Increase of self-consumption and zero feed-in export

Hi,


I have a solar kit which is supposed to increase self-consumption of energy and to supply the electricity in grid failure, which contains:

1x PV On-Grid (3-phase) inverter Solax X3 MIC 10.0

1x Multi Plus II 48/3000

4x Polyontech US2000 2.4kWh lithium batteries

1xCCGX Victron energy

1x patch cable for connecting battery with ccgx

1xInterface MK3-USB (VE.Bus to USB)

1xRS485 to USB interface

1xRJ45 3m patch cable

1xRJ45 10m patch cable

1xET340 energy meter

36 Trina PV modules of 280Wp

DC cables, dc breakers, mounting construction etc.


I wanted to know if I can use the system for the increase of self-consumption and as a back-up supply, where the PV on-grid inverter and the battery inverter does not feed into the grid.

I'm confused because we have only one energy meter and I don't know how to connect the Multi Plus II and the Solax On-Grid inverter to that energy meter.

Can someone help?



arianitz asked
DayAndNight edited ·

1 Answer

Advice with ESS system, external control and phase balancing

Hello, i am new on this forum. Professional experience with Modbus/TCP, comms, energy, MQTT and all relevant technologies but new with Victron.

Yesterday my installer finished a larger ESS system for my farm (16 pylontech batteries, 3x multiplus 5000, i have 3 solar production systems of total about 15kw, plus many consumption points to control).
MY ET340 is hundreds of meters from the battery installation (this is a quinta), so i cannot really run RS485. But for fine grain control i rather want to use the ESS system "semi dumb" anyway in that i can just use it as a great battery management system and fine tune/control the carging/discharging of the battery by MQTT or Modbus/TCP.

I see there is Modbus/TCP but the amount of writeable registers is rather small ... and i cannot see how i can command the multiplus inverters separately to draw or produce a certain amount of power (to both use the batteries efficiently as well as to do phase balancing).

Can someone help me with those ?

Johannes


jacola asked
jacola commented ·

2 Answers

MPPT 250 earth fault monitoring

In general I am very happy with your MPPT controllers, but I do have the same problem as the author of "Earth Fault Alarm Monitor in parallel to the MPPT250/100". Since there was no real solution within the answer, I suggest you built a monitoring system into the controller as all the grid inverter manufacturers do for the Australian market.

Ole Adebahr asked
mblowes answered ·

5 Answers

Victron ESS + ET112 = slow response

Hi,

Recently I've installed ET112 grid meter on my system (which was using CT sensor previously) and I've noticed that the Multi is very slow on response to load. Currently my system looks like this:

[image]

The grid set point is set to -10W. The multi needs a good 15-18 seconds to stabilize after large load kicks in and another approx 15s to stabilize after load drops off. Check the video from VenusGX (the load is switched on at about 16s of the clip and switched of at 43s of the clip):

Is that how it should be? The difference in the load is just about 1.4kW, why is it taking so long to handle that?

Previously I was using CT Sensor extended with Cat5e cable to over 25m long, the system looked like this:

[image]

The response to load was pretty much instant. I've recorder video using the same load as on the previous one (load switched on at about 10s and switched off at 23s of the video):

The system need seconds to stabilize

Also you can see a clear difference on the Grid use graph from VRM portal:

[image]

[image]

As you can see, with CT sensor the system is very close to grid set point, with ET112 grid meter it is way off and hardly ever stay close to set point. The situation is even worst during cloudy day when PV power is fluctuating (you cen see it on my other youtube video).

Is it normal behavior? It looks like Multi can handle this load easily, the problem seems to be in the feedback from the grid meter (or algorithm when ET112 is in use). Is there anything I can do to improve this reaction time??? Please advice.

Kind Regards

Mysik asked
Christian Dorst answered ·

6 Answers

Multiplus II ESS Mode 1 latency and limits

Hi folks,

I just installed a 3-phase ESS Mode 1 with 3 multiplus II 5000-70-50. Since there is a lot of PV installed yet, I decided to connect the PV on AC-Input, and installed an EM24. The installed battery is a pylontech US3000 rack with 2 stacks of 6 battery piles.

I got some error messages about high voltage, but found the information in the tutorial for pylontech batteries about 52V..

The reason I'm writing is the discharge behavior of the multiplus. The latency ist very high (serveral seconds for a load of about 2000W). I searched for a reason, and found a 400W per second limit referenced to the grid codes. Is there any posibility to adjust this value?

The software is up to date (2623474 on the multiplus und 2.54 on the venusGX).

Best regards

Christian

Christian Dorst asked
Christian Dorst commented ·

1 Answer

Do not display AC Out?

HI,

is it possible to remove AC OUT from showing up in the main screen of GX?

I do not have anything connected to AC OUT, but all my loads are connected and correctly shown as "Critical Loads".

My main annoyance with AC OUT Showing are:

- Takes up room on display without adding value

- Showing wrong information (nothing is connected, so there cannot be any loads, but it shows power consumption)


thanks

[image]


teemischer asked
Daniël Boekel (Victron Energy Staff) commented ·

2 Answers

Multiplus II ESS or Hub assistant configuration issue

Hey everyone I’m hoping you may be able to assist me in the correct configuration. It’s doing my head in trying to get it to work correctly.


I have the following setup.

2kw Solar to 150/85TR Smart solar

Multi-plus II 5000/48/70

Venus GX

500ah battery backup.

8aH load per 24hrs roughly


what I essentially want to achieve is that the solar runs loads and charges batteries to float during the day.

During the evening the load is powered by batteries down to 60%SOC (save capacity for grid outage) then reverts back to AC input to power the load and recharge the batteries to say 75% then the next day when the solar is back it gets the system back to float.


I know that the UPS function works seamlessly from bypass to Invert modes, but does it also work from invert back to bypass without dropping the loads? Is that even possible?


I have tried the ESS assistant and also Hub 1 and even the VS but it just doesn’t seem to work.

Any help would be greatly appreciated


cheers

Tim

TimSHinds asked
TimSHinds answered ·

2 Answers

system works like disabled phase compensation although, it is enabled, using 3xMultiplus2 on 3 different phases in ESS grid system, configured to switch as a group, each inverter on a different phase in 3 phase configuration

i installed 3x MP2 3000VA /48V. Updated Firmware to 2629474. made ve quick config, setted all settings. made the ess assistant in each MP. Now i try everything but the whole system acts like phase compensation is disabled although it is enabled. each inverter does only deliver so much power as required on the specific phase according to the grid meter. No idea why the compensation setting in the venus gx is not working. Please help!!

AC L1,L2,L3 is connected to MPNr.1-ACIN, MPNr2-ACIN, MPNr3-ACIN. The system is useless. If the electric car is plugged in on one phase with 7kW it only delivers max. 2.4kW from one inverter, if no other loads are switched on. If someone cooks on L2, i only get 2.4kW from the inverter on Nr.2.

I read all installation manuals, the training video on the Victron professional side, there is no hint what is wrong, looks like a software bug on the Venus gx!

[image]


[image]


gnagflow asked
gnagflow commented ·

3 Answers

Why CCGX cannot find VE.Bus?

I wonder if anyone can help me solve this riddle - I think something is broken:

Set-up: 2 x 10 kVA 48 V Quattro (2653433); CCGX (v2.54) ; 1 x SmartSolar Chargers MPPT (v1.06); 4 x BYD B-Pro 13.8kWh batteries and ESS with grid-tie enabled.

The Quattro and BYD batteries were working seamlessly together. but now they don't.

Quattro communicates with my computer but not from CCGX, sometimes works sometimes not, it confused me.

Resetting Quattro to default and reconnecting to CCGX as suggested by local distributor does not resolve the problem. Neither reconfiguring the Quattro.

The remote VEConfigure use to work but now fails during download: "

An error occurred during the downloading process.

Error Message: 'No VEBus product was found'

Error: mk2vsc-33" . I don't know what this means and have not been able to make it go away.

In desperation, I tried to re-upload the firmware. I did it without any issue.

I suspect these problems are related to one component malfunctioning most likely is the CCGX.

I would really appreciate any help.

Aydin Sadrzadeh asked
Aydin Sadrzadeh commented ·

1 Answer

Why did my battery die

Why did my battery die.

I'm asking this question to find out what went wrong and how to correctly maintain solar charging of AGM VRLA type batteries in a mobile scenario.

Setup purchased Dec 2018 (14 months old)

2 x HGL-120 -12 PRO SERIES EXIDE VRLA AGM.
1 x Victron 75/15 mppt
1 x Victron battery temp sence
1 x 100 watt solar panel.

Batteries are in parallel, charge cable from mppt is connected to + on one battery and - on the other.
The mppt settings from new have been, absorption 14.3v float 13.7v. Having some concerns over this near default setting about 3 months ago I changed these and made a new user defined standby setting which allowed the battery to achieve a float without major charge. info here

https://community.victronenergy.com/questions/29395/firmware-update-v142-causing-different-charging-ti.html?childToView=29432#comment-29432

The van has been used very little, 3 camping trips, a week each time and 10 other times overnight all with minimal discharge from a 45 watt fridge and a few other small gadgets.
January last was the third week trip to forster, it's then I noticed my discharge was more than normal down to 12.7v and charging back to float was hard to achieve, a bit concerned I started to wonder what was happening.
today with settings on default the voltage wouldn't rise above 14.1v and bulk charged up to 6 amps through the day, after chasing symptoms on line I physically checked the batteries and found the one without the victron temp sencer was hot hot hot, cooked. The other with temp sence was warmer than normal at 35 degc, I suspect it's been warming by leaking power to the dying one, I disconnected the batteries and checked voltage cold battery 13.19v the hot one was12.9v and checked an hour later 12.6v.

I must say I have spent hours of research trying to do everything for this not to happen and here I am, so I ask the question why did my batteries die.


Dan asked
dazey77 answered ·

6 Answers

Looking for UK ESS Installer domestic on grid - Cryodon

Hi all,

I'm looking for an installer for a pair of Multiplus II 5000 in parallel, 2 MPPT change controls, a Cerbo GX with on grid connection, rolls battery bank - ESS with profiles set up for:

Self consumption
Charge from grid
Sell to grid
Charge from grid with reduced current (for when on emergency generator)


Ideally with it being easy to swap profiles or target battery charges levels by ssh. (I can handle the software side of things, just need to profiles setup correctly)

This will also involve a new consumer unit and some other wiring, to I would assume 19th edition regs.

I don't have the hardware yet but happy to discuss fit only or fit and supply. Solar panels will already be in place and wired (via switched and fused combiners) to where controllers to be installed. Commissioning the batteries would also be preferred


Please let me know of if you or anyone you can recommend can install this - looking for install in the early summer - assuming the lock down is over.


Thanks

simon day asked
simon day commented ·

2 Answers

EasySolar ESS randomly switches charging-discharging mode

hi, when charging or discharging battery in ESS mode, EasySolar 48/3000 / 35-50 randomly switches mode - float / discharge, bulk / discharge ... This is repeated approximately once time in 3 minutes. Behavior is the same as at minimum power and at maximum power.


The strange behavior of the inverter is seen on the video


Firmware on all devices is updated. I use 1f grid meter and Fronius Primo in AC OUT, grid setpoint -20W. In several posts, a similar behavior of the inverter has been solved, it has always been solved by new firmware. I have the latest firmware - 433.

Please help me what to do, or if it is a standard behavior. Thanks Ondra


(I apologize for my English, I am not a native speaker )

Ondra asked
Stanislav Vávra commented ·

3 Answers

Building three phase ESS with Multiplus 5kW and Pylontech

Hi,


I am planning to install a ESS system according to the simplified schematic below combining 3 x Multiplus 5000VA for timeshifting energy and occasional backup duty. I hope I have gotten it right!


So my questions are,

1. What is the minimum battery requirement with Pylontech US2000 Plus batteries for this system? The Victron guide on Pylontech only covers off grid use which is more demanding compared to ESS. A breakdown of the requirement would also really help so I can think for myself next time :) Inrush currents have been mentioned before but I cannot find any numbers to base my decision on.

2. Can I add more US2000 Plus modules several years later even if they have different state of health?

3. Can I add other battery types in the same installation?


[image]


Regards,

Sven F

S_Forsberg asked
Guy Stewart (Victron Community Manager) commented ·

4 Answers

ESS without GX device?

I have a Multiplus a Venus and many other Victron sensors my questions is: Is it possible to used the MK3-USB to control the ESS command "Grid Set Point" on the Venus?If so, Can I avoid using the Venus to set the "grid set point"?

diego quintero asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

ESS + Pylontech + MaxDischargePower is not what I expect?

Hello,


I have a question how to understand the MaxDischargePower in an ESS context.

In my setup I have
- 2 Pylontech US2000 on a Multigrid-II
- not limited the inverter power on the Multigrid
- 50A Discharge Current Limit on the Pylontechs

and with this I see a "MaxDischargePower" on the MQTT service of +/-1949 W where my expectation would be somewhat higher around 2400 W.

It seems that this value is dynamically determined since it changes slightly when polling multiple times.


Thanks for any helping answer - kind regards - Volker

Volker asked
Volker edited ·

4 Answers

How to limit inverter power in ESS system

hello i am new to Victron

we have installed our first Victron system Quatro 10kva with 4 x 300 ah 12.8v Lithium batteries, the system is ESS with grid-connected and possible grid shortages during the day, and 11.52 kwp PV is installed and connected to the system through 2 x 250/150 MPPT chargers.

the situation is that during the midday 10 am-2 pm the solar is reaching 8000-9000 watt the load is about 5000w and since we activated the feedback to the grid so when the solar is high and the batteries are full the system is overloading since the solar is greater than the inverter 8000kw limit but as far as I know it is ok to oversize the inverter since it will cut off the extra power when it doesn't need it, but it is not doing it it is overloading and shutting down.


my question is that is there a situation where I can limit the solar in the setting that stops inverting more than 8000 watts so as not to overload the inverter ??

when batteries are not full it is ok since the excess solar is sent to the batteries and no issues but it is an issue when the batteries are full and feedback is activated the inverter keeps trying to invert the solar even if it is more than the 8 kW

eyub asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

ESS Konfiguration Deutschland

Hallo aus dem schönen ( leider kalten Rheinland-Pfalz)

Ich bin neu bei Victron-Community und möchte mein Projekt kurz vorstellen:

2 X 1200W Solar Panele ( OST/West)

1 X Easy-Solar-II GX

1 X MppT 250/70

4 AGM 12V/150AH

1 X Grid-Meter

1 X Color Control

Zur Zeit ist die Installation noch nicht fertig gestellt, die Solar-Panele sind aber schon installiert und der WR und die Batterien sind Provesorisch angeschlossen.

Mit der Configuration von ESS habe ich noch meine Probleme, hat jemand intersse sich mit mir Telefonisch auszutauschen um ESS zu Optimieren und vor allem um ESS überhaupt zum laufen zu bringen.

Leider hat mein Lieferant noch keine Schulung für ESS, wir haben Probleme das ESS zum laufen zu bringen.

Also wenn jemand Lust und Zeit würde ich mich freuen wenn wir uns etwas austauschen könnten.


Grüße

LayesP


Layesp asked
Layesp commented ·

4 Answers

Multiplus update requires GridCode for ESS

I purchased the Mk3 to USB and once connected I updated my Multiplus II firmware. To setup the ESS assistant I needed to go back to VEconfig. The problem is that VEconfig now states there is a firmware difference and a grid code is now required to use export. Can you provide the Australian grid code? Thanks

Catraz asked
Rob Duthie commented ·

1 Answer

ESS using power from grid when not expected

System setup = Quattro 15kVA, grid meter ET112, AC design with flexibility to move some loads between grid power (AC loads in ESS) and Inverter output (Critical Loads in ESS).

When I am running with loads split somewhat between AC loads and Critical loads, the system starts drawing power from grid when the total loads get to around 7-8kW.

When I am running with loads all on inverter output / critical loads, then it only start drawing from grid when the loading approaches 11-12kW.

Ambient temperature for both scenarios is less than 25 deg C.

It's almost as if the inverter does not feed back sufficient for the AC loads at higher loading when the reference is the ET112.

I have only observed this behaviour on the recent FW versions, not with 459.

Any idea what I can do other than keeping all loads on critical? As I only want to use grid power when approaching the overload limits of the Quattro, not well before this stage.


jgrimm77 asked
jgrimm77 commented ·

3 Answers

ESS why datamanager fronius by excess power

Hello,

Sorry for my english,i'm french.


I installer to:

- multiplus II 48/5000 with a genus GX

- Mppt 150/45

- lifepo4 400ah battery

- Fronius primo 5.0-1 I

would not do any network injections.

The PV inverter will be connected to the AC output. mppt directly on the batteries.

I would like to use the ESS zero injection function.

For my self-consumption to be optimal I would like to use the smart counter fronius at the level of the AC output of the victron to be able to use the solarweb to activate the inputs of the datamanager box on the are connected the relays and the pilot from the 'information "by excess power".

And so that the rest of the surplus is injected into the battery, before zero injection works.


So would it be possible to install the smart meter at the AC outlet of the victron without interfering with the ESS system?

Thank you nicolas

minico13580 asked

0 Answers

ESS with Grid meter function/control with backup power

We have been experiencing something interesting with the Grid meters, specifically the ET112 and ET340. At one of our sites we have a 5kVa Multiplus II, with the ET112 Meter connected on the input of the inverter (basically after the Main breaker from the Grid in the DB). Between the inverter and the meter is all the "non-essential loads".

On the output of the inverter is all the essential loads. We installed the meter to try and enable the Victron to back feed excess solar power to the "non-essential" loads, without back feeding to the grid. This worked great, but what happens in the evening intrigues me.

The battery power of the system gets "dumped" to the "non essentials" during the evening, leaving no power for the essentials to run on at night. The battery reached the discharge floor before 7 at night, but when we removed the Non essential loads from the meter, the battery discharged normally and last the whole night.

My Question is: how can we prevent the battery from being "dumped" back to the "non-essentials" and only allow the backup power to supply the essentials/inverter output. I have been scanning through the manuals but i do not see this mentioned anywhere. Can someone be so nice to assist? Please?

schalk@solarengineering asked
schalk@solarengineering commented ·

2 Answers

Feeding back to Grid with ESS

Mutliplus II 5kVA, 250/100 MPPT, 3,7kWh Solar MD battery.

EM24 meter installed, the battery constantly tries to zero out the grid input. Therefore the inverter is feeding back 3kW constantly.

Cbailoez asked

0 Answers

Multiplus - modbus - grid tie solar 3ph - use spare energy

Hi, I have a house with a 4kW GT system on FIT on phase A

I have added a 12kW array which I am planning to split over phase B and C.

I want to use a multiplus II as a smart inverter/charger from a lithium battery to store excess energy from any phase.

My supplier meter is net metering (non smart). So what I (think I) need is my own net metering meter which talks to the Multiplus and tells it to charge or discharge the battery to keep the import/export at zero. However this will only be pulling off one phase. This is why I need the external meter. If I am exporting 1kW on phase B and C (for example), with no import, but the Multiplus is on phase A, it can still import 2kW on phase A with no supplier charges.

I have researched Modbus meters but I just wondered if anyone had done anything similar - presumably I need an interface between the Modbus and the Multiplus to convert Net Export Power into Victron charge now Power.

I will have a zappi car charger and a DHW store system to soak up the excess energy. Ideally this would be priority order

1. Car (if present)

2. House batt

3. DHW cylinder

4. Export.

Although I would be willing to always do House first if that is less complicated (the zappi and DHW system will communicate internally but I don't know if they would communicate with the Victron).

I believe delays can be programmed such that the Victron could have a shorter delay on start up than the Zappi which would ensure the house batt gets priority over the car.

Of course as the car isn't always there I thought that would be best if the car got first dibs as hopefully if its a sunny day the house would get a chance later after the car leaves.

I should be good for producing approaching 16000kWh per year with this system (the 1year old original 4kW array made close to 4000 in a year and the 12kW array is less shaded)

My background is Marine - off grid so use a lot of Victron products. I have used R pi a bit so I guess this or Arduino could maybe be a useful interface if there isn't a premade solution available.

Thanks in advance

Olly

olly12383 asked
Catraz commented ·

2 Answers

Feature request: Dynamic Grid-Setpoint in ESS, based on top SOC.

Currently the Grid-Setpoint in ESS is a static number (in watts) that controls how much system power is allowed from grid, with the remaining load being served by incoming solar and/or battery capacity, down to a tolerable SOC. While that works great in the assumption of keeping batteries @100%, every day, it’s not so good for long-term health and maintenance of lithium batteries, in a (stable) grid-tied system.

I would like to suggest an upper limit to the SOC (other than default 100%), at which point the ESS would dynamically shift the load more/less (by changing Grid Setpoint) to charge the batteries when they’re below the high mark, and otherwise running the load off of solar or battery capacity, down to the existing minimum SOC (as normal)... or similar type of functionality.

Currently, I’m constantly changing the Grid Setpoint down, to serve the system loads from the incoming solar preferentially, as much as possible. Then resetting it up again at night, to keep the batteries above a reasonable SOC. While workable, it is way more manual than it needs to be.
I believe adding a simple top SOC to the algorithm that controls when to shift to using solar would greatly simplify and automate this process.

Geomz asked

0 Answers

Installation ESS / Easy-Solar 2

Ich bin am verzweifeln, ich bekomme an meiner Neuinstallation ESS nicht installiert.

Der Assisten läßt sich anwählen und übersetzen, dann komm aber schon direkt die Fehlermeldung:

Number of lines in the localized assistant text file for #System not as expected (Missing 1 lines)

Was bedeutet diese Fehlermeldung?

I'm desperate, I don't get ESS installed on my new installation.

The assistant can be selected and translated, but then the error message comes directly:

Number of lines in the localized assistant text file for #System not as expected (Missing 1 lines)

What does this error message mean?

                 

Grüße LayesP

Layesp asked

0 Answers

SOC jumps or stuck

Hi!

In few last weeks, there jumps up some problems in two of our installation.

Config:

1) 2phase - 2x Multi II 5000VA 48V, 9,6 kWh Lead-Carbon battery, 4,92 kWp, Smart Solar MPPT 150/85, Venus Gx

2) 3phase - 3x Multi II 3000AV 48V, 17,2 kWh Lead-Carbon battery, 7,2 kWp, Smart Solar MPPT 150/100, Venus Gx


these are not only installation with these batteries and we have no other problems, so I am certain, that the batteries parameters are set well.

there are 2 problems:

1) there are high jumps in SOC

2) once per 2-3 weeks the SOC stucks at some point and ESS stuck in float and system needs to be restarted to correct the SOC.


With our clients I have found out, that there is some weird behaviour, when the water pump or water level sensor (1) client doesn’t have water level sensor so it looks like, there is problem in water pump (230 V) which causing energy to returning to the system (it runs with the grid disconnecte). At the other client (2) I didn’t found problem in Water pump, but it looks like, the energy returns is caused by Water Level sensor.


Excuse my English please, I am better in reading then writing.


Thank You!

Stanislav Vávra asked
Stanislav Vávra commented ·

0 Answers

Mutliplus II + ET340 exporting power

Good day everyone,


I have a setup similar to this: https://community.victronenergy.com/questions/31886/et340-multiplus-ii-gx-and-external-non-critical-lo.html except my single multiplus II 5kVA is setup on L2 instead of L1. There is an ET340 to monitor the phases as well as non critical loads beween the meter and AC in of inverter.

The system is setup in ESS with solar. Unfortnately it is exporting power out to the grid on instead of zeroing that phase. I have tried turning phase compensation on and off to no avail.

I have tried all the settings I can think of to try stop it. Is it because I am using L2 and not L1?

speeddemon91 asked
stxShadow answered ·

1 Answer

Victron and Solar Edge - How to prevent AC voltage rise in ESS?

Hi!


Recently I have install a Solar Edge three-phase 15kW inverter, and After that I decide to add to one phase Victron Multiplus 5kW with solar charger Smart Soalar 250/60 with BYD and turn on Feed-in excess solar charger energy into the grid. (Solar Edge install on input of Victron). I though that this system will be work, but when Victron feed-in energy into the grid, the grid voltage increase above 250 volts and Solar Edge hight votage error occur. As alternative I deleted ESS assistant and turn on Victron as UPS, but in this case I cant use excess solar energy from Smart Solar.

Could you help me with this installation? Maybe anyone have the same problem?

Viktor asked
Alexandra commented ·

0 Answers

ESS assitant without GX device

I recently updated a four year old Multiplus hub system to run ESS assistant instead, but I just couldn't get it to discharge. I plugged in a CCGX and found in the ESS menu that external meter was selected, I deselected this, and everything was fine... until I removed the CCGX. Although it worked at first, after a moment, it seemed to forget that no grid meter was installed and went back to not discharging.


So my question is this; can you run the ESS assistant on a system without a GX device, as you could with the hub assistants?

Bob asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

ESS, Fronius zero feed in and grid setpoint negative setpoint without draining batteries?

Hi I have an ESS system where ive incorporated a fronius primo 8.2kW inverter i have all communication set up and working for zero feed in, however i want to allow export of 16 amps or 3.68kW as this is acceptable, I assumed i would be able to set the gridpoint to -3600 and it would allow the inverter to put upto this amount out onto the grid before limiting output. However the victron actually started pulling power from the batteries to export 3600 watts to the grid. Is there a way around this as the customer can actually gain a tarriff from exported units but it makes no sense to drain the batteries into the grid.

Thanks Jack

jacko asked
DayAndNight commented ·

2 Answers