Pure Sign Wave Inverter - Fiberglass RV


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Old 09-24-2013, 11:26 AM   #1
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Pure Sign Wave Inverter

Source for a Pure Sign Wave Inverter

Terex Telelect Pure Sine Inverter Tel 12 1500N | eBay
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Old 09-24-2013, 12:30 PM   #2
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Pure sign inverters are not hard to find. What is special about this one?
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Old 09-24-2013, 12:55 PM   #3
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Whoa, they won't tell you the real price and they want $36 for standard shipping! It would have to be awfully special for me to consider that. Does it do anything clever--card tricks, walk the dog, make coffee for you in the morning?

And it's sine wave. A sign wave is what you get from those people standing out by the street in funny costumes.
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Old 09-24-2013, 12:59 PM   #4
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Whoa, they won't tell you the real price and they want $36 for standard shipping! It would have to be awfully special for me to consider that. Does it do anything clever--card tricks, walk the dog, make coffee for you in the morning?

And it's sine wave. A sign wave is what you get from those people standing out by the street in funny costumes.
Sine wave or sign wave??
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Old 09-24-2013, 02:31 PM   #5
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Nothing against those who want a sine waye Inverter, however I have yet to see a peice of equipment in my trailer that is not happy running on non-sine wave Inverters, this includes numerous tvs, computers, ..... My 1200 watt non sine wave inverter was about the same as the shipping cost for the sine wave inverter. We paid $59 at the Black and Decker outlet.
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Old 09-24-2013, 03:03 PM   #6
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I didn't find any equipment unhappy with our non-sine wave inverter either, until my wife tried to run her little sewing machine on it. It sputtered and quit and acted sew contrary.

A 400w (Samlex brand) sine wave inverter was hardwired in several years ago and the needle has been flying ever since.

My understanding is that some laptops are unhappy too, and likely anything using an electric motor will balk or heat up unnaturally.
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Old 09-24-2013, 03:05 PM   #7
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Nothing against those who want a sine waye Inverter, however I have yet to see a peice of equipment in my trailer that is not happy running on non-sine wave Inverters, this includes numerous tvs, computers, ..... My 1200 watt non sine wave inverter was about the same as the shipping cost for the sine wave inverter. We paid $59 at the Black and Decker outlet.
We have 2 computers that don't like non-sine wave inverters. I had a 100 watt and a 400 watt, replace them with a 300 watt pure sine wave. I don't use that very often now since I got 12 Volt chargers for almost everything.
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Old 09-24-2013, 06:53 PM   #8
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Square wave is for squares. Why not produce AC that makes a pretty picture on a scope? Nuu-ooh, that's not the reason. This is a case where what's right for Byron is right for everybody unless you like cooking laptops.

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Old 09-24-2013, 07:04 PM   #9
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I don't understand Jack's reply. Both Byron and I were relating our experiences. In my case over 3 brands of computers.

If your products require the more expensive sine wave than that's your solution.
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Old 09-24-2013, 07:40 PM   #10
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I have a non-sine wave 300 watt inverter that has run laptop supplies, battery chargers, and a heating pad without problems. As the variety of responses shows, experience varies and there is no guarantee how any specific bit of equipment will react to non-sine-wave power.
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Old 09-24-2013, 07:59 PM   #11
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Your laptop, for the most part, really doesn't care what type of AC it's getting!

check this out: Is square wave inverter harmful to electronic devices

Let the Can O' Worms be opened!

I'm done.

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Old 09-24-2013, 08:12 PM   #12
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Your laptop, for the most part, really doesn't care what type of AC it's getting!
It makes sense to me that switching power supplies (which are now nearly universal) would care little about waveform, so I would not expect laptop supply bricks, modern battery chargers, chargers for phones and similar gadgets, etc. to have any problem with non-sine-wave inverters.

On the other hand, this hasn't worked for some people, and I'm not questioning the validity of their observations.

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Originally Posted by Spanke View Post
Okay, now I've read the linked article. I had low expectations of anything from wiki.answers.com, but this one looks good.
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Old 09-24-2013, 08:14 PM   #13
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Unhappy

The amount of power delivered varies between the types. Over the years i have seen square wave, modified sine wave, triangle wave an sine wave inverters. One issue can be very strong harmonics fed into the equipment using the voltage. A square wave will actually break down into the base frequency plus 3f plus 5f etc. Those harmonics may or may not cause issues, depending on how well the power supply can filter them out (for electronics).

In any event the equipment almost always EXPECTS a sine wave because that is what most of the world delivers. If it works on non sine then you win. Worst case it can burn it up.

I tried to run my cpap with heater on a cheap inverter. The heater died, the cpap itself worked just fine. Go figure.
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Old 09-24-2013, 08:27 PM   #14
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I decided on a true sine wave inverter after trying three different modified sine inverters which all produced so much RF interference as to render them useless. As I recall, "Peak" was one of the useless ones.
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