[TowerTalk] keeping the bands quiet: 12 KW PV array

[Bill Eisinger]

Hi- I put in an 8 Kw roof top array this summer. Micro-inverters at each panel rather than a single central inverter. The AC lines from the panels are in conduit to the service panel. The array ground comes down to the same point where the house neutral and station ground are. No noticeable noise or hash on my end.

73's,
Bill, AA7X

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Lizeth Norman
Sent: Saturday, October 25, 2014 5:34 PM
To: towertalk
Subject: [TowerTalk] keeping the bands quiet: 12 KW PV array

Hi all,
Am getting ready to work with a pair of engineers and spec out a 12 KW installation. There will be 3 poles with 14 modules on each pole. The inverters will be at a central location in the panel area, with the AC running 70' to the service panel.

Have spent several evenings reading various mailing list archives as well as many other sources regarding RFI/EMI as it applies to PV arrays and ham radio.

I've taken three things away from my research. One is spend the money on an inverter that has a transformer in it. The second is to run as much (both AC and DC) in conduit as possible. The third is to take care when designing the grounding. (I WILL be using Cadwelds one
shots.)

Does anyone have any experience with PV's regarding RF noise and mitigation strategies?

By the way, I think the whole thing can be sourced from made in USA parts. What a concept!

Thanks,
Norm n3ykf
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