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ehsab avatar image
ehsab asked

20kWh solar in the middle of the night?

Hi,
My VRM data displays 20kWh in the middle of the night 00:00, this mess upp the data over time.
Is it possible to edit the data on VRM? This must be wrong, there is nothing displayed in System - PV yield.

Kind Regards

VRMsolar
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Riaan Barkhuizen avatar image Riaan Barkhuizen commented ·

Hi @ehsab,

Can you give some more background, what equipment is involved, did it work before etc?

Best Regards

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ehsab avatar image ehsab Riaan Barkhuizen commented ·

3xquattro, fronius sumo on ACout, venusgx, lynx shunt and batteries.

Firat time ive get false readings.

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ejrossouw avatar image ejrossouw commented ·

What does the raw data show? Have you downloaded it and looked at it maybe? The fronius would be my focus purely given from my limited understanding that is where the GX receives its solar data from. Bing it and you will also find similar topics you can look into.

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5 Answers
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @ehsab

We've looked at your VRM data, and found the cause: the amount from the 3 phases somehow gets 'hussled', causing the strange data numbers in VRM.

We're looking at how we can address this.

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ehsab avatar image ehsab commented ·

Hi Daniël,

Had another one tonight at 02:00.

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ehsab avatar image ehsab commented ·

@Daniël Boekel (Victron Energy Staff)

I had another false reading (60kWh solar) at 11:00 today.
Whats special about my setup, it's really frustrating that the VRM data gets screwed up.

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Daniël Boekel (Victron Energy Staff) avatar image Daniël Boekel (Victron Energy Staff) ♦♦ ehsab commented ·

Hi @ehsab

The data from the Fronius sometimes contains strange readings that confuses the VRM system, we're working on a way to handle this in a way it does not produce the strange numbers.

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ehsab avatar image
ehsab answered ·

Happend again over night.


@Riaan Barkhuizen @Daniël Boekel (Victron Energy Staff)
Any ideas?


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Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @ehsab


First check the connection with your Fronius, and make sure all components including Fronius are on latest firmware.

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ehsab avatar image ehsab commented ·

Hi, they are. Connected by cable and no dropped packets on the switchport.

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ehsab avatar image ehsab ehsab commented ·

Happend again about an hour ago. No issues with connectivity.


The Fronius:


0.135kWh today is fairly accurate.
What can I do to troubleshoot this?

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Daniël Boekel (Victron Energy Staff) avatar image Daniël Boekel (Victron Energy Staff) ♦♦ ehsab commented ·

What is the VRM id?

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ehsab avatar image ehsab Daniël Boekel (Victron Energy Staff) ♦♦ commented ·

0cae7d54ca2e

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Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @ehsab

your Fronius is (as far as I can see) -not- on the latest firmware, as is your GX device. Please update firmware first in case of problems, as asked before.

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ehsab avatar image ehsab commented ·

Fronius:

GX:

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Izak (Victron Energy Staff) avatar image
Izak (Victron Energy Staff) answered ·

The underlying cause for this is an issue in the Fronius firmware.

In PV-inverters with an integrated data-manager, you can solve this by upgrading the firmware. It was fixed in an early fro30xxx.upd version.

Where you have an external data manager, this can be caused by a SolarNet timeout between the datamanager and the PV-inverters. New firmware improves the situation but cannot completely rule it out.

To deal with this issue, we modified our Fronius driver to ignore these incorrect zero frames. This will be in a future candidate release.

See here for more information.

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Related Resources

Additional resources still need to be added for this topic

VRM login page

VRM documentation

VRM API documentation

How to change the Owner of a VRM installation