ESS

Hi there, we did an installation (VRM id c8df84cacf23), with:

16x REC N-Peak 315w

1x 150/45

1x 250/100

1x Multiplus II 5000VA

BYD-Box 10kWh

70mm2 battery cable (1,5m each)

All the loads are at the AC-Out, as the customer wants backup for everything.

"Off-grid" works perfectly for days, no problem. But with mains connected at the AC-in, there are problems running ESS .

What happens is that randomly (but it seems to happen mostly when loads are about ~2000w with the microwave on). Lighting starts blinking, so appliances go off (TV for example), and everything comes from the grid, then after some seconds the problem stops.

You can check this behavior here for example (customer . made monitoring system) : Out voltage (green line) goes down a lot (actually this is an average, it actually blinks), and it starts taking from the grid (red fill graph). There's no error coming at all.

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We checked the wiring, its brand new 3G6mm2, about 10m from to the inverter). Everything works perfectly "off-grid", or with the grid physically bypassing the inverter. With ESS, it turns into a random mess. Yesterday it even gave an overload error at 21:09, with only 2500w load.

Grid voltage is fine, frequency its fine, house runs perfectly with either only grid (bypassing the inverter with a switch), or off-grid, running from the inverter only.

Right now, its running off-grid mode, so it dont damage anything, but if you want I can tell the customer to turn on the grid, so you can check.

We also installed a similar system at the neighbour house (brothers), with a Multiplus II 3000 GX. We tried to mimic the same behavior, but no luck, even with ESS runs flawless.

Charge controller, Venus and Multiplus are all updated to last firmware version (actually it got worst with the last inverter update).

Checked all the wiring, and everything's fine.

Any help please?

Thanks

Hello! In a setup where grid feedback is not allowed, is it possible to have a single Multiplus or Multiplus II or similar installed on a single phase of a 3 phase network (230V), while having all or most of ESS features ? Will ESS phase compensation be possible without being able to feedback to the grid? If not, is this an issue? Many thanks!

Hi Guys,

I have reported this previously but this time I have the same issue with a site with solar - it's Quattro's running with ZCell (5 batteries) and ESS - ESS is saying recharge while the Quattro is discharging the battery - what is going on ?

Thanks,

Pieter

I could use some help defining the disconnect frequencies in ESS for my PV inverter shown here; any help is appreciated!:

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I live in the US, my inverter is 60Hz first off, these are default values I have not modified yet. My Inverter is a SolarEdge HD10000-H US. Active Power control via frequency is defined here in the manual, and can be set by the user:

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It would seem that "P0 in my inverter relates to "The solar converter will start reducing its output power at XX Hz", I am guessing that P1 would be the next setting "Output power will be reduced to minimum when frequency is at XX Hz".. I am not sure what to enter for the final disconnect value though. The full manual on Power Control can be found here, https://www.solaredge.com/sites/default/files/application_note_power_control_configuration.pdf

Can anyone provide any recommendation as to how I should configure this in ESS and which values should be selected for P0 and P1 in my inverter?

Good Day,

Im now running ESS. I see the The PV is making power but the Loads are been feed from either Grid or batteries

How can I use the Grid as my last option .

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Dear Community,

i am using MultiPlus II with Pylontech Battery and SmartSolar managed by VenusGX.

ESS is configured with phase compensation and everythin is working perfectly. But the maximum compensation is much lower than i expected (See picture). In maximum the batty is used with approx 17 Amp. I thought the maximum would be around 25 Amp. Any idea why it is not going above 18Amp?

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Thanks a lot!

Hello,

I have 300AHs of lithium storage, attached to a Quattro 5000/120V/24V, a pair of SmartSolar 100/30 controllers, and monitored by a BMV712, integrated into an ESS system.

Everything was working great until, for some reason yesterday, both mppt controllers suddenly stopped charging the batteries. I only noticed that because that behavior continued into the morning when I noticed there was no solar input even in bright daylight.

No matter what I did, I could not wake the controllers to start charging again. At that time battery SOC was ~40%.

Eventually through some combination of restarting the Quattro, disabling the chargers using VictronConnect, and unplugging the ve.direct cables I was able to get them to cooperate.

When I unplugged the ve.direct cables, they would eventually behave in standalone mode and begin bulking (although even that wasn’t working correctly as they vacillated from absorption to float. The battery voltage was nowhere near the set points for either state.

Plugging the ve.direct cables back in returned the controllers into their errant behavior.

At the time, the absorption light on the controllers was blinking... let’s call it sporadically.

I’d like to understand what happened. From what I can tell, somehow it thought the batteries reached absorption voltage (which they didn’t) the day before. And that errant behavior continued well into the morning when I had to “jiggle the settings”, as it were, to get it working again.

No grid power was involved (no AC in) in this scenario, running purely off batteries and solar.

Can someone explain this behavior to me?

I’ve included some VRM screenshots (from either controller, the same) showing the point it shutdown.

There were no errors reported on the CCGX or on the controllers themselves.

Thanks in advance for any help.

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Hi,

I recently posted questioning about how my electrician wired up the ET340 energy meter as it didn't work (he didn't connect the neutral to it). Now I'm questioning about something else he did. He said it was ok to wire an AC socket directly to the AC OUT 1 on the Multiplus II. I said does it need to go through something and he said no. I'm not an electrician, as you can tell, but I would have thought it might need to have something between the socket and the inverter?

My aim is to use the ESS and feedback the power from the batteries to the house via AC IN which I saw that @Sean said his does? Though I must admit, I still don't know how it does this. Why would it pull battery power rather than the grid, if the Multiplus is not sitting between the grid and the consumer unit. I know it says about using the meter to try to keep grid input at zero or thereabouts but how does it actually stop power flowing from the grid? If the grid is still directly connected to my consumer unit.

On the AC out, I just want to plug in my large freezer so it's continually powered if the grid goes hence the extra socket directly wired to the inverter..

Sorry quite a few questions there in the end.

Please can anyone offer any advice?

Thanks.

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Is there a possibility To control when the batteries will be charged by the solar, maybe a specific time or when PV is that the specific high. The batteries is currently being charged in the morning as soon as PV is available and is not used by the grid I will have excess pv later in the day then The batteries can be charged

Thanks

I need to run multiplus-II Gx in ESS system like the

herunder figure.

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I need also to have no enegy flux to the grid side (stupid regulatory requirements in FRANCE).

To meet this requirements i expect to adapt in "real" time the sink/source energy flux of the multiplus-ii Gx inverter charger is there a way to do that ?

Michel

Hi

i running a ESS (MultiGrid 48/3000 FW459, VenusGX FW v2.31with EM24) with AC Coupled third party PV Inverters (via ET340 and ET112) and a Smart Solar 150/35 v1.39 and a BYD B-Box 5.0kWh. (DVCC enabled, SVS disable, Smartsolar has BMS controlled)

The DC Coupled PV system is oriented south and could be enlarged by approx 900 Wp, since currently only 1,8kWp is installed. Maximum charge power to battery is limited at 2000W fixed due to the 35 Amps - i know ;).

In the ESS Settings I enable " Feed-in excess solar charger power" but soon i discovered the the typical behavior of the system was to charge from the East oriented AC Coupled inverters, which means, the the battery is full, sincce there is enough excess. But the south orientated DC coupled PV System was dearted by over 50% due to battery being at SOC 100%, even with the enable option of "feedin excess DC Power". Over have of the production of the south oriented DC coupled PV is derated (see pic attached, redline is potential solar production).

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To prove my hypotheses i changed the ESS Setpoint to activly discharge the battery into the grid, thus a lower SOC than 100% is realized. this enables the BMS controlled Smart Solar to use the full potential of the PV system. (previously 340W production goes up to 900W Production).

See my screenshots and notes

ESS Feed-in excess solar charger power - not full potenial.pdf

Conclusion:

I presume that the Mutligrid doesnt discharge/feedin as much power as the full potential of solar available on the DC side.

I would presume that the voltage Gap between SmartSolar and Multiplus isn't high enough for Multi to discharge the battery more but to keep it at 100% and though making it possible for the SmartSolar to feedin more of his potential solar power.

So propably i will not add any more Modules to the Smart Solar or install another SmartSolar, but install another PV Inverter AC coupled.

If anybody has the same Issue please let me know!

If anybody has an idea how to optimize the use of the DC coupled Solar to feed into the grid, please let me know! I thought already of an external PLC writing the ESS Setpoint into the Modbus register, to actively reduce the SOC during the daytime, to make more use of the DC coupled PV System.

THX

BR

Ossi

I have a Multiplus II GX system which is installed with the ESS application. It's connected to the UK grid via a single phase 100A supply, connected to AC IN of the Multiplus.

All loads and an AC coupled solar inverter are also connected to AC IN of the Multiplus.

The Multiplus is able to balance the grid supply close to zero, charging the batteries off of solar and discharging them as required. I also have time of use tariff which enables the Multiplus to charge the batteries over night.

The issue I have is that I run a lot of loads over night in the cheap period of my tariff including a 32A electric car charger. This regularly take my load over 50A.

The Multiplus needlessly regulates its own charger down in this period and on occasion supplements my grid supply from batteries. This is needless and results in me not having a full battery bank at the end of the cheap time-of-use period.

I can't increase the current limit beyond 50A on the Multiplus or seem to disable it. It is not needed in a parallel grid connection as I have it, as far as I can see.

Can somebody advise me as to whether I have missed a setting or if this is something Victron need to consider in a future firmware update. I want to be able to heat my water, charge my car, batter bank, run my dish and clothes washers during my off peak period!

The quattro is configured as ESS, the 3300ah battery bank is made up of 2v OPZ batteries and is reporting 98% charged, each battery has been tested and is charged to between 2.11 and 2.13.

The system has been operating flawlessly for nearly 2 years, then 2 days ago the power in the house kept coming on and then going off (during a period of around 15 seconds).

The Inverting light comes on for approx 15 seconds and then goes out followed immediately by the float light for 1 second, then all lights off for one second. This cycle then repeats indefinitely.

No errors have been reported by the CCGX.

Any idea's would be appreciated.

I have error 24 fault in an ESS system I’ve looked up the fault and it relates to current going through the back feed relay, surly in an ESS system the relay would be connected almost all of the time? It’s in a multi plus 2 I’ve attached and image of the install. Thanks

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I am having issues setting up a new victron multiplus II, 5kW connected with the venusGx, to be controlled from our own controller.

We have manged to setup and operate five identical devises up until now using the VEconfig and the victron connect applications, all working as expected with no issues whatsoever.

The first thing we do is to connect to venusGX via the mk3 to usb dongle and setup the ESS assistant simply by loading the same .var file we created for the first devise. After sending the assistant to the device and disconnecting from the venusGX if we connect using the victron connect software we can change the settings on the inverter so to fit our application. One of the setting to change is: settings/ ESS /mode -> External Control.

In one of our installations after everything is done in the same way, the ESS tab it just says no assistant found, so we cannot choose the option external control. It looks like the transfer of the assistant is not completed, with though being prompted that this may have been the case in any step of the process. ,

The only difference from every other commissioning, is that the PC used now is new and when installing the VEconfig software we are forced to update the app. If we don't we cannot load/create or send an assistant.

Do you have any idea what could be the issue? if we don't disable the external control the inverter immediately starts injecting power and does not respond to any of our commands, while we can communicate with it, reading values through modbus.

I am running a MultiPlus with ESS Assistant installed. I had charge current set to max in VEConfigure, but had Limit Charge Power turned on in ESS, along with Limit Inverter Power.

This had been working just fine until I had to remove the BMV-712 temporarily. When I did this, I turned on the Battery Monitor option in VEConfig for the MultiPlus. I set the Battery Monitor in Venus OS in System Setup to the MultiPlus. However, now whenever charging occurs, it is at the maximum current, not what I have set Limit Charge Power to. Can anyone explain why this does not work with the MultiPlus Battery Monitor, but Limit Inverter Power does?

I have installed a 3 kVA Multiplus, SmartSolar Charge controller, CCGX and Li-Ion battery, configured for ESS and Mode = Optimised(with BatteryLife). It is all working pretty well. My understanding is that when ESS mode = Optimise the system will use AC mains as last resort. However, in the morning when the panels are generating say 400W and the battery is starting to recover, a load of say 300W is fed directly from the AC mains and the PV yield of 400W all goes to charging the battery. This contradicts the above policy. This is not a big deal because as the yield increases, the PV panels drive the load as well as charge the battery and the AC consumption drops back to the +/- 60W we normally see. Does anyone have an idea of what is going on here ?

Dear all / Liebe alle,

please find attached some Screenshots to describe my questions / anbei ein paar Screenshots um meine Fragen konkreter stellen zu können:

Multiplus II & Color Control

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Battery Box shows only 8 % SOC, settings show 10 / 15 % i think (sorry, i am just an ordinäry person with very low knowledge on photovoltaics - learned by myself due to the fact that my contractual partner sold me something he could nor customize nor explain to me - now we are in a legal dispute and my Color Control shows strange things again) / Die Batterie Box zeigt nur noch 8 % Ladung an, die Einstellungen zeigen 10 oder 15 % an (sorry, ich bin absoluter Laie mit sehr rudimentärem Wissen zu Photovoltaik - in der Not angeeignet weil die Firma die mir die Anlage installiert hat sie nicht einstellen oder mir erklären kann - jetzt befinden wir uns im Rechtsstreit und mein Color Control zeigt mal wieder komische Dinge an)

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My questions are / Meine Fragen:

What indicates the blinking warning triangle on the top site right hand? That kind of makes me nervous - do i have to be nervous? / Was bedeutet das oben rechts blinkende Warndreieck? Das macht mich nervös - sollte ich nervös sein?

Why is on the first screenshot "ESS #1 #2" shown? I have only seen this while the remote connection was established for remote mainrenance? / Warum wird auf dem ersten Screenshot unter dem Multiplus "ESS #1 #2" angezeigt? Das Zeichen habe ich bisher nur einmal während einer Fernwartung gesehen.

Is my Battery now going to suffer / break / ...? The minimum SOC according to the Internet is 15 %, not 8 % or 10 %. / Wird meine Batterie jetzt Schaden nehmen? Lt. Internet ist der Mindestwert der Entladung 15 %, nicht 8 % oder 10 %.

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I hope someone could answer my questions and might offer some advise what to do until the legal dispute is solved and may have some experience if i should be worried about possible battery or system damage or not. Further background Information: the victron expert my contractual partner added to the system for customizing etc quitted the service since they changed settings without my konwledge which heated the solar chargers up to 56 degrees... / Ich hoffe hier kann jemand meine Fragen beantworten und hat vielleicht noch einen Rat für mich oder Erfahrung mit diesen Meldungen und weiss ob ich mir Sorgen machen muss um potentielle Schäden an der Batterie oder der Anlage. Zusätzliche Hintergrundinformationen: Die Victron Fachfirma welche mein Vertragspartner hinzuziehen musste für die Inbetriebnahme haben den Vollzugriff abgegeben nachdem Sie ohne mein Wissen Einstellungen der MPPTs geändert hatten, welche zu starker Erwärmung dieser führte mit ca 56 Grad Celsius.

Thanks a lot in advance and have a great day / Vielen lieben Dank im Voraus und einen schönen Tag

BR/Lg Sabrina

PS if your advise is that this all has to make me nervous i would be happy over the moon if you could recommend a Victron expert with additional knowledge to byd batteries around Germany - Thanks again :-) / Sollten mich die Meldungen ESS und Warndreieck objektiv betrachtet nervös machen, sprich, braucht es da einen Fachmann, wäre ich wahnsinnig dankbar über Empfehlungen von Victron Fachfirmen mit Erfahrung zu BYD-Batterien irgendwo hier in Deutschland. Nochmals vielen lieben Dank :-)

Hello everybody,

I'm trying to enable ESS Mode 3 with a Multiplus II GX.

In Ve Configure I set the GridCode and configured Inverter/Charger and added the Assistant "ESS".

I've send the settings to the Multiplus.

On the web interface of the CCGX unter Settings -> ESS is just shown "No ESS Assistant found".

Tried reboots and made a fw update to 2.33.

What did I wrong or what did I missed?

Final goal:

Have a "dump" bidirectional inverter for charging / discharging over Modbus like here:

https://www.victronenergy.com/live/ess:ess_mode_2_and_3

in Mode 3.

Hi, I tried ti find an answer to my problem reading 9 pages + grid failure filters but do not see wothming to help me.

My system is Multiplus 3000 + MPPT 150/45 + LG Resu 3.3 + CCGX + ESS . All software/firmware updated.

When there is a grid failure and IF my multiplus Inverter is running, I see the multiplus commutating immediatly to battery+solar mode to power on Ac out... Nice and no power vut in my house.

But if the grid failure comes when the Inverter is not running (pass-thru mode) AND the battery SOC is > to SOC min (even if SOC is min, I read that the SOC min is not follow for grid failure, correct ?), I get no more power on AC out , I mean the Multiplus is not running inverter and taking power from battery, even if I wait for several minutes... Should it no commute very fast to back up mode ?

Where is the problem ? Is there a Grid mode setting problem ? I'm in France and cannot use the French Grid mode because the multiplus has no internal ENS (VE config refuses this mode), so I tried with UK & German grid mode with LOM B, but same result = I turn OFF the grid on evening (no more solar) and no power goes from battery to my house...

Should I select the GRID "OTHER" mode ?

Many thanks for help or suggestions.

We did yesterday an installation (Fronius Symo at AC-in) with ET340 meter, 1x Multiplus II GX, 2x Multiplus II 3000VA (last version with M8 battery terminals), and 15kWh BYD. Updated the firmware of all the inverters to 2629. GX version is 2.3. Phase numbers and direction its fine, works fine "default mode", with the three inverters charging the batteries from the grid, and inverting, but with ESS, it syncronizes with the grid for about 1second, and goes back to ESS invert mode. There's no error at all at the Venus, no #11 error, nothing, no explanation why is behaving like that. Grid is "other", and mains voltage is perfect, about 227v 50.2Hz.

Any help?

Thanks!

Dear Community,

my multiplus is showing VE.Bus Error 8 and under VE.Bus Error 11 Report "Phase L1, device 1 (0) #141 0x24. Error Occured. GND Relay Error.

For debugging purpose, nothing is connected to AC-Out1 and AC-Out2.

AC-IN L1 is connected to L1,
AC-IN N is connected to N,
AC-IN Ground is connected to Ground,

Battery + and - are connected and Ground of Device is connected directly to House Earth Plug Busbar.

VE.Bus is connceted with RJ45 UTP to Venus GX. Is configured with ESS Assistant.

Actual Firmware already flashed: Version 465

The Device has worked 6 Month without Problem. I shut it off and a few days on agan and since then the problem exists.

Any suggestions what i can test? Me and two other electricians cant find a problem in my house.

Can it be a problem with the Ground Relay inside Multiplus?

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Thans for your Help!

what to use as an import export meter if main power supply is rated at 80 A per phase. ET340 meter is rated at max 65A per phase. is there a bigger meter there or meter where CT's can be used ? thank you

Good day all

I am trying to set my two EasySolar systems up to use the ESS function. However after installing the ESS assistants using VeConfigure, the inverters start flashing the low battery voltage led and then disconnect. My battery bank is sitting on 52v (Pylontech US3000) so there is no actual low voltage present.

My parameters for the ESS Assistant are as follows:

Country/Grid Code Standard : Other not compliant to any grid code standard (there is no option for South Africa in the live setup as given in the Fake Target With Full Options setup)

LOM Detection: Type B

Transfer Switch: Unchecked

Inverter Tab: Left on default

Charger Tab: Enable Charge selected; Absorption Voltage: 52.2V, Float Voltage: 52.00V, Charge Current: 50A Absorption time: 2 hrs

Battery system: System uses LiFePo4 with other type BMS

Battery capacity: 444 Ah (I have 12 x US3000 Pylontech batteries)

Sustain Voltage: 48V

Dynamic cut-off: 46V for 2c as per Victron/Pylontech reccommendations

Restart offset: left on default (1.20V above cut-off)

Pv Inverters: No

Can anyone assist with the solution to this problem?

Thank you and regards,

I have been asked a quizzer by someone looking to install a Victron Energy Storage System.

Here in South Africa, the mindset is very much about resilience to power failures, either as a result of local grid failure or "Load Shedding" by the national generating entity.

However, this person is an immigrant from Germany and they want a solution that optimises for reducing their expenditure on the utility even if that is at the expense of resilience to grid failure.

My thinking has always been: "Batteries are there to provide backup in the event of grid failure. Therefore you want them to be fully charged so they can keep things running as long as possible, ideally until the grid returns".

However, this person wants to make use of battery power during high demand periods in the day and charge them during low demand periods. They then want the batteries to supply power in the evening, again to reduce usage of the grid. I think there is some sense to this but I'm just feeling it with my fingertips.

To provide power in the evenings, by the end of the day, we will want the batteries fully charged. So, one might say that before 14h00 each day, the batteries can be used to supplement supply but only to 70% SoC. Below 70% or after 14h00, batteries must charge back to 100% before being used to supply again.

One might equally say that in the morning, the batteries must get back to 100% before they are used to supplement supply. That might only happen at 10h00. Thus, the batteries would be supplementing supply between 10h00 and 14h00 in that example.

Is something like this configuration possible with a Multiplus II 48/3000, Lithium Batteries and MPPTs?

Good Day,

Can someone guide me to setting an ESS for the the requirement below :

I have a grid feed (230v) into a 3000W Multi . I have 2*200ah batteries and Solar panels using MPPT charging .

I want to the following :

Use the power from the solar and batteries and use the grid

IF

the load required is more than eg :1500W automatically use the grid

IF NOT

User the Solar or batteries

IF

There is not enough power from the solar or batteries use the Grid .

Is this possible?

Regards

Hello! We have a situation of an unreliable grid with an essential load that requires backup.

We have installed a grid-connected backup system with solar array consisting of 1 x 10 kW Quattro, 1 x MPPT 250/100, 6 kWp solar array , Trojan 375 Ah @ 48VDC lead acid battery bank and CCGX. We have configured ESS and allowing feedback into the grid, set in mode "Optimized (with batterylife)" and "minimum SOC 100% (unless grid fails)". Battery monitor set to Quattro. Has no DC system. DVCC off. All loaded with latest FW.

The system is performing nicely most of the time, but about half the time they system restricts the solar yield to 0W and indicating on the display "ESS #1 #2" messages. Sometimes it actually cycles from restraining the solar for 100% , then allowing solar to generate, cranking up the solar, the ESS #1 #2 messages disappear and then the message appears again and solar is forced to zero W again.

The inverter works fine in case of grid failure, but it actually seems erratic behavior of the solar controller.

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In the below graph, solar is suddenly restrained while there is plenty of sun. The battery bank remains at 100% SOC. The system does not regenerate any error messages, except the status message "ESS #1 #2" on the CCGX display.

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I have a sense that there is a conflict between the inverter/charger battery charging protocol and the solar charging protocol, although the battery monitor has been set to "Quattro" (so the controllers are listening to CCGX, dictated by the Quattro, how I understand it). The reason I think there may be a conflict is the following: the battery voltage during daytime (solar power is available) is stable at 55V float voltage, while at night the battery voltage fluctuates between 50.5 V and 55 V.

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Q: What can cause the issue that the solar controller is constrained in producing power to feedback into the grid? What is causing the battery voltage to fluctuate in the night (controllers off) and in daytime it is constant? And what is allowing the solar about half the time to work without any issue? We are happy to share the VEconfig file in case required.

Thank you in advance for your insight!

Has anyone implemented a system other then the e-mail from VRM, to report that the grid is down?

The email is not very accurate.

I looking for a way to sent a whatsapp or similar.

Thanks for your help