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[pic] What is a Power Inverter? A Power Inverter is an electronic device that converts 12 volts direct current (DC) into household 120 volts alternating current (AC), for operation of power tools, appliances, TV's, radio's, and other devices that plug into standard household outlets.

[pic]What is a sine wave? It is the ideal waveform for the transfer of AC power. There are two types of waveforms available. A "modified sine wave", and the "true sine wave".

[pic]Modified Sine Wave - The modified sine wave is not really a sine wave at all. It is more or less a "stepped wave".   It achieves voltage regulation by varying in width according to the battery voltage and the load. Thus, the wave is not a smooth wave. This will cause problems with loads that require clean sine wave power such as motor loads, sensitive electronics, battery chargers, medical equipment etc.

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[pic]True Sine Wave - Also known as Pure Sine Wave, is the most reliable waveform and provides power almost identical to a standard wall outlet.  The power produced fully assures that your "sensitive loads" will be correctly powered, with no interference. Appliances that are likely to require Pure Sine Wave including digital clocks, battery chargers, light dimmers, motors, and audio/visual equipment. For these reasons, true sine wave inverters are the best choice for flawless operation of ALL equipment. While they are a more expensive choice, the price has come down drastically and is now very cost effective relative to replacing damaged equipment from using slightly lower cost modified wave.

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[pic]What is Continuous and Peak (surge) Power? Continuous Power is the power/wattage the power inverter can consistently maintain.  Peak or Surge power is the highest output, in watts, that the inverter will "surge" to under startup conditions. However, appliances with motors require a "starting load" which is an initial surge of power to get the unit started.  Once started the unit then may only require half of that power to run, called the "continuous load". 

[pic]Can I use my computer with a power inverter? Yes, both sine-wave and modified sine-wave inverter output will operate a computer. However, some components can only be powered by true sine wave output. To save yourself added expense of replacing damaged equipment or trying to filter out noise and interference created by modified wave the true sine wave is always the best choice.

[pic] What is the downside to Modified wave? The short answer is damaged equipment, electromagnetic interference [EMI] which is lines on your TV, or noise from the audio side of the equipment, electric motors will hum and be inefficient.

[pic] What is the downside to true sine wave The only answer is NONE!

[pic]How do install or hook up my power inverter? Small Power Inverters usually include a DC adapter which can plug right into a car's cigarette lighter, or other 12V DC outlets. Inverters that are 300W or larger usually connect directly to a battery via batter cables, or thick 0-4# wire.  Always, follow the manufacturer guidelines. 

Inverters must be installed in a dry place.  Never install inside an automobiles engine bay, or outside where rain or moisture can reach the unit. More information on installation and wiring will be specified in the owner's manual.

[pic] What size power inverter do I need? Sizing an inverter is nothing but simple math.  A TV may require 150 watts and the VCR you want to add with it may require only 100 watts. Just simply add the wattage requirement for all the appliances that will run at the same time.  The answer is 250 watts for both the TV and VCR to run.  However, it is recommended to always go bigger (25%).  This will ensure that the inverter will power all appliances

• Check the appliance rating label, it should be listed in Amps or Watts. If rating is listed in amps, multiply the amps by 120 volts. The answer will be the watts required. This number should be lower than the continuous wattage rating of the inverter.

• If the appliance has a motor or picture tube, start-up surge must also be considered. Start-up surge is extra watts the appliance requires to turn on or "start-up". The start-up surge can be as high as 10 times its rated watts. An example of this would be a skill saw. The lights in the house can dim when the saw is first turned on. This dimming is the start-up surge. With the start-up surge in mind, select an inverter with a continuous wattage rating equal to or larger than the start-up surge.

• Microwave cooking power is not the power required to operate the microwave. It generally requires twice the cooking power. Check the appliance rating label, it should be listed in Amps or Watts. If rating is listed in amps, multiply the amps by 120 volts. The answer will be the watts required. This number should be lower than the continuous wattage rating of the inverter.

[pic] How long can I run a power inverter? The length of time you can operate an inverter depends on the amp-hour capacity of your battery and the load you are running. 

[pic]Inversion is 10:1 if you draw 5amps of A/C you will need to supply the inverter with 50 amps of D/C. Determine your average A/C amperage, multiply that by 10 to get D/C amperage or A/C watts divide by your battery voltage to get D/C amperage.

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