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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