KirpalWe have used tge solid state contactors but have not been happy with
there reliability as they ofen have failed in the open position, the old coil
contactors have been far better over time and seam to cost less. FYI, the solid
state high amp contactors live longer with a heat sink.Jerry
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: [email protected]
Date: 2/5/18 5:28 PM (GMT-10:00)
To: RE-wrenches <[email protected]>
Subject: Re: [RE-wrenches] Outback AC Coupling
We have installed a number of AC coupled systems over the years and believe we
may have some of the first systems installed. Several are over 15 years old
now and represent multiple brands and combinations of inverters. None of these
systems relied on frequency shift by battery inverter to force solar inverter
off line. So far no problems.
All of these systems utilized a 30 or 60 amp power relay having a 120 vac coil
controlled by a smaller control relay having a 12 vdc coil directly controlled
from aux. relay contacts in inverter. High battery voltage triggered array
disconnect from secondary breaker panel on output side of battery inverter.
Only design issues are getting a fail-safe arrangement of the N.O. and N.C.
relay contacts correct, and program settings to avoid boiling AGM batteries.
Jeff Yago
Sent from my iPad
Jeff Yago DTI Solar. [email protected]
Although no trees were killed in the sending of this email, a largenumber of
electrons were terribly inconvenienced.....
On Feb 5, 2018, at 10:04 PM, Kirpal <[email protected]> wrote:
Hi Folks.....Outback no longer supports AC coupling on their Radian systems.
My understanding is that it is because of the unreliability of the ROCB (remote
operated circuit breaker) they were using. I have heard that they are
imminently going to release a white paper about AC coupling using a solid state
relay instead. I was wondering if any of you have done this? Do you have any
advice about the settings for the Auxiliary output settings that control the
relay? Looking for programming advice on the mate 3. I talked to Outback
today and they said until the white paper is released they won't be giving
instructions or advice on this capability. They did tell me not to use the AC
couple mode already programmed into the mate 3 auxiliary output control. Thanks
in advance for any advice! On or off list!!Cheers.
Sunny Regards,
Kirpal KhalsaOregon LRT#25
NABCEP Certified PV Installation Professional
Oregon Solarworks LLC
www.oregonsolarworks.com
541-299-0402
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