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

[Blair May]

I would suggest this as I have seen this w/ a fully charged BB.
> On Mar 16, 2026, at 9:03 AM, Jason Szumlanski via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> 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 <mailto: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 <mailto: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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Blair “TUMP” May
Solarwinds Northernlights east
"We must all learn to live together as brothers,
 or we all will perish as fools."
MLK





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