[RE-wrenches] Outback IN AC Current Too High

[Roy Rakobitsch]

Kris,

Im guessing your issue may be in relation to high inrush current from
loads?

Have you tried setting the AC input current limit lower than 50A to
experiment?

Just a thought.


Roy Rakobitsch


On Sat, Feb 28, 2026, 11:14 Kristopher Schmid via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hello fellow wrenches,
>
> I have a legacy grid tied outback system that is throwing an IN AC Current
> Too High error followed by an IN AC Current OK message very regularly.  I
> recently replaced the dead FX3648 with a new VFXR3648A.  The original
> system installer did not install a Mate.  The new inverter said that it
> required a Mate3S.  I was unable to source a new one at installation time
> (backordered), so I put in a used Mate3S that I had on the shelf.
>
> I found an old thread on the Outback User Forum from 2012 that mentions
> this issue, but it didn't seem to indicate a definitive solution.  It
> suggested that it was potentially a firmware issue.  I had the client try
> to ACK ALL in the events menu, but the inverter still showed a red error
> light along with the repetitive error beeping.  I also had the client
> verify that the Grid Input AC Limit matched the Grid Input breaker size (50
> A).
>
> This site is 2 hours drive and I am waiting on Wattsun engineering to
> provide a replacement azimuth motor solution for the tracker.  I would like
> to have a solution to this inverter issue in my back pocket when I make the
> trip to replace the tracker motor.
>
> Anyone know the current state of Outback Tech Support?
>
> Any help is greatly appreciated,
> Kris
>
>
> Shine On!
>
> Kris Schmid
> Legacy Solar, LLC
> 137 W 1st Ave
> Luck, WI 54853
> www.legacysolar.com
> 715-653-4295
> NABCEP Certified PV Installation Professional
> Licensed Wisconsin Master Electrician
> BSEE
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