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18. DO I NEED MODIFED WAVE OR PURE SINE WA VE INVERTER?
Advantages of Pure Sine Wave inverters over modified s' wave inverters:
a) Output voltage wave form is pure sine wave with very low harmonic distortion and clean power like utility-supplied
electricity.
b) Inductive loads like microwave ovens and motors run faster,
c) Reduces audible and electrical noise in fans, fluorescent lights, audio amplifiers, TV, Game consoles, Fax, and answering
machines.
d)Prevents crashes in computers, weird print out, and glitches and noise in monitors.
e) Reliably powers the following devices that will normally not work with modified sine wave inverters:
• Laser printer, photocopiers
• Certain laptop computers (you should check with your manufacturer)
• Some fluorescent lights with electronic ballasts
•
Power tools employing "solid state" power or variable speed control
•
Some battery chargers for cordless tools
•
Some new furnaces and pellet stoves with microprocessor control
• Digital clocks with radios
• Sewing machines with speed/microprocessor control
• X-10 home automation system
•
Medical equipment such as oxygen concentrators
Modified Sine Wave works well for most uses, and is the most common type of inverter on the market, as well as the most
economical. Pure Sine Wave inverters (also called True Sine Wave) are more suited for sensitive electrical or electronic
items such as laptop computers, stereos, laser printers, certain specialized applications such as medical equipment, a
pellet stove with an internal computer, digital clocks, bread makers with multi-stage timers, and variable speed or
rechargeable tools (see" Appliance Cautions"). If you wish to use those items with an inverter, then choose a Pure Sine
Wave inverter. If you mostly want to run lights, TV, microwave oven, tools, etc, a Modified Sine Wave inverter is fine for
your needs.
We often are asked if computers will work with Modified Sine Wave. It's been our experience that most (with the
exception of some laptops) will work (though some monitors will have interference such as lines or a hum). However, if
you have any doubt about any appliance, tool or device, particularly laptop computers and medical equipment such as
oxygen concentrators, we recommend that you check with its manufacturer to be sure it is compatible with a Modified
Sine Wave inverter. If it is not, choose one of our Pure Sine Inverters instead.
The difference between them is the Pure Sine Wave inverter produces a better and cleaner current. They are also
considerably more expensive. You might find it practical to get a small Pure Sine Wave inverter for any "special need" you
may have, and also a larger Modified Sine Wave inverter for the rest of your applications.
19. WHAT IS AN OVER CUR RENT PROTECTION DEVICE AND WHY DO YOU NEED ONE
Batteries are capable of supplying large amounts of current, and thousands of amperes could be present if a short circuit
were to occur. A short circuit can damage your system, cause a fire and be hazardous to your health. Incorporating an
over current device is an effective line of defense against a short circuit occurrence.
An over current protection device is typically a fuse or circuit breaker that goes inline on the positive cable, between the
inverter and battery, to protect your system. A fast-acting fuse or circuit breaker will blow within milliseconds under short
circuit conditions, preventing any damage or hazards.
It is important to appropriately size your fuse or circuit breaker for both your inverter and cables. An oversized fuse could
result in cables exceeding their ampere capability, resulting in the cables becoming red-hot and dangerous. Consult your
owners1 for the recommended sized fuse or circuit breaker and gauge for a safe installation.
20. SPECIAL USE
Operating a Microwave with a Power Inverter
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