Many years ago, Richard Perez and I built a Gauss meter just for that purpose. What we found (with the old Trace "U" series inverters) was that while EMF was very high on the cables and right at the inverter, six feet or so away, the readings were at nearly background levels. Never tried that with a "modern" inverter. Could be different, I reckon, and I think that say... a 4KW inverter would have more EMF than a 2KW job, but I suspect that the distance to background levels would be about the same. Doesn't mean that someone couldn't be super sensitive to them and have issues, but unless your inverter is under the bed, most folks shouldn't have any danger. On another note, anyone heard anything new about Walt Ratterman? Bob-O
On Feb 4, 2010, at 6:49 AM, robert ellison wrote: At a minimum twist the wires in the conduit. PVC or metal. Bob 2010/2/4 Richard L Ratico <richard.l.rat...@valley.net> Hi Ron, One of our clients claims to be "sensitive" to exposure to EMR. I was initially sceptical, but have come to believe that considerable variation exists in the way individuals react. In our case the objection was to a wireless modem. Sensitivity to high frequency audio is likewise variable among individuals. By the way, are your heavy DC cables between the batteries and inverter all enclosed in grounded metal raceway? It's often tempting to avoid this detail, particularly in a system set up on a temporary basis. Please keep us posted. Dick Ratico Solarwind Electric
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