ESS (Multiplus+MPPT+Fronius+SolarEdge). Energy meter

[joseberezo (JOSE)]

I have an ESS with Multiplus II, MPPT, 314Ah battery, Fronius and SolarEdge. The inverters are decoupled (the lack of grid is rare, so backup is not important). I am using the external Multiplus clamp connected directly (not Carlo Gavvani meters). The problem is that sometimes the AC LOAD measurements are 0 (as in the screenshot) and the grid is negative. Although below it shows the correct value in small (63W in the picture). The question is, is this error due to not using an external Carlo Gavvani type meter? In principle, as it is configured, the measurements of the inverters (which it obtains through the Modbus connection) and MPPT are correct. Only these values ​​​​are not correct on some occasions.
The transformer is located at the network input, after the distribution company’s meter.

Thanks!!

[MikeD (Mike)]

@joseberezo

The inverters are decoupled

Not clear what is meant by this?

[joseberezo (JOSE)]

Thanks! for your answer. The inverters are in AC IN. This picture is my system. And this is the situation of meter transformer connected to Multiplus (no external meter

The inverter send data via modbus to VICTRON SYSTEM. And I can view PV data of inverters in GX.

Thank you for your attention!

[Netrange (Steffen)]

This may be a very common problem with the 3.5 mm jack plug of the power converter. Move it back and forth a few times in the socket and use some contact spray if necessary…

Are you using the old version with the jack plug or the new one with the terminals?

[joseberezo (JOSE)]

I just read about the jack problem in forum. But my Multiplus use terminals . The error values is when yield PV is more bigger that AC loads. The meter read the grid (import or export) but not calculate the load value.

The picture of panel (in the first topic): PV 2734 W: 1729 W to battery (different - 1000 W aprox. is the LOAD), but in AC load the value is 0

In this situation (PV yield 0 - at night-), all values are ok (1086 in AC loads similar 1083 battery dischargin). So, the meter read and calculate correct values:

Thanks!!

[Netrange (Steffen)]

How do you get the values from the SolarEdge into your system? … MPPT and Fronius are clear …

Have you set up the power sensor wizard correctly using VE Config ?

[joseberezo (JOSE)]

The values from SolarEdge: via modbus. Victron console show data:

When you refer power sensor wizard, is this option (use external clamp for obtain data from Solaredge):

Thanks!

[Netrange (Steffen)]

Then it seems you only have a single-phase grid, right?
You need the assistant so that your ESS can obtain the measured values from the grid side and the current sensor.
Then you have to name this current sensor as a grid measurement in the console.
This is the only way your ESS can interpret the values correctly. Since you also have loads and PV inverters BEFORE the Multi, you need either an external meter or the current sensor. But if this is not known in the system… it won’t work.

I need to correct myself regarding the current sensor… you are using the current sensor for the main measurement and not for additional measurements for PV, etc…
So just connect the current sensor to the Multi… Sorry for the misunderstanding.

[joseberezo (JOSE)]

Thank you very much for your attention.

All it´s ok. So i need put this clamp to obtain values of inverters, because the data from modbus it isn´t ok.

I had visited the web of victron. I need this transformer and configure with the assistant. Ok?

Thank you very much. Good sunday!!

[Netrange (Steffen)]

You just need this …

Current Transformer for MultiPlus-II | Victron Energy

… and NO Assistant … read the Insatllation Instruction … very simple

??? Do you have a single-phase or three-phase power supply ???