Solar Assistant Load is not correct

[Erling Hviid]

I have a Growatt MID 12KW Hybrid inverter - no battery connected right now - and a Solar Assistant on a Raspberry Pi since primo October 24.
The SmartMeter is an Eastron SMD630 3 phase meter between the grid and my installation. Growatt is set to No export Limit.
My problem is that LOAD ( the blue curve below) is not calculated correct, as it follows the Sun. In My book The Load = Sun Power + Grid export ( which is negative when exporting), and independent of the Sun Power.


What am I missing here ?

 

[TM48]

How much does the Growatt consume?

 

[timselectric]

With no battery, all of the load is being covered by the sun production.
So, they should track together.

 

[rogerheflin]

I have a Growatt MID 12KW Hybrid inverter - no battery connected right now - and a Solar Assistant on a Raspberry Pi since primo October 24.
The SmartMeter is an Eastron SMD630 3 phase meter between the grid and my installation. Growatt is set to No export Limit.
My problem is that LOAD ( the blue curve below) is not calculated correct, as it follows the Sun. In My book The Load = Sun Power + Grid export ( which is negative when exporting), and independent of the Sun Power.

View attachment 253644
What am I missing here ?

The load is what it believes you house/building is consuming of the solar power. Export is what you aren't using and is being exported based on where your CT's are installed. So solar is the total produce power == load(consumed) - export (and export is negative so it adds).

 

[Erling Hviid]

The load is what it believes you house/building is consuming of the solar power. Export is what you aren't using and is being exported based on where your CT's are installed. So solar is the total produce power == load(consumed) - export (and export is negative so it adds).

Yes - I agree with you, But that is not what the blue graph if showing - The Blue curve follows the SUN Power! - That is not how my load behaves.
And as mentioned my smart meter is located directly at the grid entrance - so it monitors the Grid Power ( + or - )
I still don't get it....

 

[Brett V]

Solar Assistant only reports data it receives from the inverter.

 

[TM48]

Solar Assistant only reports data it receives from the inverter.

Solar Assistant only reports data it asks of the inverter too.

 

[meetyg]

BTW, RED is grid, so it seems you are exporting to the grid, because negative grid means export.

 

[Brett V]

BTW, RED is grid, so it seems you are exporting to the grid, because negative grid means export.

Good catch. If he adds the consumption and export data, I'll bet it equals the solar production.

 

[TM48]

Op is well aware of the export as he mentioned it in his original post.

 

[LakeHouse]

My problem is that LOAD ( the blue curve below) is not calculated correct, as it follows the Sun. In My book The Load = Sun Power + Grid export ( which is negative when exporting), and independent of the Sun Power.

From that graph, it looks visually like Load = Sun + Grid could be correct.
If there's a graph that's wrong, are you sure that it's Load and not Sun? That Solar power distribution might be reasonable for a cloudy day. What does it look like on a sunny day? How is the inverter determining solar power?

 

[meetyg]

Op is well aware of the export as he mentioned it in his original post.

Growatt is set to No export Limit.

Not sure what he meant by this. No limit or No export ?

 

[Erling Hviid]

Not sure what he meant by this. No limit or No export ?

In the Solar Assistant Configuration setting Growatt parameter Export Limit is DISABLED.. so all Generated Solar power not consumed is exported ( the red Curve in the graph

 

[Erling Hviid]

Hello All - I think I eventually realized what the problem is.
The specs for the Eastron looks like below.
Grid is currently connected to the top rail. It is obviously wrong.!!!! Grid need to be connected to the bottom rail .
That explains why exported Sun-Power is interpreted as Load and visa versa.
This is the only explanation I can see, why Load follows the sun.!.
I will get that fixed asap, and for sure it will solve the problem so I can get the correct reporting.
Appreciate all your comments. Issue closed - Thanks

 

[TM48]

Are you sure it's not the other way around? On my system the solar power follows the load.

 

[rogerheflin]

Are you sure it's not the other way around? On my system the solar power follows the load.

If you are off-grid or have zero export set and the batteries are full the the load follows the solar. But if you are charging batteries and/or exporting then solar does not follow the load. he is exporting so load should not follow solar.

 

[LakeHouse]

Hello All - I think I eventually realized what the problem is.
The specs for the Eastron looks like below.
Grid is currently connected to the top rail. It is obviously wrong.!!!! Grid need to be connected to the bottom rail .
That explains why exported Sun-Power is interpreted as Load and visa versa.
This is the only explanation I can see, why Load follows the sun.!.
I will get that fixed asap, and for sure it will solve the problem so I can get the correct reporting.
Appreciate all your comments. Issue closed - Thanks

View attachment 253863

What makes you think the grid needs to be connected to the top? That graphic is ambiguous, but I would guess that the most common flow direction would be from grid to loads, so grid on top and loads on bottom.

Also, if this was wired backwards when the sun was down you should have Load and Grid mirroring each other, rather than following each other. They follow each other.

 

[Haysdb]

I just installed Solar Assistant yesterday and came here to ask why SA isn’t recording anything for load after the sun goes down. SA reports only the portion of solar power consumed by the load, not the actual load? When the sun goes down it reports nothing for the load? The inverter obviously knows what the load is because it’s shown on Deye Cloud.

The other weird thing is that I don’t have any battery yet but the battery graph shows battery power.

The first two photos are what SA shows and what Deye Cloud shows. The 3rd is battery power.

 

[JäseH]

I just installed Solar Assistant yesterday and came here to ask why SA isn’t recording anything for load after the sun goes down. SA reports only the portion of solar power consumed by the load, not the actual load? When the sun goes down it reports nothing for the load? The inverter obviously knows what the load is because it’s shown on Deye Cloud.

The other weird thing is that I don’t have any battery yet but the battery graph shows battery power.

The first two photos are what SA shows and what Deye Cloud shows. The 3rd is battery power.

Did you ever figure this out? I just connected Solar Assistant and am having the same issue. No load and a ghost battery.

 

[Quattrohead]

Can you guys confirm that your inverter is 100% implemented correctly in solar assistant, some models of similar inverters may have registers in different locations that solar assistant is not aware of and hence it will report wrongly.

 

[JäseH]

Mine updated the load info today.

Can you guys confirm that your inverter is 100% implemented correctly in solar assistant, some models of similar inverters may have registers in different locations that solar assistant is not aware of and hence it will report wrongly.

I selected Deye/Sol-Ark in my configuration. Is there somewhere else where an appropriate option needs to be selected?

 

[Haysdb]

The issue I had was the "Grid multiplier" in Configuration > Inverter > Advanced needed to be set to 10W for my Deye SUN-10K-SG05LP1-EU-AM3 inverter.

 

[JäseH]

The issue I had was the "Grid multiplier" in Configuration > Inverter > Advanced needed to be set to 10W for my Deye SUN-10K-SG05LP1-EU-AM3 inverter.

Thanks, I tried changing this setting but it didn't fix the issue.

Edit: on further review, the Inverter isn't capturing grid load when there's no sun either. I think the issue is with the Sol-Ark, not Solar Assistant.

 

[JäseH]

I think I figured this out: the CT units are not installed.

 

[Haysdb]

That would do it.