Re: [pvusers] RFI Inverter Problems

["Scott Willing" <willing@mb.sympatico.ca>]

Bill,

This can be a bear to track down.

What brand/model is the inverter? Modified s-wave I presume?

Is the system properly grounded?

Is the inverter designed for permanent installation, with a neutral 
AC terminal that's at ground potential, or is it one of the small 
portable units designed for "temporary" use (wherein the "neutral" AC 
conductor is at ~60VAC wrt ground)?

Is the modem an external model, powered by a separate "wall-wart" or 
is it internal to the computer? If the inverter is mod s-wave, a wall-
wart may not have sufficient filtering to power the modem cleanly.

If you run the computer from the generator, and operate the inverter 
at the same time (preferrably loaded to a similar degree as when 
running the computer) how's the phone line/connection speed? This 
question is intended to sort out whether we're talking about RFI 
transmitted through the air - which is relatively unlikely - or a 
problem caused by the nature of the power waveform and/or grounding 
issues.

-=s



On 7 Nov 2002 at 13:05, Bill Neill wrote:

> I have 5  PV feeding 3 strings of 2 - 6 Volt ddc batteries making a 12
> Volt overall system. 
> 
> The inverter makes so much RFI (radio frequency interference) that the
> telephone line can be very bad, so bad that the computer I am using
> will connect only at 23k, but if I use the generator, I can get 44k.
> No wonder it has to slow down, it is the RFI that is killing me.
> 
> Any suggestions on how to control the RFI??
> 
> Bill Neill
> 
> 
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