Glenn,
I don't know if this may help.... About 7 months ago I also
replaced 2 SWR2500's with a SB5000TL. Sunwise PVs, system installed
about 10 years ago. Just FYI I have had no issues with AFCI however,
these are installed on a comp roof, DC behind the PVs is USE-2 to the
adjacent combiner with THWN-2 from the combiner to the DC disco below
the inverter.
Is the AFCI either on or off?
Bill
Feather River Solar Electric
On 7/22/2016 6:25 PM, Glenn Burt wrote:
August,
I am currently chasing down unexplained AFCI faults with old SX 160
modules on a metal roof and having replaced two SMA SWR-2500U’s with a
SB 5000TL-US-22. So far I have been swapping input strings to see if
there is a pattern, however no joy.
Next visit is up on the roof (steep pitch) to see if there is anything
obvious.
I hate to simply disable the AFCI functionality without a serious
effort, however I am approaching that point.
It is a T&M job for a system installed by others back in 2004, about
an hour trip 1 way and I am afraid the customer will soon believe I am
stringing out the work.
Looking forward to hearing more of your experience as it develops!
-Glenn
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