner's manual or contact the manufacturer.
Safety Precautions.
For best results place the power inverter on a reasonably flat surface.
z Keep the inverter dry. Do not expose it to rain or moisture.
DO NOT operate the inverter if the inverter, device being operated or any other surfaces
that may come in contact with any power source are wet. Water and many other liquids
can conduct electricity which may lead to serious injury or death.
z Avoid placing the inverter on or near heating vents, radiators or other sources of heat. Do
not leave the inverter in the passenger compartment of your vehicle. Store in a cool dry
place. Do not place the inverter in direct sunlight. Ideal air temperature should be between
50°F and 80°F.
z In order to properly disperse heat generated while the inverter is in operation, keep it well
ventilated. While in use, maintain several inches of clearance around the top and sides of
the inverter.
z Do not use the inverter near flammable materials. Do not place the inverter in areas such
as battery compartments where fumes or gases may accumulate.
z When the inverter will be operating appliances with high continuous load ratings for
extended periods, it is not advisable to power the inverter with the same batter used to
power your car or truck. If the car or truck battery is utilized for an extended period, it is
possible that the battery voltage may be drained to the point where the battery has
insufficient reserve power to start the vehicle.
z It may be advisable to operate the inverter from a bank of batteries of the same type in a
"parallel" configuration. Two such batteries will generate twice the amp\hours of a single
battery; three batteries will generate three times the amp hours and so on.
How Power Inverters Work.
There are two stages in which a power inverter changes the 12 volt DC (or battery) power into
110V AC (household current).
STAGE 1:
The inverter uses a DC-to-DC converter to increase the DC input voltage from the power
source to 145 volts DC.
STAGE 2:
The inverter then converts the high voltage DC into 110V AC (household current), using
advanced MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) transistors in a full
bridge configuration. This design provides all our inverters with the capability to start and run
difficult reactive loads, while providing excellent overload capability The waveform that is
generated by this conversion is a "modified sine wave" as shown in the diagram below.
