I think the other poster's idea that the cables could have been switched
is possible. It could explain the Master getting switched. I'm
certainly not saying a complete internal glitch wasn't it either. We've
all seen our share of those as well.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 11/10/2016 9:26 PM, William Miller wrote:
Ray:
I have no reason to believe anyone has been meddling. No one knows the
password. It does look like some serious glitch.
William
On Nov 10, 2016, at 6:25 PM, Ray Walters <r...@solarray.com
<mailto:r...@solarray.com>> wrote:
It almost sounds like someone got in there and tried to reprogram
stuff themselves. Have you installed the proper anti-Gremlin devices?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 11/10/2016 12:34 PM, William Miller wrote:
Colleagues:
I maintain an off-grid, 8 stack FX Outback system with 3 charge
controllers. The system has been on line for about 6 years. It got
upgraded about 7 months ago with 2 Mate3s.
About a week ago the system shutdown, leaving the customer without
power. A maintenance worker started a generator and power was
restored. I did not hear about the situation for several days.
A maintenance supervisor was dispatched yesterday to work with me
over the telephone to see if we could restart the system. The
system would only run if the inverter output breakers were all off.
I examined the system via Optics. I was very surprised to see that
the system programming was absolutely scrambled. This was so much
so that even the stacking settings were wrong. For example,
inverter 2 was set as a Master, which we all know will crash any
system. Other settings were also found with very random values.
This system was running prior to last Friday, so the stacking at
least must have been right prior to the outage. I am completely
mystified as to how this could have happened.
I am in conversation with Outback who is taking this seriously. I
have not heard back from them yet but I am curious if anyone else
has experienced this or anything similar. I'd like to broaden my
knowledge on this situation to enhance my understanding and to share
any findings with the group.
Thank you in advance for any input.
William Miller
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