Hi all,

Here's a screen shot from the Goodwe SEMS portal

The power flow diagram shows 3352.87 W coming from the PV panels. However the graph (which starts at midnight today) suggests that the panels have never once produced 3Kw.

So... which data do I believe? If the lower diagram is correct then the graph is out, and vice versa. And if the graph is out then it's not much use for figuring out what my system does and when and trying to optimise use.

 

 

Edited August 2, 20196 yr by Bobster
Remove unwanted images

At 14:05 today, according to SEMS, my property was demanding ZERO watts. Which I find hard to believe. Surely the timer switches and the devices on standby (TVs and decoders) would draw something. OK... so the graph is smooth out. I get that. But it never shows me that zero watts were being consumed in the middle of the night.

20 hours ago, Bobster said:

my property was demanding ZERO watts

I agree it is not possible. Did you see this by looking at the SEMS graphs or after downloading the historical date summary and viewing it in excel? I also found the graphs because of the smoothing and the small scale to be quite inaccurate.

Edited August 3, 20196 yr by Fuenkli

8 hours ago, Fuenkli said:

I also found the graphs because of the smoothing and the small scale to be quite inaccurate.

Makes me think that the Carlo Gavazzi some other systems require, may be a good thing as it is quite a challenge to get the data tying up all over.

20 hours ago, Fuenkli said:

I agree it is not possible. Did you see this by looking at the SEMS graphs or after downloading the historical date summary and viewing it in excel? I also found the graphs because of the smoothing and the small scale to be quite inaccurate.

I was looking at the SEMS graphs. I know that I can download spreadsheet data, but I'd prefer to just use the portal or the phone app. Trouble is, the various displays that the portal provides don't agree with each other. Once that happens you know you have to disbelieve at least one of them.

The real time display is in any event not that useful, unless I want to call home and demand to know what or who the heck is using so much electricity? The graph gives me the data to see how I can tweak things to optimise the system.

On 2019/08/02 at 2:20 PM, Bobster said:

At 14:05 today, according to SEMS, my property was demanding ZERO watts. Which I find hard to believe. Surely the timer switches and the devices on standby (TVs and decoders) would draw something. OK... so the graph is smooth out. I get that. But it never shows me that zero watts were being consumed in the middle of the night.

I have noticed that this happens when there is a glitch in the internet - I had a zero last night at around 20:00 (my battery SOC also showed 0% ) for about 1/2 hour and checking my weather station data on the internet also shows that no data was received at that time - funny though cause I was watching Netflix at that stage without issues

Edited August 4, 20196 yr by pspspeed