Re: Inverter Advice

Nate wrote:

"William Boyd" <williamboyd@xxxxxxxxxxxx> wrote in message news:4ccjmnF14i5jpU1@xxxxxxxxxxxxxxxxx

Janet Wilder wrote:


William Boyd wrote:


I just came from WM and their inverters are all modified sine wave. Go to Circuit City or an electronics store, even Radio Shack.
No need to worry about getting one to large, it only draws the amount of power from the batteries required to convert to your load. This is with a small exception of idle power draw which is a few watts.


Others here don't seem to think modified sine wave would be a problem. I'm curious as to why you do. I don't think the inverter actually "operates" the laptop, it just charges the batteries. Am I wrong?

BTW, IIRC the Inverter/charger (YES IT WAS!) we had on the fiver was also modified sine wave. It didn't hurt the laptop.


You are just *NOT READING* my advice. I did not say you needed a true sine wave converter/inverter. I am saying you must know what your power requirements are. And that is
all I am saying. If you would read what reference material I provided, you will see what I am talking about. More specifically; shore power and generator power is true/pure sine wave. As long as you know that modified sine wave power will not burn out the transformer of your charger you can use it. The other things, and they are not a lot of them, more than likely, would not be destroyed. On a crt tv it will give you ripples or wavie lines on the screen, on a the more modern flat screens I don't know what it will do.
That is the reason I for one do not have to guess, just put in the same sine wave power supply as is provided by shore power and generator power, pure sine wave.
Wanta go cheap, go cheap. or do like me, have a 300watt modified sine wave inverter that I run my fan on and a 600watt pure for my Belkin computer power bank and what ever else it will run at the same time. Soon to be changing out to a 1500watt.
Page 3 at the bottom right side,is but one example.
http://www.electusdistribution.com.au/images_uploaded/inverter.pdf

--


BILL P.
Just
Me
&
DOG


Bill,

You said Walmart only carries modified sine waves...go to Circut City or Radio Shack. If you were not telling Janet that she needed something other than modified sine, what the hell were you telling her?

Nate


I was telling her to go to a retail electronics store where they would know what her power requirements were. As the same when I suggested to go to Radio shack. certainly not to buy necessarily from there, but they do have people that have information available to them.
As for the WM comment, I was following up on what some one else had said about inverters being up there, because I had just went up there for other reasons. And the people working there knows less than Lon does, maybe, I think or maybe, what ever, but that isn't much.

--


BILL P.
Just
Me
&
DOG
.

Relevant Pages

  • Re: Inverter Advice
    ... No need to worry about getting one to large, it only draws the amount of power from the batteries required to convert to your load. ... IIRC the Inverter/charger we had on the fiver was also modified sine wave. ...
    (rec.outdoors.rv-travel)
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  • Re: Simple Power Question
    ... The sine wave has amplitude 1 volt. ... the voltage specified is Vrms, which is Vp-p divided by 2*sqrt, the ... power calculations, which is what you are talking about here. ... integration by parts, but it is easier to just use the half-angle ...
    (sci.electronics.design)
  • Re: Battery backup: problem with my APC?
    ... when there was a split-second power outage. ... Despite the fact that my battery shows all 5 lights lit, ... And it aint even the continuous/online UPSs that mostly do produce TRUE sine wave output. ... A square wave is just a sine wave with large harmonics. ...
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  • Re: Simple Power Question
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