I made an interesting observation today.
It is horrible dens overcast. My solar production is crap. I peaked at just 1.0 KW and it has ben floating under 600 watts most of the day. Right now it is only 300 watt, when I had 3,300 watts at the same time yesterday. So, I made the choice to turn down the charge current so I am not sucking grid power to charge my battery bank. I know it will not make a full charge, but I will have some if the power does end up going out. So I went into the config page and dialed down the charge power to the lowest it would let me, 5%. That is % of maximum for the XW-Pro. Maximum is 140 amps, so 5% is 7 amps. I clicked on force bulk charge, and there it is, putting just 6.85 amps into the battery bank. It has not even pulled the voltage up 1 volt in 4 hours, but it is going up. I am also going to either disable, or turn the grid support power way down, but in any case, I will only let it run down to 51 volts again, so I have some reserve.
Now the "interesting" part.
As I am here at the computer, I have the Schneider monitor screen up and I glance at it from time to time. I see the battery current fall to near zero. Hmmm. Why? As I look at it, it resumes charging at the low 7 amps a minute later. I pop up the battery summary graph, and I see it has done it a few times, where the current was down near zero, typically only a minute or two, a few times. Hmmm. Never saw this before. I would see some tiny dips, maybe 2 or 3 amps, but this was dropping, 6 out of 7 amps, so it looks like a huge drop. I finally made the connection. The microwave is being fed off the backup loads panel, and when the microwave is running, it is causing my charge current to drop. I normally never see this. But what I think is happening is it is reducing the charge power to limit the power it is pulling from the grid. Normally I would have a bunch of power coming in from the backup load panel from the Enphase solar, but today, the power just is not there. Down to just 200 watts as I am typing, and yes, all 16 panels are "producing" with every panel having made about 300 watt hours today. In the toolkit, the power the last minute was only 151 watts, 8 watts from each panel.
It hit 4PM while I was typing this, and it went to start pushing out 1.5 KW. I tried turning it down, but it really wants to power the backup loads panel, AND feed some back. I ended up just turning off grid support. My battery will rest at 65% until either the sun comes out, or we have a power failure.