ESS

Planned: Multiplus-II + MPPT + Venus GX in ESS mode with grid feed-in. The house has a backup generator in case the grid fails which can be started manually, switching also manually from the grid to the generator.

Once the house is connected to the generator, can it be avoided that the Multiplus-II injects towards the generator?

I have not found an assistant or any other means to disable grid injection (towards the generator) and disable LOM (Loss Of Mains) detection based for example on a signal to AUX1 input. The signal can come from the same switch that selects grid or generator (with an additional circuit).

Is there a way to make this work with Victron-gear only? Of course without having to modify the ESS/Multiplus-II configuration manually before and after using the generator.

Can an external control (Raspberry) disable grid feed-in when the generator is connected?

Can the LOM detection be changed/disabled by an external control?

Or better bypass the Multiplus-II when the generator runs (and not charge batteries)?

A Quattro is not an option because of grid feed-in regulations.

Hi all,

my system consists of a multigrid 48/3000 with ccgx, smartmeter and a 12.8kWh battery storage from BYD, on the AC IN 1 a small PV is connected. It's all configured as ESS.

Further i have a on Grid micro chp on AC Out1 that should be switched off when the battery is full. So i config the K1 Relais to switch on 60% SOC and switch off 55,1V Batteryvoltage . The Problem is K1 do nothing ?!
Can it be the K1 only switches if no AC 1 is present in ? How can i solve the Problem ?
Or is the desired function only possible with the Relais of ccgx?

regards

Hi

I recently replaced an 8KVA Quattro for a 15KVA one, as my clients needs had been growing steadily recently. It is a monitored ESS system. Since its installation I am seeing regular overload warnings even though the loads are maximum 7KW. Often showing overloads at under 3000w. It shuts down at least once a day and did it again last night at midnight with a 1500w load. VRM data is giving me no indication of why it is doing this.

Anyone come across similar situation

HI

A quick question on ESS fuctionality.

I understand that in case of grid-failure an ESS system will automatically switch to inverter + battery mode.

However, what happens if the voltage of the grid simply drops to 150V for say 30 seconds, for example?? ... and then returns

Hello,

I have a ESS installation with feed back to the grid, on the CCGX i see the following;

[image]

It looks like the installation is feeding back on L3, users are at this moment on the L1 and L2 is this correct? or must be the grid feedback on L1?

Thanks in advantage for any answers.

Gr. Roel

I have a quarto 10Kw inverter with CGXColor Control and ....... The system was set to run on ESS with grid feedback. Run well for a year. Now I did the firmware updates for the devices and now all of a sudden my ESS settings are gone and the color control says "No ESS Assistant found".

It now runs straight from the grid not even using PV Charger supply as primary supply.

Can I get these settings somewhere (maybe a back-up?) or how do I get it that the control do find it?

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.

Hi there,

I have a site that is daily discharging the battery at night while exporting to the grid. How can I prevent this? There is no grid meter installed. Running ESS assistant with 10kWh Pylon Batteries. Many thanks :) Andre

[image]

I have a Easysolar 5000 with lead acid batteries and I can grid feed. I am running ESS with keep batteries charged. I have set the float voltage to 54V and the float voltage on the charge controller .4V higher. I have 5.28kWp PV installed, but the PV production only goes up to roughly 3kW at 10AM and then drops to 2.5kW till the late afternoon. When I discharge the batteries a bit the PV opens up but only until the batteries are charged again. The system rarely grid feeds more than 2kW. I have tried changing the ESS setting to optimized and cycling the batteries to 95% but the solar still doesn't open up. Grid setpoint set to -5500W. Tried with and without DVCC, no success. Any suggestions?

Is there a way to get the MultiPlus to power loads from the battery, during a specific daily schedule, even when solar power is already being fed to the grid? ESS has scheduled charging, I want scheduled inverting now. Would using ESS with grid setpoint to 0, using scheduling charging without adding PV inverter to Color Control GX work? All solar is parallel with the input of MultiPlus. No solar on the loads side, or on the batteries.

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 an ESS system with the following parts:

• 1 Multiplus II per 3 phases
• 1 Redflow 10kWh Zcell (wants regular full discharge ... 0% minSOC)
• 2 Victron MPPT
• 1 CCGX
• Grid meter
• Australian grid
• Don't want to charge battery from grid

We are finding some mornings after first light,
all Multiplus will switch off for around 10 seconds to 10 minutes.
Particularly if a large load was running (water pump).

I am guessing this is occurring when the Multiplus II are trying to hold all load on inverter as part of enabling feedin?

From my VRM data, it looks like this happens when:

MPPT voltage goes high
Battery SOC 0%
Battery dischage limit 0A

I would like to be able to set an ESS inverter restart minimum battery State of Charge, or for ESS not to enable inverter until a battery discharge limit is reached?

To work around this in the short term, I could run something on the ccgx:

1. Once the battery hits minimum SOC, the inverters are held off until a SOC is reached, through either:
   • MaxDischargePercentage
   • Raising the minSOC
2. Once this desired restartSOC is reached, revert the setting

Which would be the better approach? Or any other suggestions?

VRM Installation ID is 33453
A recorded example: 2019-05-29 06:42 local time

Cheers,

John

2 Quattro in 120/240 (first L1+N, second L2+N)

2 Fronius 120/240 in parallel (each has L1, L2, and N)

CCGX sees the Quattro as one system

CCGX sees the two Fronius as separate inverters

[image]

In the "PV Inverters" config I have to assign the PV inverters to a phase:

[image]

But of course this makes no sense, because both Fronius inverters operate across both phases.

I feel like this is throwing off the zero feed-in and phase compensation features, as well as the reporting.

If I go into one of the inverters to look at the power:

[image]

1575W is the total power that inverter is making on both phases. ESS is counting it all towards phase 2.

On Victron homepage I can find the certificate for Multiplus II 48/3000/35-32.

But not so for its bigger brother the Multiplus II 5000.

Is the Multiplus II 5000 certified for Spain according to RD1699/2011 and RD 413/2014 (anti islanding)?

As in its datasheet it is said so, will there be an certificate available soon?

Thanks and kind regards

Hi,

System Brief:

MP-II 3kW, MPPT Solar Charger (150/60) and a 225Ah 48V Battery, ET340 and ESS, system is configured without feed-in to the grid. The System is grid parallel and always connected in germany.

Is there any way with ESS to only power critical loads from the battery, aka. stop powering loads connected on the AC-IN of the MP-II and only power those at AC-1 once solar power is too low to sustain the AC-1 loads? Use case would be to use execess solar power for AC loads on the input of the multiplus but stop doing so once the system is on battery. The AC-1 loads should be always-on and powered from the MPPT and the battery.

Lukas

Multi 48/3000 in a easysolar . MPPT 150/70 - 200 A AGM bat @ 48V - BMV 700- Color control

Have set the virtual switch of the ESS on VE Configure.

have sent info and multi was reset.

But I do not see any ESS info on the Color control, nor soes it seem to have been "registered" .
Did I forget to do something to load the ESS settings in the system ?

Thanks

Has anyone noticed the ESS>Sceduled charging summaries are missing affter updating the Venus OS firmware from v2.23 to v2.30?

This is the ESS menu page with v2.23:

[image]

This is the ESS menu page with v2.30:

[image]

The schedules are enabled when viewed.

I've installed an ESS environment which compromises following components: MultiPlus II 5k (running fw 459), BYD Box Pro 7.5, CGGX with latest SW, EM24. I did all the settings recommended by the compatibility site. In general everything is working fine now .... accept that the system still draws small amounts of power from the grid. Please look at the red arrows on the next graph

[image]

What is this and how can I eliminate it? The battery has enough power and load to cover it. Look at the next graph showing the overall status taken at the same period of time.

[image]

[image]

So how to get rid of the 7% of remaining grid usage?

When charging the battery to 100% with multiplus and mppt it finally reaches absorption point. After 1Hr of absorption it stops charging and starts to discharge the battery into the grid.

I tried different things to stop it from happening,

- update newest firware tot the multi,

- update mppt,

- even downgrade the venusOS to 2.22 instead of the 2.23 i was running.

- pull out the mppt cable(maybe it sends faulty values, but it wasnt)

- resetted all devices..

it keeps discharging battery to grid. I have no clue what to do next...for now i disconnect the mains to stop it. Anyone who has an idea?

thanks in advance, Tommas

Setup:

multiplus

mppt75/50

RaspberryPI with venus image (ESS-optimized w/ battery life, feed-in allowed, 35% min. SOC)

bmv700

LiFePo4 25.6V 7kWh battery with 2-wire BMS

in the multi charger tab set the next values: (27.60V / 8cell = 3,45V/cell)

[image]

[image]

the curve is a little strange because of disconnecting the mains to stop it.

We have a three phase Multi setup. We mostly control it in external mode. Using the VE.Bus Quick Configure we diabled the loss of mains protection yet we observe this setting to be inherent. For any deviation in ROCOF greater than 0.2Hz/s, the multi's disconnect from the network. Could you please provide some further infroamtion on how this can be completely disabled? Is this a software bug or some additional settings need to be changed?