Pure or True Sine wave power inverters, have the name because they best or closely simulate the same power wave for which your local power supplier would supply to you. For South Africa this would be like Eskom. Of course, this sounds great however, there are some limitations, a power inverter IS not your supplier and the power rating and abilities is limited to the rating of the Inverter as well as your battery bank.
You would often hear somebody tell you that you need a true sine wave power inverter to operate your computer…this is nonsense…true sine wave power inverters have their place, but the higher price you pay for them compared to modified sine wave power inverters must also be justified..
Ok, so where and why for true sine wave power inverters?
Before we get there, let us explain to you the logical “application differences”. Most electronic equipment which have a pre power source, this is Computers, Laptops, MOST cell phone chargers, small electronic ballast lights... tills…all of this equipment, take your power as supplied by Eskom or a power inverter and rectify it…after it is rectified it becomes DC and then the DC is converted again to another level of DC …. So... if the power coming in is DC, AC or modified sine wave…it just doesn’t matter as it gets rectified to DC in anyway!!! So if you really just want to run a Laptop. You don’t need a true sine wave inverter.
Most UPS systems, that act as backup power for hundreds of computers ARE NOT true sine wave power inverters they are indeed modified sine wave power inverters.
Further to this, certain equipment using “universal motors” such as vacuum cleaners, drill machines…can operate just as well from DC as AC and or modified sine wave…however there are exclusions to this rule!!!
Some motors such as roof or ceiling fans (fans to keep your house cool), run well on modified sine wave inverters ….but they are noisy!! So too are some other motors…the noisy sound comes from the high frequency harmonics created by modified sine wave inverters... so yes it runs but sounds terrible. .and that buzzing noise is very irritating when you try to sleep.
Some chargers which use, thyristor controls at the input or which have “charge rating options” do need sine wave inverter feedback.
Microwave ovens perform up to 10 x better with sine wave inverters then with modified sine wave inverters
Single phase induction motors, run and operate much better with Sine wave systems.
If you want to operate the following equipment, I would suggest you consider a sine wave power inverter
- Microwave oven
- Roof Fans
- Air conditioners
- High precision chargers
- Swimming pool pump
- Fridges fitted with compressors
- Fridge / Freezer
- Washing Machine
- Camera equipment which use the Line signal for sinc
- Timing devices such as bed alarm clock which use the power signal as a timing base
- Tropical fish tank pumps
If you are uncertain, please contact us for any further suggestions. We will be happy to assist you in your making the correct choice of power inverter.
Our standard range of true sine wave inverters are:
Keywords for this page:
Inverter, Inverters, Power inverter, power inverters, pure sine wave inverter, sine wave inverter, DC to AC sine wave inverter, DC-AC power inverter
