ESS

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.

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

Hello,

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

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

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as seen directly in the console:

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and also as seen directly from the sky:

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

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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.

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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?

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

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

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.

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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

The system is configured with two 10K Quattros 120V/240V Split phase with 4 SmartSolar Charge controllers, a Lithium Battery with a CAN-bus BMS and it also has a Lynx Ion Shunt.

I would like to have a Smoke/Fire Alarm external NO or NC relay contact ask the Venus GX to put all Victron equipment is shutdown mode (Two Quattros and four SmartSolar) and if posible ask the BMS to shutdown the battery internal relay.

Is there a way to do with when ESS is been used.

Hello every one,

I want to use an ESS mode 3 System with 3 x Multiplus 2 48V/5000VA ( with an Fronius Symo 20 inverter (3 phases system) + ET340 Meter (installed just after the grid meter).

The multiplus just charge the battery's with the excess of solar production on AC side and discharge when there is no enough solar untill 50%SOC for example. It just help the grid.

I have a question about the wiring of the multiplus 2 in this case. If I want to use it in mode 3 (like an inverter/charger only, with just 1xAC wire), I have to wire it on AC-IN ?

Do you have some advices on this kind of system ?

Have a good day !

The ccgx says the ESS's charging current can be set to a percentage between 0 and 100, is it only possible when charging it via the grid? My intention is to "switch out" the charging of the ESS in favor of another charge when using only PV generation (0 power coming from the grid) in hours when the solar irradiance is scarce, is it possible? Thank you

Hi

Have just changed my victron/ Fronius from a parallel setup to Ac coupled. Added an ESS with keep batteries charged set, as they are gel batteries. Firmwares updatd to the latest

But once the batteries are full then the inverter turns ( green light turns on) on for a few seconds and uses battery power for a few seconds, then back to charging, and keeps repeating the cycle.

Any Ideas what is wrong.

In Belgium we still have an electrical grid monophase (only 2 cables coming in) without neutral. I think Norway uses this system too.

It is originating from 3 phase 3 x 230V Delta configuration, from which L1 and L2 are coming to the my meterbox. I imagine my neighbours will be on L2-L3 and L1-L3 to divide the grid load.

there is NO neutral wire.

Which Victron system could be used to provide ESS functionallity? I already have a grid-tied solarinstallation, and would like to expand with ESS capabilities.

all help is greatly appriciated

best regards

Stefaan De Ridder

Hello!

I am an electrician and planning a ESS-system for my new house in Austria.

3x Multiplus-II 5000 (3-phase) with 48V Lithium-Battery (maybe some Pylontech US3000), with about 6kWp Fronius Symo PV-Inverter connected on AC-Out for higher self-consumption and UPS in case of grid failure.

Is there an extra anti-islanding-relay necesarry, or is the anti-islanding-protection from the Multiplus II enough? I only find the TOR D4 Certificate for Multiplus-II 3000!

Thanks for the Answers!

Erwin

Hello,

System consists of 3 mppt's 150/70, 100/50. 75/15, 3kva multiplus, Venus gx and four 6v 377ah Trojan flooded batteries on ESS. Average daily discharge upto 70% SOC

I have set the manufacturer absorption voltage of 29.4 and maximum absorption time 4 hours in all the mppt's and the multiplus charger settings, but the absorption only reaches 28.6v and less than 4 hours. When I check the gravity of the cells at 100% SOC they are measuring 1.250 instead of 1.277 which means the batteries are under charged.

What can I do to rectify this problem?

Thanks

I have a Victron/Fronius zero-feed-in ESS system using high-cycle life AGM batteries. I want to use the top 20% for ESS and the bottom 80% in case of grid failure.

The batteries discharged to the set point (80%) and are basically staying there, despite there being plenty of excess solar capacity available, as well as the grid. Today it charged to 83%, but did this very slowly.

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Why would it be discharging the battery, in the middle of the day, when there is plenty of solar available? Should it not be charging to 100% while it can?

In fact the ve.bus state has been absorption ever since I activated ESS, never bulk. It would seem that if there is tons of PV and grid power available, and it's roughly the middle of the day, it should be bulk charging.

[image]

The Fronius inverters were automatically detected and are being controlled well by ESS. Feed-In sometimes overshoots but is corrected in under a second or so when loads change.

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ESS settings:

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The manual says this:

4.3.1 Mode
Optimized (with BatteryLife) and Optimized (without BatteryLife)
At times when there is excess PV power, the PV energy is stored in the battery. That stored energy is then used later, to power the loads at times when there is a shortage of PV power.

Maybe since it is limiting the Fronius' power for zero feed-in, it thinks there is no excess solar? is that possible?

Do I need to use charge windows to fix this?

Thanks!

I find conflicting information between the video and documentation about ESS.

The video suggests that for both marine and mobile ESS works. When shore/solar/generator power is removed it simply switches to storage which has been kept charged and available while alternate sources of power were available.

This sounds perfect for mobile installations. Do not have any need to feed the grid.

However in the documentation section 1. When not to use ESS. It simply states not in mobile or marine applications.

Only one of these should be correct. I need something for a mobile application similar to the first idea.

It seems ESS can when other power sources are unavailable use storage. When other power is available those sources are used and ESS keeps the storage system ready.

I don't care if ESS does not fit this need. It just seemed from the video it was a elegant and flexible solution. And that is what I am looking for.

I need management for a mobile system that has solar, storage, and shore/generator power usually available but not always. I wish to go off grid, have solar power during the day and battery at night. Maybe on bad days use a generator. When in town plug in to the shore power I am usually paying for.

Currently in place are twin Quattros producing 240V split phase. I want to always have the 240v split phase working. The are times, generator/30A shore where only single phase is available. As I understand it, one Quattro will use the shore power and the other storage/solar to generate split phase. Sometimes that will happen and hopefully not be an issue.

So looking for the best setup, assistant, or plan to keep my mobile system running well.

Thanks for any insight about the conflicting documentation and help,

Richard

I've got an ESS installation with a Multiplus C24/2000. At times the two leds "inverter" and "alarm" are blinking simultaneously. What does this mean? There is no information about that in the manual. Thanks

I am in the final stages of designing a battery backup system with the Multiplus II. The main purpose of the Multiplus II would be to have a backup power source for when the grid goes down. The Multiplus II would be fed from the grid to ensure the batteries remain fully charged. This would be the first stage of the install and gives me a very good indication of the power draw throughout the day for my critical loads.

The second part of the install would be to connect a PV system (MPPT) that would keep the batteries charged throughout the day. I would then allow a certain % discharge going into the evening. The PV array will be sized based on the power draw of the critical loads and the solar yield on an overcast day on the shortest day of the year (New Zealand - relatively high sunlight levels). On sunny days there will always be excess power available and I would like to dump the excess power into a hot water cylinder. I am looking at including the fronius Ohmpilot that would be connected to the AC-out (non critical load) of the Multiplus II. This way there will only be limited amount of power going back into the grid. I will only be installing the fronius smart meter and leaving out the Victron smart meter upstream of all the electrical loads as the fronius smart meter would be the only meter that needs to determine if the load is dumped into the hot water cylinder or if it is being exported back into the grid. I assume this is correct? Below is an overview of how I would like the final system to look:

[image]

I look forward to comments and feedback on the above.

Hi there,

Our system is as below

- 12 solar panels 250Wc Trina Solar

- 8 batteries AGM 250Ah each

- 1 Easysolar 48/5000

What we will like to do:

• Solar consumption priority, 100% self-consumption
• Call to AC grid when the battery voltage drops to 75% for 3 minutes and loads exceed 2000W, then reconnection when the battery voltage returns to 90% and loads below 1500W
• Battery protection: disconnect batteries when discharged at 35% , reconnection when 50%
• No battery charge by the AC grid only by the batteries

we have used the tool Virtual Switch to configure but when you download the configuration the system is showing that the system is "blocked" and no more power coming in/out of the easysolar.

also it's seems like ESS would be the right tool to use, but we don't have it in our assistant lists in VE configure, also how to deal with country code and other parameters ?

here below what's we have configured.

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we are little confused as our victron dealer can't help us since two weeks we are asking support from him

I hope getting a clear answer and procedure from victron support.

the matter is urgent as we are currently on site

many thanks for the support

Hello,

during the last days I observed a behavior of the Multiplus-II that I cuold not explain. Maybe someone else can:

- multiplus-II configured as ESS (Venus 2.20 + FW 450)
- battery is in float, 100% SoC
- stable energy surplus => grid feed-in (-500W or so)

Here I see short discharge pulses and (less frequent) charge pulses => see figures below.

Any idea why this is happening?

THanks & kind regards - tullsta

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Any idea why Fronius is restricting its output when the grid is missing even when soc is less than 90 %?

did I miss some setting?

with grid available, it produces on average 700 to 1200 watt to match my house load

Screenshots attached

checked following

1. Quattro frequency - exact 50.0 Hz

2. ESS debug menu - I charge = 140 amp. P charge limit = -1.0

3. PV input voltage present at Fronius terminal above V start almost 300 V

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Hi there,

Just installed an ESS system with a Multigrid II 3000, and a Fronius Primo 5.0 (on AC-in) (I know the 1-1 rule, but's running on the AC-in, so no problem).

Fronius is communicating with the ColorControl, everything looks fine. Enabled "Fronius zero feed-in", but the "Fronius zero-feed in active" remains "NO". It only works if installed on the AC-Out?

Any clue?

Thanks!

Pedro

I recently installed a three phase setup with three MultiPlus-II 48/3000/35 (fw 459) with four Pylontech US3000 battery modules.

Everything works. During normal loads ESS balances the grid setpoint and optimizes for self-consumption just fine. Now I discovered an unexpected behaviour regarding what happens when one of the Multis reaches it's load limit during grid connected inverter mode while the other two are not doing much at all.

What I expected:
When one Multi reaches it's load limit additional power is taken from the grid. ESS balances to the configured grid setpoint as the other two are able to provide additional energy.

What happens:
One Multi reaches it's load limit at 3000VA. Additional power is taken from the grid. The other two Multis are only providing their (very small) loads. Power is taken from the grid without balancing to the grid setpoint - energy is bought from the grid altought it could be taken from the battery.

My batteries can provide around 7000VA easily so this can not be the problem. Also the system balances out during normal operation just fine. Is this expected behaviour for ESS? If so, why? Makes no sense to me.

Good Day

I have a PYLONTECH 8kw 48V battery setup with a Victron Multiplus on ESS, connected to Solar.

One issue I have is that when the mains supply fails and am running on batteries at night, I cannot limit the level of discharge (batteries discharge below 80%).

I tried adjusting the dc input low shutdown on the Multiplus but did not work.

Please advise. I would to limit the battery to lowest 85% discharge level.