Larry, As you've already surmised, all switchmode units generate RFI. The usual steps apply: 1) Move the radio antenna as far from the controller as possible; 2) Use coax for the feedline; 3) A set of high-current chokes on the MPPT input and output, connected right at the unit will help (along with appropriate bypass caps); 4) Shield the unit (Faraday shield), then thoroughly ground the shield. #1 is your best bet, but nothing is going to completely eliminate the noise.
Dan --- On Tue, 8/31/10, Larry Crutcher <[email protected]> wrote: > From: Larry Crutcher <[email protected]> > Subject: [RE-wrenches] RFI from MPPT Charge Controllers > To: "RE-wrenches" <[email protected]> > Date: Tuesday, August 31, 2010, 7:00 PM > Does anyone know of a large MPPT > controller that does not produce RFI? Specifically, > customers that are SWL, AM or amateur radio operators need > RF quiet time during the day while operating or listening. > All the controller I have installed make some noise. The > Outback MX60 in my RV decimates every 40 kHz or so with > broadband noise from 160 meters and up. > > Does anyone know how the Xantrex SW, Tristar MPPT or Apollo > do with RFI? > > Many thanks, > > Larry Crutcher > Starlight Solar Power Systems > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
