[RE-wrenches] Xantrex AC Fault 186.6v

[Barton Churchill]

I’ve seen services at the end of utility lines have wildly fluctuating voltage, especially during high demand winter months. When voltage goes below or above inverter set points the inverter will disconnect with a fault like you listed. Changing inverters will only help if the new one has a larger voltage window. Otherwise get the utility to install a meter for a month or two, if there is a problem, they have to fix it. Also, if load side mains are undersized for actual load the voltage can drop at the inverter (and everywhere else) causing the same thing.
________________________________
From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> on behalf of Sam Haraldson via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Thursday, December 8, 2022 2:13:23 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Cc: Sam Haraldson <sam at onsiteenergyinc.com>
Subject: [RE-wrenches] Xantrex AC Fault 186.6v

Howdy Wrenches,

Any "old timers" here care to chime in with some basic info on what I might be heading out to see at a 10+ year old ground mount?  It's a Xantrex displaying the message AC Fault 186.6v.  I'm prepared to head out there and troubleshoot blind if no one has anything to offer up but figured why not post a quick message here in case anyone has insight they wish to share with me prior to my visit next week.

Subsequently since this is a ground mount it doesn't need rapid shutdown so if the inverter has failed I probably have some decent options to replace it.  If you've had good luck with a particular brand to use for swaps please share that intel as well.  I don't know how big the array is so all I'm looking for is brands and not models.

Most appreciated,
Sam
Sam Haraldson<mailto:sam at onsiteenergyinc.com>
Installation & Service Manager
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