BEFORE I contracted for a system I did visit three sites wit my kenwood tf6a.
Had it on am broadcast as well as ham bands,,,holding it right next
to the SMA 5 kw inverters. Had to get against the cabinet to hear anything !!!!
I figured since it was a German unit, it is subject ot EU / CE limits
on radiation, probably more stringent than FCC / US.
At 01:43 PM 10/28/2014, Tracey Gardner wrote:
Virtually all the inverters in use in the UK are 50Hz ones as they
are grid connected, so we don't generally get the problems that
you're talking about
http://www.windandsun.co.uk/products/Inverters/SMA-Inverters/Sunny-Boy-Inverters
73s Tracey G5VU
----- Original Message ----- From: "Wilson" <infomet@embarqmail.com>
To: <towertalk@contesting.com>
Sent: Tuesday, October 28, 2014 4:23 PM
Subject: [TowerTalk] Solar Array Noise
A little speculation:
I don't know, but doubt there are many actual 60Hz inverters out
there and they would be horrendously costly at multiKW levels, not
to mention inefficient.
Switch rates are tens of KHz, square waves, thus the noise, so the
secret is shielding and choking.
Visit all the sites you can, with a pocket radio tuned to the AM
band. I expect you'll be able to tell which are noisy.
Your dealer should be able to take you to sites with the hardware
he's selling.
And be SURE you understand your contract with your power
company. They won't pay you any more than they have to.
They will also give you a hard time about batteries, if you are in
an area where they are required to pay premium rates for green power.
Charging your batteries at off peak rate and dumping them for green
rate is NOT what they have in mind!
I know people who have batteries for backup, but they are locked
out of the outgoing circuit somehow.
WL
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