Have you had your XW-Pro charging above 50 amp yet?
My immediate answer was, yes of course and I've never seen that. But wait, have I? Then I reread your post and also arrived home.
Any charge rate below 50 amps, the current stays solid as the voltage climbs up, but any time the charge current is above 50 amps, it seems to be constant wattage. I don't think it is any kind of a problem. When I first noticed it, I thought it might have been the charger getting warm and ramping down. The odd part is, I think it is limiting to this charge wattage. My PLC data is not being logged, so I can't be sure, but when I got home from work, I saw the PLC commanding 50% charge rate or 70 amps, and the battery was only taking 53 amps an I see the downward slope in the battery summary graph.
I am going to look through the charger settings and see if there was another field that limits maximum charge power. It is not often that my solar is cranking out this much power AND there is no one home and light load on the system. It was really trying to limit export by cranking up the charge rate.
So, once I got home I popped up Grafana and something jumped out right away.
It's subtle and there's a lot going on, but I ended up pushing some current to the grid in the middle of the day.
Yellow is solar
Blue is grid energy and negative readings are my system pushing power to the grid.
Zoomed in, there is a definite cap to battery charging at about 3.4 kw
But here is battery current and voltage. Current starts at 63.1 and drops to 61.6 as battery voltage increases from 53.5 to 55.5 (the scaling on voltage vs amperage makes it look like a slightly different story)
I was assuming it was that I was accidentally limiting charge current to 45% (140 amps * 45% = 63 amps)
But, no it was at 55%.
I upped it to 65% just in case.
I decided to check the battery graph in Schneider Insight.
Holy crap, 55 amps?!
Now this is interesting!
I knew the XW and Batrium didn't exactly agree on current, I didn't realize the difference was quite so drastic. 15% is more than I like. I'm going to get some 3rd party current numbers tomorrow, if I can. I've got a couple amp clamps I can throw on there to figure out who's reading is incorrect.
I am tempted to play with this now, but I'd have to adjust too many settings. That's a plan for tomorrow for sure.
While poking around looking for an alternate reason for the charge current limit, I found this. I can't remember if EPC
Discharge Power was present before. I am using EPC Charge Power.
I guess I never noticed it before, it is present in the 2020 modbus map. Address 40152.
Without knowing what Schneider had it mind, I would suspect these two are designed for the type of control we are doing. For me, it's handy because the units are already watts, no conversion needed.