Multi Unit XW Pro 6848 System Won't Qualify AC Generator

Hi all, this is my first post here so I'm hoping someone has seen this issue before. We have three Schneider Conext XW Pro inverters in a split phase parallel configuration. With an extended outage we finally decided to wire up the generator to AC2 and we can't get the inverters to qualify the AC input. All three inverters are connected as shown in the install diagrams with all three being connected to L1/L2/N to the generator, N and G are not tied at the generator as indicated in the manual. The voltage all looks right and the frequency is in range, all three show power on the AC2 line but never qualify the input. I'm not sure how much info is relevant to this so I'll info dump below. Anyone have any ideas? Could it be that the frequency is varying too rapidly? I've tried applying a small load to attempt to calm it down but that hasn't helped.
My current thoughts are: get a big Honda inverter generator for cleaner power, OR simply get a 48V generator with auto start and forget about the AC2 input.
They all share a 3000Ah Surette Rolls battery bank
We have the three inverters, two MPPT 80 600 chargers, the Conext gateway, SCP and battery monitor.
The inverters are set with the AC chargers disabled (although enabling made no differnce)
Generally the slave inverters are set to search mode, but we've disabled that and it makes no difference.
We've turned on/off gen support, adjusted the AC2 parameters, breaker size, etc
We've power cycled more than I care to admit.
My current thoughts are: get a big Honda inverter generator for cleaner power, OR simply get a 48V generator with auto start and forget about the AC2 input.
They all share a 3000Ah Surette Rolls battery bank
We have the three inverters, two MPPT 80 600 chargers, the Conext gateway, SCP and battery monitor.
The inverters are set with the AC chargers disabled (although enabling made no differnce)
Generally the slave inverters are set to search mode, but we've disabled that and it makes no difference.
We've turned on/off gen support, adjusted the AC2 parameters, breaker size, etc
We've power cycled more than I care to admit.
Comments
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One is a recent vintage Subaru/robin/hatz 3kw diesel (which our gas oven's brain refuses to work with)
Other is 1930s 650 rpm diesel belted to a ST5 alternator head, which the garage door opener won't work with
AC2 input qualifies and tracks both, even the voltage flicker from the 650rpm diesel
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
Also, XWP is 44hz to 70hz on AC2 max BTW.
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No matter how the defaults are set, the AC2 input relay should energize and then disqualify if not set to reasonable settings. You should hear it. SCP and gateway should record this also.
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I could also be reading in something that is not there. Would not be the first time
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( I ran my house for a week off the eu2000 & XW while I was refreshing my NiFe battery bank )
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
The inverters never try to pull power from AC2, it never gets to that stage. The XW's charger is set at the lowest charge rate, *BUT* I also have tried it with the chargers turned off and it makes no difference. If I take the same gen to my neighbor who has a single identical XW then AC2 qualifies in about 20-30 seconds. The only thing that I see different in the configs is that I am running a multi-unit config (3 XW Pros).
Configuration is not just what you have programmed, but the circumstances the power system is exposed to.
When you are testing the genset, you are disconnecting the grid right?
You left out "together" in the OP BTW.
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You hear the relay when you turn on the gen breaker after 20 seconds or so. You see the XW display change from power out to input amps?
I would enable the charger on the split phase primary inverter only. I would widen freq and voltage to max in AC settings. Make sure you are setting the breaker to 20A on AC 2. Limit the charge to 50%. See what you get.
The advice you get, at least from me is only as good as what you write. Not trying to be an ass either. Always good to go back and read it again. A nasty week here so I hope you stay cool. You have a good system, you should not need a genset if you are in a non coastal part of California.
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When I tested the pro here for the field test, I did not run multiple inverters. Your idea of sending the grid into AC2 is a good one BTW.
Any way you could try this on the 2nd slave (unplug stacking) just to eliminate the master. Wire gen straight into AC2 in case something is not correct in PDP? Also, is firmware up to date? There were 2 new revs since I did the field test here. Borrow a Honda 7000i? That is what I spec for clients. Good Luck!
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Just a question of why you care about anti-islanding if you are off the grid 99.9 percent of the time in California.
If you use a DC genset it will not show power in on the gen input or your gateway screens. The efficiency gain is really a small amount as the Xw charger is power factor corrected.
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