[RE-wrenches] Conext XW+ always feeding critical loads subpanel from battery bank

[William Miller]

Dan:



Our early XW systems performed very poorly on sell-back.  Updating firmware
improved the situation.





Updating firmware was painful.  It required most of a day for one system.
It’s been a while but I posted a list of tips to this forum.  I seem to
recall the dongle needs AC and off-grid systems shut down while upgrading,
making off-grid upgrades a logistic problem.   Bring a table for your gear,
the dongle, a headset for the long conversations you will have with tech
support and your lunch.



William





[image: Gradient Cap_mini]
Lic 773985
millersolar.com <http://www.millersolar.com/>
805-438-5600



*From:* RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On
Behalf Of *Dan Fink
*Sent:* Monday, July 18, 2016 3:56 PM
*To:* RE-wrenches <re-wrenches at lists.re-wrenches.org>
*Subject:* [RE-wrenches] Conext XW+ always feeding critical loads subpanel
from battery bank



Installer went out of business, all I have to troubleshoot with is an
as-built 3-line that "may or may not be right." The charge controllers are
a pair Midnite Classic 200s. Customer complained that system selling only
2/3 of what was predicted back to the utility; that appears to be because
everything out of his critical loads subpanel is running off the battery
bank all night, every night, grid or no, so it takes 1/3 of the day to get
the batteries charged up again every day and start selling to the grid.



I have very little experience with the XW+ thus my question for the folks
here. My plan for next week is to show up, make my own as-built 3-line, and
recommission the inverter. Anyone else seen this sort of thing before? Hard
to believe that an electrician would mis-wire or not wire the bypass, I'm
thinking software setting.




Dan Fink

Adjunct Professor of Solar Energy Technology, Ecotech Institute

IREC Certified Instructor™ for:

~ PV Installation Professional

~ Small Wind Installer

Executive Director, Buckville Energy

NABCEP Registered Continuing Education Providers™
970.672.4342
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