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BACK OF UNIT (ALL UNITS)
7. Negative (–) DC Power Connection
8. Grounding Post
9. High-Speed Cooling Fans
10. Positive (+) DC Power Connection
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HOW THESE INVERTERS WORK
Your inverter converts low voltage DC (direct current) electricity from a battery to 115 volt AC (alternating current)
household power in two stages. The first stage is a DC-to-DC conversion process that raises the low voltage DC
at the inverter input to 145 volts DC. The second stage converts the high voltage DC into 115 volts, 60 Hz AC.
Power Inverter Output Waveform
The AC output waveform of your inverter is known as a modified sine wave. It is a stepped waveform that has
characteristics similar to the sine wave shape of utility power. This type of waveform is suitable for most AC loads,
including linear and switching power supplies used in electronic equipment, transformers and small motors.
The modified sine wave produced by this inverter has an RMS (root mean square) voltage of 115 volts. Most AC
voltmeters (both digital and analog) are sensitive to the average value of the waveform rather than the RMS value.
They are calibrated for RMS voltage under the assumption that the waveform measured will be a pure sine wave.
These meters will not correctly read the RMS voltage of a modified sine wave. Non-TRUE RMS meters will read
about 20 to 30 volts low when measuring the output of this inverter. For accurate measurement of the output voltage
of this unit, use a TRUE RMS reading voltmeter such as a Fluke 87, Fluke 8080A, Beckman 4410 or Triplett 4200.
115 VOLT AC OUTPUT
APPLIANCE POWER CONSUMPTION
Most electrical tools, appliances and electronic equipment have labels that show the unit’s power consumption in
amps, watts or both. To avoid inverter shutdown and possible damage to the inverter or equipment, do not exceed
the inverter’s wattage rating. To obtain a rough estimate of the current (in amperes) the power source must deliver
where the power consumption of the tool or device is given in watts AC, simply divide the power consumption of
the load by 10. For example, if a load is rated at 200 watts AC, the power source must be able to deliver: 200 divided
by 10 = 20 amperes.
Your 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. Your inverter
