After watching a video about overloads, I analyzed the VE. Bus Warnings and Alarms curves of my EasySolar 24/1600 (working with ESS assistant) in order to understand the repeated overload alarms that were recorded.

[image]

VRM Curves

[image]

According to the video, overload situations should happen when the inverter reaches the max output power.

Here my inverter turns into overload even when it is not at the max output power.

Is this normal?

link to the video: https://www.youtube.com/watch?v=4SXtGIx0x5w

Hi all I recently installed a 5k multiplus with a mppt 150/60

Ad did the ess as needed however my pv array comes on in the mornings to charge the battery's and ad soon as they are charged drop dow to 30 or 50w

And my full load is being pulled by the grid and nothing by the pvs

Please help me understand why

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!

Need a quick sanity check on the version of ET340 that supports US split phase (120v/240v).

Victron manual states that the following version is supported & for sale through them: EM24DINAV53DISX

When you look at the actual Carlo spec sheet the voltage ranges do not line up for split phase market.

AV5: 400VLL AC - 1/5 (10)A (CT connection) VLN : 160 V to 480VLN VLL : 277 V to 830VLL

AV2: 400VLLAC 10(65)A (direct connection) VLN : 113V to 265VLN VLL : 196V to 460VLL

I believe for split phase AV2 is needed - spec. sheet (linked to a reseller since the manufacture site is tough to navigate)

Accurate or am I misreading the sheet?

In addition I can find the AV5 for sale but not AV2 and I would need to use a CT sensor and AV2 appear to only support a shunt.

Anyone using the ET340 successfully in a 120/240V setup and measuring up to 65amps? If so what version and what is your setup?

Thanks

I am having challenges with a self consumption model in the following aspects

1. after installation of EM 112 meter and activating Zero feed in , the battery module discharges providing power to both AC out #1 and 2 instead of providing backup only to Critical loads and leading to a complete outage.

2. If i deactivate the EM 112 with Zero Feed in- the PV yield is considerably low as its only feeding the critical loads .

I have a 24/3000 multiplus and a Onan 5500 generator. While running ESS I can see the generator connected and the multiplus starts pulling power. I then increase load and all looks good, but whenever there is a spike in load, the generator disconnects from the multiplus.

I look at my Venus controller and the Active AC In put shows my generator has an input, 120v or so, and 60-62hz, but "Active AC Input" says Disconnected. After some time it will try to reconnect again, but then disconnect.

I have Incoming current limit set to 50 amps, I have turned UPS mode off and weak AC turn on in configuration app, but nothing seems to work. I even read up on some stuff with a ground relay but again, nothing has worked.

If I use the geneterator assistant instead of ESS, I can get the generator to run with passthrough, but even that sometimes has problems with the generator disconnecting.

Anyone else having issues with an Onan 5500. the model number is HGJAB

Thanks

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!

I have a grid-tie PV inverter, and an on-grid connected ESS setup. Right now my PV is parallel with the AC-In of my Multi, not the AC-Out, meaning it will not work in a blackout, which I would like to fix.

Typically, due to a number of reasons I won't go into detail, when operating on-grid using ESS, my battery SOC is kept at 100% during the daytime, until 2:00PM, at which point they discharge in tandem with the solar, selling back as much energy as possible.

When I say 100% SOC, that is my self-imposed limit, meaning my actual Lithium battery can charge up to 29.4V. My Multiplus is configured with an absorption voltage of 28.6 to extend the lifespan.

Battery is not connected using CANbus or other communication with the MultiPlus, it has its own internal BMS that can control the charge/discharge switch.

I am interested in knowing what will happen in this scenario: It is 12PM noon, the sun is the highest, and my PV interver is outputting its maximum. AC load is nearly 0, as nobody is home typically during the week, so all of that is going back to the grid. The grid fails, and all of that energy instead of going to the grid, then gets dumped into the batteries (this would be after I move the inverter to the AC-Out obviously). The batteries had already been at, what the MultiPlus thinks is 100% soc, and is at the maximum absorb voltage of 28.6, which, when 10Kw is dumped in, obviously starts to spike a bit.. Let's assume the PV inverter power isn't enough to make it rise above 29.4 when the BMS would step in the sever the connection, but does rise about 28.6V which is the maximum absorb voltage.. Will my MultiPlus trip in a DC over-voltage alarm? Or will it allow the energy to flow into the battery, raising the voltage above 28.6 for a short time until frequency shifting steps in?

I noticed that my Venus GX is recognising 3 Inverters but only the first 2 really existing. Any ideas how to remove the non existing inverter?

[image]

How can I disable charging from my phone?

I am away on holiday and the battery is going above it's max charge voltage.

[image]

I have set the maximum charge current to 0A but it is still charging.

[image]

[image]

Is there anything else I need to set?

[image]

Thanks

Ceri

Since this morning my one install is only charging batteries from PV and not any loads ,loads is stuck on grid feed . i have a gridd meter installed.

Can any one help with this ?

12 x 350 watt REC

1 x multipluss 2 5 KVA

10/7 freedom won

150/100 mppt.

I have had a Multigrid 48V 3kVa working flawlessly in an ESS system with a BYD battery for about 12 months.

A couple of days ago there was a power outage that lasted for over 6 hours.

The system stayed up during that time. When the mains grid power came back. The system switched over from inverter mode to pass through mode and stopped the discharging of the battery.

Why might this be?

[image]

I have a Quattro 15kVA in an ESS system. Continuous kW rating of the Quattro is 12kW.

I've noticed that when I draw above 12kW, the system almost immediately sources the balance of power from the grid, even though there is sufficient battery and solar capacity. I would have expected it to, for a limited period at least, be able to deliver up to 15kW?

I'm also curious as to whether this behaviour is being controlled by the inverter itself or by the ESS assistant?

Thanks.

Hi –

I have asked this question as part of another thread and received some valuable info from @ee21. I wanted to start a new thread in order to see if others had input OR if there are users who already have the following scenario in place successfully. I searched through the forum and have yet to find a posting on this scenario that involves a grid meter and zero feedback to grid.

I currently have a 48v DC coupled system:

PV > MPPT > BatteryBank > Inverter > 120v Isolated loads.

I would like to expand the system and support 120/240 loads, support a critical load panel, overall household load demand outside of panel with no grid feedback to the utility. Any excess PV production would go to the battery bank or a diversion load, ex. Water heater.

Visually it would be something like this:

[image]

The difference being there would be two inverters (Quattros 48/3000/120v) each connected to a grid meter(s). It appears from the information that I gathered to support both phases I would need either two ET112s (one for each phase) OR ET340 (use just two of the phases).

Equipment wise I think I need the following:

MPPT Controller (250/100) – Already have
BMV712 – Already have
2 x Quattro 48/3000/120v – Need
Color GX – Need
Grid Meter (ET112 or ET340) - Need
2 x RS485-USB cables – Need

Thoughts?

Has anyone done this with split phase (120/240v)?

Thanks

Please I want to know what a specific setup should be for a very common system setup using a Multi or Quarto

(Spain) Grid Feed in is not allowed

This has solar panels and batteries providing the inverter with power, the inverter output is constantly powering a domestic home, if the mains demand exceeds the Inverter capacity then it uses what it can from the inverter topping the demanded power mains from the Grid.

Only when the battery voltage drops to a pre-set level which is close too low battery level then the inverter starts to charge the batteries until a higher pre-set level is achieved then it stops charging, whilst still providing un-interrupted inverter power.

At the moment I can only seem to achieve a situation where the batteries are being charged all the time!

I have been able to set the Multi remotely uploading the file, Is it possible to have a flow chart for setup or screen shots for the setup?

Is it necessary to have a GX or CCGX do be able to do this setup, as some installations have a GX and some do not only the Inverter/chargers?

Is it possible to fool the system to think that a generator is connected and start charging the batteries and supplying an uninterrupted supply of electricity?

I use the Quattro 15kVA in ESS for exporting power to the grid. When upgraded its firmware to the latest revision 2656460.vff the ESS performance turned erratic. After setting the Grid Set point to say -3000W the unit constantly flips between charging and discharging states with no real power going to the Grid.

Had to revert back to 2656431.vff and it behaves normally.

Has anyone else seen this behavior with the latest firmware?

I have two quattro 8kVA's in parallel set to export excess PV to grid. This is all DC-coupled PV.

This works well, but I'd like to confirm the limitations of the system.

I intend to expand the system.

1.) Is the combined export to grid capability of the quattro's 16 kW or 6.5kW x2 = 13 kW at present?

2.) Observing the 1:1 rule, if I add 16kW of PV inverter capability on the quattros' output is the new export capability now 1.) plus 16kW?

Thank you.

Hi,

Is it possible to have mulitple EM24 meters for the PV, looking to use 3 meters.

1. for the Grid

2. PV system 1

3. PV system 2

If you change the Modbus address on each meter to be unique with there be any issues using this with the CCGX or is it only capable of reading one of the meters as the PV system.

In the ESS manual, it states that when an ESS assistant is added, PowerAssist will be ignored. However, I have found it is still possible to check the Power assist box and set an assistance level. Does anyone know if Powerassist is entirely ignored, where an ESS is setup for a Multiplus? So for an on-grid Multiplus-II 5KVA, we have a transfer switch for occasional charging from a small 2KVA generator. But when that 2KVA generator is operating, the inverter output to the residence would be effectively very limited, and possibly removed in favour of AC power from the generator, would it not? Without Powerassist being set to say 3.0, which is what I wish to do. Perhaps there is another way to approach that, too?

Is it possible (or recommended) to use ESS in an OFF-GRID system for a household, using the following components:

• AGM Lead-Acid batteries (in a hybrid li-ion / lead-acid battery system) but the system can see only the lead-acid battery side. So it is typically like having an AGM battery ONLY connected to the inverter (in case if you are not familiar with Hybrid li-ion/lead-acid batteries setup).
• Quattro 120V / 5000 VA
• Genset connected on AC in 1 with LOM Type B
• 48 V DC system

Using Quattro 5000 / 120 V with an updated firmware and ESS assistant for a 48V system.

We are facing the problem of while having a high AC load and there are no available solar Energy inputs so we are running purely on batteries "having ALWAYS a low battery warning LED flashing - and of course on the CCGX- even that the SOC of the battery from the BMV is higher than 90% and the voltage is ok as well"

1. is there a way to avoid this wrong indicator on the inverter?
   • Taking into account that the ESS settings for the dynamic battery control is modified already based on our battery type and the low voltage alarm reseat value for the inverter is set to 3 V (instead of 1.2 V default).
     
2. In case we have to live with this fake warning, How can we avoid getting this warning on the CCGX?

Appreciate your advice

I have a client that wanted a Multiplus 48/5000 but he wants to limit the inverters output power to 3000W. I did this under ESS, I am then however not able to use "Keep Batteries Charged" as the limited output is not available under this option.

The problem that I have is that the system does not have PV. Is there another option besides scheduled charging to get the batteries to charge from the grid?

I have a Multigrid with Venus gx and a BYD B-Box 5.0 and a ET340 meter.

I am a bit disappointed about the regulation quality of this setup. If I leave the "grid setpoint" at 50W I can see a lot of spikes below 0 while the Battery is discharged, meaning there is energy fed into the grid.

Tickling around 0 means I am buying energy at 28ct/kwh and seconds later I am selling the same energy for 12ct/kWh out of the battery. This is bad.

If I increase the grid setpoint to e.g. 100W this becomes better but it also means I am buying more energy than necessary. I get energy out of the grid which could also be supplied by the battery.

It becomes really bad when there is PV power available and the battery is charged. Leaving grid setpoint at 100W I get around 100W out of the grid even though there is enough PV power available to run all loads and to charge the battery. In fact the battery is partially charged out of the grid.

Setting grid setpoint to e.g. -100W would solve this. While PV power is available then there is some of it fed into the grid (around 100W) and the rest is used to charge the battery.

I really would like to prevent the situation that the battery is discharged and some of its energy goes to the grid and also the other way round that the battery is charged and nevertheless some energy is taken from the grid at the same time.

Would it be possible to get two setting of grid setpoint depending on charging/discharging the battery?

So when battery is charges set gridpoint to e.g. -100W to prevent any power taken from the grid.

When battery is discharged set it to +100W to prevent any power fed into the grid.

Thanks

Martin

I'm looking for a grid meter for use with Energy Storage System design. I live in the US, with split-phase 240VAC power, my home has 200A service, phase angle is 180*.

Would the Carlo Gavazzi EM24DINAV53DISX work? I wasn't sure since it's marketed as 230VAC 3-Phase compatible which is not available in the US.

Hello,

I have my system running scheduled charging (from grid) starting 8:00am until 10:30am.

[image]

I have seen periods where there is more than enough solar availability but it's not being inverted for charging and/or covering consumption:

[image]

as seen directly in the console:

[image]

and also as seen directly from the sky:

[image]

but after a while it goes back to normality and solar becomes main input

[image]

can anyone help to understand the reason this happens? It's very usual and I don't know how to limit it.

Thanks in advance.

[image]

System details :

• Victron MultiPlus 2
• DC MPTT coupled
• BYD battery
• Grid-tied
• Grid feedback NOT allowed
• DVCC enabled

I am using Scheduled Charging to prevent battery discharge during certain times of the day. "Stop on SOC" set to 50%.

As I understand the documentation, battery discharge is not allowed while the schedule is active.

And this is mostly true - I do not see "large" discharges from the batery.

However, I do observe a continuous, fluctuating "trickle" discharge while charge schedule is active. I easily lose 5% SOC to this in a +-6 hour period.

In the attached screenshot you can observe a 10W draw, while Scheduled Charging is active.

I do NOT see this when min SOC has been reached - then battery draw is zero, as expected.

So my question is, is this:

1. a software bug? (venus, mp2, byd BMS)
2. misconfiguration?
3. harware issue of some sort?
4. documentation omission?

Anybody else experiencing same? Not?

Having used ESS for a while now coupled with previous experiences with non-Victron software to optimal use batteries, being from South Africa, please find 2 suggestions.

Under the ESS menu, call it say i.e. Battery Use, where one can:
1) Set the a max AC watts that can be drawn from the batteries during daytime, linked to the the existing SOC.
2) A schedule for evening use of batteries, with these options:
2.1) the max AC watt that can be drawn from the batteries
2.2) with a pre-set SOC above the SOC the system uses, before reverting back to utility power,
2.3) with a pre-set time to start recharging the batteries.

Re. 1: One can then set a optimal "slow" discharge of your batteries, XYZwatts AC max, with peak loads taken up by the Grid during the day instead of pulling the max the batteries can give.

Re. 2: Between 12am and 6am draw a max of XYZwatts AC from the batteries to a pre-set SOC of XYZ% and only start recharging the batteries from 10am only.

During power failures the above settings are obviously ignored.

The core idea behind the above is to give users the option to not over strain the batteries during short burst of power needed daytime and the option to select when to use the batteries for even more savings, managing the recharge if one uses this option, as one knows that between X and Y times there tends to be spare power ... as per the data one has accumulated.

Thank you for reading, hope this could be considered.
Regards
Jaco Reinecke

Setting.pdfAssistant.PNGIMG-20190803-WA0000.jpgMultiplus Charger Inverter system Utility Power versus Solar system

Device List:

1. Color Control GX, V2.33
2. MultiPlus 48/5000/70-100, V430, ID 2624
3. BMV-700, V3.08
4. SmartSolar Charger MPPT 250/85, V1.39
5. 12 X 320W Solar Panels
6. 8pieces of 12V, 200AH AGM, configured for 48V Bank.

Philosophy:

The unit unit is to be connected to unreliable utility (grid) power, no feed in required, only to be use as alternative when there is no solar ray.

Use Solar to charge the battery bank and power the load during the day (as long as there is solar Power), the solar is to be prioritized above the utility power, however during the night, the utility power if available should charge the battery and power the house loads, same applied if during the day theres no solar ray strong enough and there is utility power

Challenge:

I have setup the system using assistant “self-consumption Hub 1” (not too sure this is the right way to configure to meet the philosophy), I observed that during the night when there is no solar ray and there is utility power, the inverter still continue to ignore the utility power and same during the day when there is reduce solar ray. Can the community help review my setup? Attached is the settings, the snippet of the remote console and the assistant summary.

Why is there no weather feed to CCGX so that the ESS can take weather into consideration when selecting how much the battery should discharge overnight?

Hi, I have 3 phase system with Quattro 48V/5000VA, 2 Victron LiFePO4 batteries( 25,6V/200Ah), running ESS with Fronius ongrid inverter connected at the AC input of Quattros. The meter is Carlo Gavazzi EM24(with CTs). The problem is that in case I'll set "Fronius zero feed in" to ON, PV production is reduced to the necessary load, but even when it is a lot of sun, the charging battery is limited very low or zero. In the case I switch off the zero feed in, it is working well, but I don't want to export a lot of power into the grid. It seems that the smart meter is faster than Quattro and first is ordered zero feed in and after that is not enough power to charge the battery.

[image]