I have a GoodWe 5048ES (FW 2525H) and have noticed that during load shedding on a good, clear sun day the inverter will charge the battery from pulling from panels. The problem is that it cycles the draw from the panels.

It drops down to only pulling base load, slowly climbs to panel peak production, draws that for a minute or so and then drops back down to base load. It is not very noticeable through SEMS Portal, but you can see it through PV Master and clearly through Home-Assistant.

This seriously impedes the time to charge the batteries, especially in winter. Goodwe is just saying I need to change to backup mode or buy more panels..

I was wondering if anyone else had noticed this behavior ?

 

Attached you can see HA when it is "normal" vs when loadshedding occurs.

That's because something is switching on and off that requires the battery to go from charge to discharge mode rapidly (where it stays for a while). If you have enough solar to cover that case, it should not do that, or if you remove the load that does that - looks like it might be a clothes iron going by the frequency?

What battery do you have? What's a typical SOC at 6:00? How long does it usually take to get to 100% SOC?

1 hour ago, P1000 said:

That's because something is switching on and off that requires the battery to go from charge to discharge mode rapidly (where it stays for a while). If you have enough solar to cover that case, it should not do that, or if you remove the load that does that - looks like it might be a clothes iron going by the frequency?

Nope, The house consumption is pretty constant (between 200 -500w) with no real spikes as such, most of the time panels would cover everything I can possibly through without reverting to battery. This is something that is constantly happening during loadshedding regardless of load. 

1 hour ago, Bobster. said:

What battery do you have? What's a typical SOC at 6:00? How long does it usually take to get to 100% SOC?

3x 2.4KW pylontech batteries and 10X330w panels.  I have on-grid discharge set to 30% at the moment, so depending on day charge and eve loadshedding at 7am SOC is anywhere between 40% and 30%. SOC is usually reached by midday, except when I have a load shedding session then this pushes it to late afternoon if it reaches 100% SOC at all.

Edited May 4, 20233 yr by NielZ

2 hours ago, NielZ said:

3x 2.4KW pylontech batteries and 10X330w panels.  I have on-grid discharge set to 30% at the moment, so depending on day charge and eve loadshedding at 7am SOC is anywhere between 40% and 30%. SOC is usually reached by midday, except when I have a load shedding session then this pushes it to late afternoon if it reaches 100% SOC at all.

I usually look at SEMS, and I haven't set up HA. So it occurred to me that maybe this is just what happens but

a: I don't see itd

B: it doesn't make much real difference to charging. 

But you show that it does make a real difference to charging. 

Does the fluctuation happen for the entire load shed, irrespective of load or available PV? 

 

 

Edited May 4, 20233 yr by Bobster.

1 hour ago, Bobster. said:

I usually look at SEMS, and I haven't set up HA. So it occurred to me that maybe this is just what happens but

a: I don't see itd

B: it doesn't make much real difference to charging. 

But you show that it does make a real difference to charging. 

Does the fluctuation happen for the entire load shed, irrespective of load or available PV? 

 

 

Yes - for the entire load shed period anytime during the day and the batteries need charging. (Obviously when the batteries SOC is 100% then it just sits on base load)
You would see the difference in charging..

On SEMS you may see something like this even though the time granularity is lower.

Edited May 4, 20233 yr by NielZ

That is indeed strange!

Same inverter, my HA doesn't shows normal behaviour.

I would log a ticket with Goodwe...

We havent got very far with this, but also we've only seen evidence about your PV. A screenshot from SEMS showing all five traces might give clues. 

Also your battery settings. I just went through mine and you certainly can run a stack of 3 Pylontechs, but the settings are model specific. So what Pylontechs, what are your battery settings, and what mode are you running the Goodwe in? 

Backup mode is not an option IMO. That charges very slowly and reserves the batteries for an outage. Think of it as UPS mode. 

Do you have a comms cable between the master battery and the inverter? 

Did you DIY, or did you get an installer to put this in? If the latter then have you turned to the installer for support?