C.M. Bereznoff wrote:

Hello all,
I have recently installed my all wind and solar electric power system
and I am off the grid.
Here is the problem. My Trace ( Heart) inverter that supplies my AC creates
a lot of EMI noise on the AM band.


From a few years ago:

================================================== =
From: Eric F. Richards )
Subject: Does a 2500-watt inverter cause RFI or EMI in a SW radio?

View this article only
Newsgroups: rec.radio.shortwave
Date: 2000/05/25

(Dave) wrote:

Most inverters produce squarewaves, consisting of a fundamental
frequency and an infinite number of harmonics. As I recall.

Not that many anymore. Many produce a "modified sine wave"
which is really a square wave with a "step" at 0 with the lines
shorted -- helps motors run better -- but better choices exist.

Trace makes a "pure sine wave" inverter that really produces
what I call a "Mayan Temple Wave" with something like 38 steps
in it. I don't like it...

Both Statpower and Exeltech make high-efficiency (85%) true
sine-wave inverters. Exeltech is the brand I prefer... have
two... clean... but they also sell an add-on package in case
you still have noise, but I haven't needed it. I've put mine
on an o-scope to look at the waveforms -- perfect!


http://groups.google.ca/groups?hl=en...oogle%2BSearch


http://snipurl.com/ah48


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