[RE-wrenches] Outback FXR Slaves Not Charging With AC

[Jason Szumlanski]

Yes, all 4 are set to 60Aac Input and 14Aac Charging.

The masters are ports 1 and 7 with slaves on ports 2 and 8.

Everything seems to be configured properly.

I'm thinking during my testing the batteries were too close to the end of
the bulk phase. This is a 1300aH lead acid battery bank. I'm going to try
to drain them down and turn off PV charging and see what happens. I just
thought it was odd because the two masters clearly indicated BULK charging.
I would have thought all four inverters would share the charging during the
bulk phase.


Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208

On Mon, Mar 16, 2026, 8:58 AM Jay <jay.peltz at gmail.com> wrote:

> And you set each inverter ac input amps as well?
>
> Jay
>
> On Mar 16, 2026, at 6:40 AM, Jason Szumlanski via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
> I inherited am off-grid service client with four FXR3048A configured in
> 120/240 split phase with one master and one slave per leg. I believe I
> configured all of the AC input charging parameters correctly, requesting
> max charge rate from each inverter. However, when AC input is present (from
> a generator) the masters will bulk charge, but the slaves do not charge at
> all. The slaves do share the load, but show 0.0kW for charging.
>
> Any ideas?
>
> Jason Szumlanski
> Florida Solar Design Group
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