SMA Webbox Generation Totals don't match


#1

I setup a sub system using my SMA Webbox - which I had not touched in years. I was able to setup the FTP upload and all seemed to work smoothly. But I have noticed the numbers are not even close.

https://pvoutput.org/list.jsp?id=74048&sid=65698

Generation Totals last 5 days:
21.38
21.77
22.27
23.52
23.46

My sunnyportal.com solar monitor website reports data from the last 5 days(same time period):

47.54
48.00
49.49
51.68
52.23

Why the discrepancy? Did I miss something in my setup?


#2

Still digging here. Maybe I found something.

I have two SMA inverters. The total reported to PVOutput for today was 21.819. When I log into the Sunny Webbox - I can see my two inverters. One of them reports total production for today at 21.811 - which is nearly identical.

The 2nd inverter reports 26.418 - that makes up for the missing data difference.

Could it be that even though both inverters report to the Sunnyportal - only one is having the data uploaded to PVOutput? Or maybe I need to make some edits to account for the 2nd inverter?


#3

You would need to know what the Power Key the power box is using to represent the sum of both inverters. It will usually auto-detect most of the time but won’t work if it is not something standard.

image

The key usually ends with :Pac or :GridMs.TotW and can be identified by looking at the XML file uploaded by the webbox.

e.g. The key below is WebBox:123456789:GridMs.TotW

image


#4

Thank you for the info. I am not sure which key I should be using. I don’t have anything with GridMs.TotW. I do have some items with :pac

But I have two of them - one for each inverter.
WR5KU009:2002268516:Pac
and
WR5KU009:2002268433:Pac

Both seem to report the numbers for each inverter. So putting one of them in as the key did not solve the issue.

Is there a way to use two keys and add them together?

Here is a copy of one of my XML files.
Webbox XML File

Maybe you can make sense of that file?


#5

Enter the key as WR5KU009:2002268516:Pac+WR5KU009:2002268433:Pac


#6

Yes - that did it! It is cloudy and raining here today - so it took me a while to verify I was getting numbers from both inverters.

Thank you so much! Everything seems to be working.