Does anybody know an electro installateur who has experience in setting up an ESS (victron) for PV in Berlin?

My electro guy is a little afraid.

CCGX + multiplus 2 + pylontec 2000

Is any electrician capable of setting this up?

I have 2 100/30 Smartsolar MPPTs integrated with a Quattro 5000 into an ESS, running on 24V lithium batteries.

Everything had been working fine for weeks, but sometime this afternoon the system suddenly and inexplicably went into passthru. At the same time, the solar input dropped to zero.

There seems to be no way to take it out of that mode.

I tried disabling and reenabling the MPPT chargers

Restarting the CCGX

Changing the grid set point, and ESS mode, and Min SOC percentage

Updating the firmware on the MPPTs to the latest

All to no avail.

Ive already gone through the ESS manual (and the appropriate section in it often mentioned in this situation). But none of the presented situations seem to apply here. I do not have a grid tied inverter, do not feed power back to the grid, have the batteries at around 75% SOC and ESS is optimized without battery life. The batteries are managed by their own BMS and are perfectly able to take and deliver a charge.

If I kill the breaker for shore power the system will invert but if I reapply power, it quickly flows from discharging back to passthru.

Any help on this issue is greatly appreciated.

Thanks

Hello everyone,

I'm using 3 MultiGrid and Pylontech Battery without any load at the output. This setup has no particular purpose at this moment, but my task is to prepare a GUI for a communication between the Venus GX and a PC using Modbus. So I use ESS Mode 3. I'm frequently switching between ESS Keep Battery Charged Mode (to charge the battery when I'm away) and ESS External Control (to test and to run my Modbus GUI).

Both modes ran perfectly for about a month, which means I could charge and discharge the battery with energy from/to grid through Modbus communication. Until one day, on which the settings in MultiGrid might have been changed. Since that day, both modes don't work:

In ESS Mode 3, Venus GX doesn't react to the setpoint I sent, but data such as battery SOC can be read as usual. In Keep Battery Charged Mode, the battery is not charging, and most confusingly, these LEDs Mains On, Absorption and Inverter are on at the same time.

I've used Victron Toolkit App to understand this LED combination, but this combination is not available both in the app and the manual. How can these problems, or most importantly, the Keep Battery Charged problem could be solved?

Your help is highly appreciated. Thank you.

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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

Hello i updated the ess and now no feed in anymore.

feed in is enabled in the victron panel. i dont understand why it is not working anymore...

can someone tell me how to truble shoot this? i am happy to give more informaiton :D

hy all

i just want a confirmation about a wiring !

in a ess system with lithium battery and a vebus bms, multiplus, mppt (small one with no remote switch) and a color control gx.

i had anderstoud that the color control gx can control the mppt and in case of the vebus sand a faults, the colorcontrol will stop the mppt.

but after speaking with other guy, i'm not sure and i thinking that i have to had a battery protect to disconect the mppt because the vedirect of the mppt is already use !

can you confim this

best regards

Hi There,

Im having trouble with an ess system. When there is a power failure in the early afternoon, there is also still plenty solar power available. The problem is that freq shifting is not cutting back power fast enough on the gridtie inverter leading to overvoltages on the battery.

The setup consists of 10kWh lithium pack with 8kVA quattro and 4.4kWp of solar panels on a 4.6kVA solis. The system uses a ac current sensor to monitor pv production.

I have already tested with higher freq values, but still response times are too slow.

Is there a specific grid code which will work better. Currently i have nrs 097 selected.

Any suggestions on what im missing?

Initially power on the gridtie cuts back nicely, but then ramps up and continue to produce at max power until the battery or invertter switches off.

I moved my geysers and laundry appliances onto as yet unused AC-Out-2 on my Multiplus today in the hope that we could make better use of massive amounts of wasted solar I have because my critical loads are too small.

The MP2 manual lead me to believe that battery power would not be used to support loads on AC-Out-2:

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While unlikely that both geysers will turn on at the same time, and I could add a control device to ensure they don’t, pulling 50A out of a lead acid bank is probably not a good recipe for longevity.

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My ESS was configured with a minimum SoC of 80% but seeing the above I pushed that 95% and when the batteries hit that, the inverted backed off and the geysers drew direct from the grid.

What are my options to only support the loads on AC-Out-2 with available solar and leave the batteries to only support essential loads on AC-Out-1?

My MultiPlus II 48/3kva is configured with critical loads on AC-Out-1 and geysers and kitchen appliances of around 28A on AC-Out-2.

There is no energy meter being used as my understanding from the ESS YouTube webinar 2016 is that this is the preferred configuration.

This is late on a cloudy rainy day. Panels can produce up to 2300W from what I’ve seen in the week they’ve been connected.

I have seen screenshots where there is a separate box on Venus display for critical loads and another for AC loads. Per my screenshot below, I only have AC Loads.

How do I split out critical loads?

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I have full sun on 12 x 270W panels now at noon that were up to a combined 1300W much earlier this morning around 8am in partial sun but for the last few hours seem 'throttled' around 500W:

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Is it possible that the last 8% of the lead acid battery bank is being charged very slowly to prevent gassing or something?

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Charge mode is "Absorption" which I thought used as much current as possible?

Site at: https://vrm.victronenergy.com/installation/34733/share/07ef9055

Dear forum:

I have been exploring the web and seeing a lot of electrical diagrams for a Solar installation in a camper van, but non with the idea I had in mind, so I'm sharing my scheme.

My idea is to have 2 x 180W Solar panels serial conected to have 24v output connected to a MPPT solar controler to charge two 12v batteries (115Ah each, serial conected 24v total). I would like to be able to charge those batteries also with the van alternator, and someone in the forum suggested me to try the Orion DC to DC high power 12v to 24v 450W.

From there, control de batteries level witht he BMV 712 Smart, and some other components (see int the scheme) to have a 12v power line, an inverter to have 220v, etc.

I would appreciate a lot if anybody could comment on this, give me his/her opinion, It is my first electrical scheme, I know there might be some basic error (I'm not sure how to wire the Orion 12v to 24v to the alternator/starter battery and bank batteries), things to be corrected or improved.

All fuses and wire diameters still in process

THANK YOU VERY MUCH!!!

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i m using an ESS system, three phase, 2X BYD batteries 10 kW; PV area 9,6 kW, 3 X Multiplus 5 kVA and Fronius Symo 10 kW.

satisfied with more than one year from the installation of system; monitoring for long time with separate devices from VICTRON - i m using also Color GX from Victron as part of system.

for attached pictures, in a cloudy day, at the moment with sun on sky we can see that my house is using energy from grid also and in the same time is injected energy into the grid, even batteries are near empty.

as the ESS system is configured to feed battery first is appear that is not so optimised to do this job , and need some attention .

Can someone from Victron specialist explain what can be the reason of those graphs ?

clear in the another hand, my system is configured with minim injection on grid, approximately 30 W, because in configuration with 0W injection is became more unstable and energy injected on grid is bigger.

thank you,

laurentiu

i just updated all my sites and found on all of them its not keeping the AH setting .Is it only me ?

I have an ESS system with a Colour Control. There is DC coupled PV through an MPPT and also a DC coupled wind turbine through its own controller. The power from the wind turbine is displayed as DC Power. There are AC loads, critical loads and a grid meter.

The problem is that when I select "Has Grid Meter" then I can see the AC Loads and the Critical Loads in separate boxes but I lose the DC Power box. When I deselect "Has Grid Meter" then I can see the DC Loads box but I lose the Critical Loads box. In the image below I have shown what I would like to see; the AC Loads, the Critical Loads and the DC Loads.

Is it possible to achieve this at the minute? If not possible then can it be added to the list of feature requests please!

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Hello fellow installers,

We're about to set up a DC coupled ESS comprised of a Multi 5 kVA and a MPPT 250/100. So far we've been wiring ESS with an in-line topology, which is pretty straightforward, but in parallel, we got confused by the external CT and the relevance of using the AC-OUT 2. We couldn't find neither any specific wiring schematics detailing the various possible configurations when using a parallel topology. Feed-in is not tolerated, and we need to proceed with parallel wiring of the system, as the subscribed grid power of the customer is at 65A (~ 15 kVA), higher than the internal relay of the Multi. The wiring diagram would looks like this :

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Some remarks, for which we'd like to have confirmation from installer who have already installed ESS in parallel mode :

- First, the CT should be installed downstream, before the main switchboard, so that it can monitor the power drawed from the grid and thus prevent feed-in and matches the grid setpoint set in the GX, correct ? Problem is that it is rated for 32A max, if the loads draws more than that, the monitoring will not be precise and we need to use instead a ET112 @100A, correct ?

- Second, in normal operation, as the AC-IN line is bi-directionnal, all the switchboard will be energized both by the PV power from the DC bus from the Multi, AND the grid if needed right ? If the grid fails, only loads connected to ACOUT1 are still powered, correct ?

- In parallel topology, how we can use the AC-OUT 2 ? As all non critical loads are powered by AC-IN, what's the usefulness of having an AC OUT 2 which has no backup and which is limited to 32A ?

Thanks a lot folks !

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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This is a new installation and the first time I have done a PV system. and its been live two days now

• I have the PV 5000w solar inverter that will turn off by frequency at 53 Hz (this is changeable)
• The PV is connected to AC1 out
• Battery bank is Lithium Phosphate 48 Volts 10Kw
• Multiplus 48/5000-70
• Panel size 4.5Kw
• Grid connected to AC1 in

Problems I am having

1. I have turned off export to grid but export is still occurring
2. I have set battery charge limit to 1000w but I only want this to be if drawn from the grid if possible.
3. I have said yes to PV power in ESS and changed the frequ to off at 53hz
4. I cant see the Hz changing if I have excess PV power nor does the battery charge rate increase as all excess power is being exported, (even with export to grid set to off

Other bits I would like to do

I only want to charge or use all the solar during the day to charge the batteries and override the max charge rate rate if there is PV power available as the day progresses

otherwise everything is working well

More testing twomorrow

I am intending to buy a Multiplus II 3000VA GX.

With my 10 kWp installed Solar power and a 9 kW inverter, I will not meet the factor 1.0 requirement for AC coupling.

Can I still use a Multiplus II for ESS , even if it is not AC coupled ?

Can I connect the Multiplus grid-parallel in this case ?

What happens in case of grid-failure if connected grid-parallel ?

Can the Multiplus power the connected house phase in case of grid failure from the batteries then ?

Thanks much for your help.

Daniel

load indication on ccgx/venus in ess mode

it is not entirely clear how the loads are divided between AC loads and critical loads during ess mode.
in my case all loads are either on ac2 or ac1 output . which load is considered a critical load and which one is AC load

Is the critical load equivalent to what inverter is feeding?

and the remaining loads are termed AC loads which basically equal to Input from the grid - (PV inverter - Critical loads) ?

In a related question is there any way to separate thge loads on AC Out 1 and AC Out 2 in VRM .

In energymeter menu there is no possibility of selecting the location on the output side ?. I would be glad to put a separate EM340 on the load side and log it to VRM

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How can I display the critical loads and ac loads like in the pic below (pic from another user question)

I have Multi 24:3000 don’t have ess installed yet

I can not select grid code AUS/NZ grid code and have lom device,how can I select au/nz grid code or do I have to select other not complaint

Thanks

I tried to describe my problem in a file with drawn diagrams of my system. Please see the attachment.

Question1.pdf

Good day all .

I have a victron quattro 5kva setup with a mppt 250/100 and 10kwh of lithium batteries. Ac input 1 has mains electricity. Ac input 2 has generator input. Now with out the ess assistant geneator charges batteries and supplies loads through the inverter with no issues .

When i enable ess assistant the system functions with solar and grid energy as required. However should the user require generator to backup power or charge the battery the inverter will constantly flip on and off between charge and not charging . The relays will stay on for about 2 mins and off . Then on again then off again. To try all options we have disabled ups mode. And enabled weak ac input. This still doesn't make a difference. I can only assume that this has something to do with grid feed in which is set to grid type other with no feed in . Loss of mains on both ac input 1 and 2 is set to type b safe .

Would changing the type b to disabled on the ac input 2 correct this problem with no adverse effects on the 14kva generator input 2 ??

Or should i be looking for another solution .Thank you in advance for your help and assistance.

Hi Victron Community,

I am currently setting up a grid parallel ESS with a Multiplus 2, a Venus GX and two 5KWh Tesla Modules. I already have the Current Transformer/sensor (https://www.victronenergy.com/accessories/current-transformer-for-multiplus-ii ) for the Multiplus but no Energy Meter ET112.

Is my understanding correct, that

1. AC-In on the multiplus is bi-directional and can import to charge the batteries and export to power loads (I do not have any loads connected to AC-Out 1 or 2.)

2. I do not need to install the Energy Meter if I have the current transformer connected to the grid connection? (see picture below)

What changes to I have to make in my VE Config and ESS controls on the Venus to tell the Multiplus/Venus that the Current sensor is supposed to measure the import/export at the grid connection? I cannot see any options here apart from the tick-box in VE Config.

Any help would be much appreciated.

Any help would be greatly appreciated. Thank you, Phil

Schematics of my setup are below (except for the "No break loads, which I do not have):

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Hi Victron Community,

I am currently setting up a grid parallel ESS with a Multiplus 2, a Venus GX and two 5KWh Tesla (24V each) Modules in series. I will setup a BMS (SimpBMS) for the Batteries in the future but would like to use them beforehand (with restricted parameters of course to ensure that they don't under and overcharge ).

I am struggling to find a battery option in VE-Config and on the Venus Remote to tell the multiplus to charge/discharge the batteries according to voltage. All options in the ESS Assistants appear to be requiring a BMS communicating to the GX/Multi that batteries are charged/discharged.

Isn't there a simple option where I can set the Multiplus to charge the Batteries up to 48V max and invert down to 38V, for example?

After starting the ESS Assistant I have changed the inverter and charger settings in Ve-Config manually to the above (38V - 48V), but the system does not engage and appears to be waiting for a signal from a (non-existent) BMS.

Is there a "BMS off" or "No BMS" function (or similar) on the GX that I have overlooked? Any help would be much appreciated.

Many thanks

Schematics of my setup are below:

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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?

I am new to ESS hence the question. Is it possible to change ESS mode using an external switch input? Similar to the Winter mode switch in Hub 2. We have frequent occurrences of load shedding in South Africa so while I will be configuring the ESS system to run in optimized mode I would like someone to, with the use of a switch, to be able to switch to "Keep Batteries Charged" when loadshedding is announced/forecasted. I know I can play around with minimum SOC etc, but this used to be a quick and elegant way to do it in the past. No need to delve through menus to get to the setting.

Does anyone know how to get a quick daily view of my total consumption each day?

In the graphics at VRM I can see from hour to hour where all the power is coming from, but at the end of the day I would like to see a quick view with how many kwh’s total is used from battery, solar and direct and the feed-in kwh’s.

Running multi2 with lifepo4 in ESS

My system is Quattro/CCGX with 12nos. Aquion stacks (25kWh) and solar into GT inverters.

The Battery Life is set on however Aquion can sit discharged without harm. With winter charging there is little solar but SOC remains at 85% and voltage is only 40vdc. So the measurement must be wrong as bulk finished at 85% but the voltage is way down fully discharged. Should I re set something to get this back into correct measurement? I cannot force charge these batteries as they have high resistance but sitting at 40vdc I am only using grid power. A quick mains charge will bring voltage up over 50v and inverter will operate but voltage drops back and grid takes over with SOC still at 85%.

My system consists of 3 by 10kVA Quattro's, Venus, Fronius Grid tie inverter downstream of the Quattro's and a 15kVA diesel generator (3ph) connecyed directly to the Quarttro's. My battery is a Freedom Won 30/21 lithium Ion battery. The primary back-up supply is the Grid with secondary back-up the generator.

The Quatros are used to prevent grid feedback because my grid consuption meter consist of 3 single phase "impulse" meter that measure both forward and backward energy flow as consumption.

The battery management of the Freedom won battery does not always alow the battery to discharge the same SOC (State of charge). If the battery was not fully charged the previous day the minum state of charge is increased so that (I think) the averge state of charge is maintained at a specific level. This makes it difficult to use the state of charge setting to optimally start the generator when the grid fails and the batteries reach their minumum SOC.

If the generator starting is set to battery voltage - the generator starts irrespective of the actual battery voltage when the grid fails and irrespective if the sun is shining and I am harvesting energy from the sun! (Defeating the purpose of using the sun). and shuts the Fronius down.

What is the correct way to set this system up?

If I download all datat from VRM I see that there is a variable "#1 SOC Low" which changes to On just before the supply is changed from battery to grid. Is this not a variable that can be used to start the generator and then use say a SOC of 50% or some other value to switch the generator off.

How do you change from generator back to solar once solar is again avalable but the generator has not yet reached it switch-off value?

Please help?