[RFI] Solar Panel RFI - Noise begins

[John Brosnahan -- W0UN]

Someone mentioned previously that the controllers supplied by Harbor 
Freight are noisy.

I was wondering what controllers are known to be quiet?  I have four 
sets of the Harbor Freight panels (and four of their little 
controllers) -- a total of 12 panels for about 180 watts with four 
communications grade batteries for a remote location.

I'd like to find a quiet controller with a 30 amp rating (or greater 
for possible future expansion).  Any suggestions?

Thanks  --  John  W0UN