Ja snap ik, je moet zoveel mogelijk zelf verbruiken
Dit is ook onze toekomst ben ik bang.
Neem aan Huib komt wel uit Nederland.
Grid setpoint is gelijk aan instelwaarde stroomnet?
Uiteraard anders heb ik geen zonneplan.
De standaard ess was een test voor 2027 en of ik nog meer batterijen nodig heb.
Trade mode levert inderdaad de meeste winst op maar de laad en ontladen verliezen zijn best behoorlijk. Ik heb in dvcc dan ook de maximale laadstroom beperkt op 150A en in ess de maximale omvormer vermogen op 7500W (ook ongeveer 150A) de kabels tussen accu en omvormers blijven daardoor aanmerkelijk kouder (35 ipv 58°C) waardoor het verlies beperkt blijft.
Mijn systeem (met 25% noodstroom instelling) kan dan in 2 uur vol en in 2 uur leeg zijn.
Ziet er goed uit 
Ja, om de verliezen te beperken, daarom heb ik laad en ontlaad vermogen ook begrenst.
Heb dat standaard op 30W staan, zet ik dess uit dan zal daardoor al je pv stroom opgeslagen worden.
Gebruik je stroom komt dit dan als eerste uit de batterij, ga je hoger dan 12kW-13kW plust het net het ontbrekende vermogen bij.
Maar als morgen het zonnetje schijnt, zet grid setpoint eens op 15k (alleen kort als test!!!), dan zal alle pv stroom opgeslagen worden en als de batterij meer kan opslaan de rest uit het net getrokken worden.
Zo kun je max opslag vermogen/stroom van je batterij testen, en kan je problemen aan die kant uitsluiten.
Zie in je diagrammen dat dess boven 7k PV het overschot gaat exporteren, volgens mij geen ideale situatie.
Je kunt beter als je energie over hebt dit in de avond exporteren.
Grid setpoint is gelijk aan instelwaarde stroomnet?
Als dess uit staat, bepaald het grid setpoint hoeveel watt je systeem importeert of exporteert.
Dus zet je het op 0W dan trekt je victron systeem 0W uit het net, en komt je verbruik 100% uit de batterij.
Wek je PV stroom op dan zal die 100% naar je batterij gaan.
Zet je grid setpoint op een x watt, dan probeert het victron systeem met laden of ontladen het setpoint stabiel te houden.
Dus zet je dit morgen als de zon schijnt die op 10k of zo en je PV wekt ook 10K op, dan zou batterij met 20k moeten gaan laden.
Stel je batterij kan maar 12k max laden, dan zal er 2k uit het net getrokken worden.
Met dit grid setpoint en dess uitgeschakeld kun je op deze manier je max batterij laadstroom testen.
Ja, in de Nederlandse taal “instelwaarde stroomnet”
From your screenshots, I would derrive that you have significant errors in all values of your system:
- When Sun comes out, your consumption completly vanishes. That indicates that your ac coupled pv is producing way more power than it reports to the gx device
- You almost always have feedin and gridpull appearing together, which indicates that you are using a non-saldiating grid meter, but have set the multiplus into multiphase balancing mode.
- But most important: Your grid total doesn’t align with the phase values. While the phases summed up are 0 (800, 400, -1200), your total is reported as -1400. This may also cause the consumption error instead of acpv.
So, you should fix these, then everything should be as expected i’d say.
The system consists of:
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3 Multiplus II 5000 units
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A Cerbo running firmware version 3.63
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4 16kW LiFePO₄ battery boxes
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An SMA 5000LT AC-coupled inverter connected to the AC out phase L1
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The entire load is on the AC out side
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Power measurement is performed by the Multiplus units
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So the difference between what is shown on the SMA inverter and what is projected by the VRM portal is very small.The negative Grid projection is same value as SMA inverter value
Solution: Install a power meter on the SMA or Grid and have it communicate with the Cerbo? Wat is your advise? -
Hereby I’m showing you the values that are set on my system, and indeed, in Belgium net metering is no longer allowed. However, I can’t find where to disable this in VeConfig. In ESS, it’s configured as three-phase combined.
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When you need more print screens let me know what values and I upload it in the chat
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Thx for the support
It now depends, on how the usual metering method of your Grid-Provider is.
The Multiplus measurement follows the Individual-Metering-Principle (Non-Saldating), that leads to the figures of having “bat2grid” and “grid2consumption” during night, as every phase is basically accounted individually.
If that is what matches your provider, you should set the Phase Balancing mode of ESS to “individual”, so the MPs are keeping each phase at 0 individually.
If your GridProvider is using a saldated measuring (i.e. L1=500, L2=-500 is considered “0”), then, getting a saldating meter like the EM540 would improve your values with regards to that issue.
Using an external Meter then will most likely also resolve the issue with the grid-total beeing wrong.
Then, for the SMA: yes, it would be usefull to integrate it’s power values into the system, so the MPs/gx exactly know what’s going on.
That can either happen with another meter just metering the SMA, or through any sort of API that could be queried, see here:
For DESS, these values are super important to be known, for scheduling as well as for selecting a proper reactive strategy to try to achieve the goal.
I’ve set the phase balancing mode of ESS to “individual” — see screenshot. Now the grid error has become even larger, and you can see that power is flowing to the grid. My SMA is connected via API — see screenshot. I’ve also added some more screenshots of settings in my previous message.
ThxFor the nice support
Erik
Configuration there says “AC Input 1”, according to your description you should set the inverter position to ACOUT in the gx menu.
Ps.: This is a community forum, no victron-support platform. So, i’m not supporting, i’m communitiing 
Check the wiring of the sma as well. The “0 consumption on L3” makes me strongly believe it is connected to L3 in reality.
Explains a lot!
I’m going to check the AC connection of the SMA, and I don’t know of any community forum where communication is this good. Thanks in advance for that!
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Hi, as dognose is writing, first solve the measurements. If I do the calculations based on what I see in your dashboard, you are missing PV measurement. Without proper measurement, calculations made by DESS can not be made and will fail. In normal ESS mode this doesn’t matter. Then it will follow grid setpoint.
All other settings don’t matter, they look good to me.
Hi
I’ve implemented the changes based on your advice. I kept the netting across the three phases as it is, since our electricity provider charges us based on the total sum of all three phases, not individually per phase.
The changes were applied the evening before yesterday, so the system has been operating with these settings for a full day.
Attached you’ll find today’s installation overview, along with the graphs from yesterday. As you can see, there’s still a significant amount of energy being fed into the grid. Yesterday’s solar forecast was slightly underestimated, so the battery could have discharged a bit more.
Best regards
Erik
Having the PV Inverter now available in the system is a good first step - however it will take the scheduler some time to really learn it’s production capability and therefore be able to predict solar more accurate.
The other thing is: DESS will most likely set a feedin restriction during negative hours. The system then will not feedin, but only IF the SMA is controllable through dynamic limiting.
If the SMA is “just running” and producing more power than your system currently needs, it will inevitably cause feedin.
Which venus OS version you are running on? From the continious feedin even mixed with grid2bat, I would assume it is 3.58 or older, where DESS was very strict on chargerates.
If that’s the case, upgrading to 3.60+ will make DESS (and the corresponding scheduler) way more smarter on “unexpected to-and-from-grid”.
Fourth thing to check: What kind of meter are you using? You wrote, your provider is using a saldated measuring, so that means, you should also get a saldating meter for your system. Else a non-saldating meter (or the multiplus measurement) will continiously log grid-pull and feedin due to individual phase-setpoints - but from your providers point of view, it’s not really happening.
If your sma is causing much feedin on phase 1 (say -3000), the MPs could charge the battery by pulling 3000 from grid on the other phases - and a non-saldating meter will contoniously tell you, that there’s simultaneous solar2grid and grid2bat, where in fact your grid is just sitting at a “saldated 0”.