And the third type, STRING inverter, which is the cheaper and much simpler and has nothing but a single loop of DC wire on the roof. If there is any noise, it is easy to suppress on the ground at the inverter with torroids on just the two DC wires.
The String inverter is simpler and less costly. But it does require all the panels in each array to point the same way. Minimum of about 10 and maximum of about 14 panels per string.
Bob, WB4aPR
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of Greg Stahlman Sent: Monday, February 11, 2019 11:11 AM To: 'Mike Lussier' mike.lussier@gmail.com; amsat-bb@amsat.org Subject: Re: [amsat-bb] Solar panel inverters--radio noise?
General findings have beeen that panels with "mini-inverters" on the panels themselves are very quiet. Panels with "optimizers" or DC-DC converters on each panel and a main inverter on the side of the house are very noisy! I specifically asked for the mini inverters and mine are quiet, but I can hear my neighbors system several hundred feet away with his "optimizers." You can get a bag of ferrites and clamp them on every panel's output and it will drastically quiet them down.
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Mike Lussier Sent: Monday, February 11, 2019 7:48 AM To: amsat-bb@amsat.org Subject: Re: [amsat-bb] Solar panel inverters--radio noise?
I have been running 5.8 Kw system using Kyocera panels and SMA inverters now for 20 years. No noise at all. The inverters are less that 6 feet from my radios.