PURE SINE VS. MODIFIED SINE
WHICH ONE IS BETTER?


What Does a Power Inverter Do ? ✔

A power inverter changes DC power from a battery into conventional AC power that you can use to operate all kinds of devices ... electric lights, kitchen appliances, microwaves, power tools, TVs, radios, computers, to name just a few. You just connect the inverter to a battery, and plug your AC devices into the inverter ... and you've got portable power ... whenever and wherever you need it.

The inverter draws its power from a 12 Volt or 24 Volt battery (preferably deep-cycle), or several batteries wired in parallel. The battery will need to be recharged as the power is drawn out of it by the inverter. The battery can be recharged by running the automobile motor, or a gas generator, solar panels, or wind. Or you can use a battery charger plugged into an AC outlet to recharge the battery.

Which Type of Inverter Do I Need , Pure Sine Wave (also called True Sine Wave) or Modified Sine Wave ? ✔

Advantages of Pure Sine Wave inverters over Modified Sine 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, quieter and cooler.
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 printers, photocopiers, magneto-optical hard drives
•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
•Medical equipment such as oxygen concentrators

Pooxtra carries a full line of Pure Sine Wave and Modified Sine Wave Power Inverters . 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 .


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.


You can also read our Blog Posts "Which Waveform Caters to Your Demand : True Sine Wave or Modified Sine Wave ?" to learn further about the principle of these two waveforms .




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