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Constant draw from grid in MultiGrid Hybrid system

Hi all

I haven't got a lot of experience setting up Victron's in a hybrid system with grid connection, all of these systems within the company have been installed by a previous electrician who is no longer with us.

Have a site with a 3kVA MultiGrid, about 2kW of DC coupled solar and a futher 2-3kW of AC coupled solar on the grid side of the multiplus, and 10kWh of sealed lead acid batteries.

When the solar should be happily self-sufficient, i.e. solar supplying the loads in the house and charging the batteries, there is a constant draw of about 30-60W coming from the grid. While it's not a lot, at roughly 1.2kWh/day it certainly adds up across a week/month/year/lifetime of the system.

I suppose I'm just curious if this is considered 'normal' opertaion and what may be likely to cause a constant load like this? Seems strange that whatever it is can't be supplied by the PV/batteries.

Any help/ideas greatly appreciated.

Cheers,

Sam


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solarsam asked

0 Answers

Grid to grid ess

Hello I have a multiplusII with polytech batteries. I have dynamic prices that are different every hour. Also I have a second grid with a normal price plan. On this second grid I have cheaper prices sometimes then the first one with dynamic prices on some hours. Now I will charge the batteries with grid 2 and discharge then during peak hours on grid 1. Is it possible to put grid2 on AC1-out and grid1 on AC1-in and feed in from grid2 to grid1 ? This will prevent the losses for charging the batteries and vice versa. I found that you can connect AC1-out to an PV inverter of generator but grid2grid is nowhere discribed . Thanks for answering.

groovy asked
shaneyake commented ·

3 Answers

Multiplus II in parallel Multigrid I

Hi all.


Have a customer with 3kVa Multigrid I on the one site and a 3kVa Multiplus II on the other, he’s hoping to combine them at the one site for parallel output.

Is it possible to parallel these two models or are we going to have to get him a second MultiPlus II?


Thanks in advance

solarsam asked
Matthias Lange - DE answered ·

2 Answers

Use Solar 'overcapacity' to connect Mppt 100/20 Load to a grid-tie inverter

Since my camper is parked near my house, it seems a littiebit of a waste not to use the solar-panel for another purpose than solely keep my battery healthy. So I thought: When my battery is topped-up I want to be able to switch the output to my grid tie-inverter. I thought I could use the LOAD-output of the Mppt for this purpose. Is there anyone who did this? I it correct to do it? The product I have is the Victron SmartSolar 100/20 12V

harryt asked
harryt edited ·

1 Answer

mots de passe multiplus 2

rebonjour je repose ma question vue que la personne technique de chez victron a pas put resoudre mon probleme je recherche le code pour renisialisation vitron multiplus 2 et grid pour modifier le service technic ma donner un code mais marche pas !!! il me dit mauvais mots de pass donc il comprend pas !!!!

cali-clim asked
nico31 commented ·

7 Answers

Save critical loads when Multi fails

As my Multigrid didn't come back after a power outage (Error 11), the critical loads (fridge & heating) didn't come back on-line either. :o(

To avoid this in the future I do see two options

1. connect the critical loads to the grid an forget the UPS function

or

2. monitor grid down and grid recover and check if ACout1 is back after grid recover. In case ACout1 remains off, switch critical loads from ACout1 to Grid

Before I start developing...did anybody already create such a simple watch dog ?

vicky asked
Vasco Mendes commented ·

1 Answer

MultiGrid 24/3000/70-50 firmware v497 issue

Hi there,

With the latest firware version, I'm having an issue when uploading a different VEconfigure profile. I was able to change the profile without a system outage. With the latest firmware (and the version before it which I used for a week or so), when I change profiles the power is off for a few seconds. This creates an issue with getting everything rebooted and connected again. Is there something I can do to stop this from happening or do I just need to revert back to an older firmware.


I bit of of backend info if you care for it or you're wondering why I need to change profiles:

I'm running a 1380AH 24 V flooded lead acid battery bank. I need to equilize every 20 days ideally. To meet the battery manufactures specification or an equalisation charge I need to change the charge voltages from the regular absorption voltage. So I can it so the multigrid think its in bulk or absorp, but the voltage is set to equilise. I haven't figured out another way to do this without changing profiles every 20 days; the built in equalize feature of the multigrid doesn't work with the requirements of our system.


Regards,

UYV.


upperyv asked
denzel answered ·

1 Answer

Multiplus II ESS error 11 when generator is connected

Setup:

ESS Assistant (Europe)

Multiplus II 24/3000/70, Cerbo GX, MPPT 100/50, SmartShunt, LifePO4 210Ah 24V batteries

Feeding to Grid is not allowed

My idea was to install a automatic switch on the Multiplus input to switch between the grid and generator in case of grid failure.

The issue is that Multiplus gets an error

Error 11: Relay test fault on VE.Bus System when generator is connected to the input

Any Idea how to solve this issue?

mindaugas asked
mindaugas answered ·

2 Answers

How to connect MPPT 450/100 + LG Resu + Cerbo GX + Multiplus 2

I am trying to create a system that will save energy from solarpanels to my battery and also sell the energy from battery to the grid. I have followed the instructions regarding installing the LG Resu battery to the Cerbo GX. But when doing so, the MPPT "disconnected" (both the battery and the MPPT was connected to the VE.Can bus on the Cerbo GX). I have read the ESS instructions and other blog post. But I cannot get it to work. My questions are:


- Where do i connect the RJ45 cable from MPPT in the Cerbo GX? The instruction for the LG Resu battery tells me that I have to connect it to the VE. Can bus and then the MPTT "is disconnected".

- Which settings do I have to change to make it work?

Here is a picture of the current status of the installation.


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flex-max asked
nickdb answered ·

1 Answer

Multigrid 48/3000/35 replacement

Hi Victron,

We are looking forward to replacing our Victron multigrid 48/3000/35 due to faulty. Because this product is discontinued and we could not find anywhere in Australia.

Could you please give us a solution of replacing our inverter? Thinking of using Multiplus II but it is not in CEC approved list for using in Australia.

Could you please advise which Victron inverter that we can replace in our system to be compliant with Ergon Energy?

Best regards,

Prue

prue asked
prue answered ·

2 Answers

MultiGrid don't use MPPT when battery reached 100%

In my ESS-system a Fronius Symo 8.2 is at AC-in and a MPPT250/100 at AC-out. When DC feed-in is disabled and the battery has reached 100% no power comes from MPPT but all from the Fronius.

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Only when the Fronius no longer supplies sufficient power does the MPPT switch back on. This is how I lose feed-in remuneration. Is it possible to prefer MPPT-power for critical loads?

maha asked
Martin Gasthuber commented ·

1 Answer

DVCC limiting charging current - Multigrid, Venus, MPPT, Fronius and Pylontech

I`ve got an problem with DVCC on while charging the batteries. My system: Multigrid 48/3000/35-50 with Venus GX and two connected Pylontech US2000 Plus. A BlueSolar 150/35 is DC- connected to the Multigrid. My Fronius Primo 3.0-1 is AC- connected to the output 1 of the Multigrid. The gridmeter is an ET340. The system work fine. But if i activate DVCC the charging current will slow down to about 20A and the excess of energy is load to the grid. If i deactivate DVCC the full energy (about 30A) is load to the batteries. I want to load all the energy to the batteries. All firmware is up to date. Whats the problem?

moeterxl asked
alexander-uhde commented ·

4 Answers

Mutiplus mit grid

Hallo zusammen,

ich habe ein Problem den Multiplus richtig einzustellen. Versuche es jetzt schon tagelang ohne Erfolg.

Ich habe einen Multiplus+ cerbo+ MPPT von Victron + Batterie.

Einstellung ESS


Der Multiplus soll wenn die Batterie voll ist und freigegeben die Batterie nehmen und damit AC Lasten abdecken. Geht soweit.

Wenn aber die Batterie leer ist soll er einfach Strom aus dem Netz nehmen.

Es wird aber immer die Batterie zu geringen Teilen dann wieder voll geladen (ca. 8-10 W). So zieht er immer 12-20 W aus dem Netz. Das soll er nicht machen, sondern nur der MPPT wenn die Sonne scheint. Selbst wenn ich das Ladegerät in den EInstellungen ausschalte macht er es.

Was mache ich in der Einstellung falsch?


herour8 asked
herour8 answered ·

6 Answers

What happens with two Multiplus in parallel not linked with each other

Background: I have an old Multiplus 48/5000/70 and I would like to increase the available power with a second battery bank

I'd like to know what happens if I connect the output of a Multiplus to an existing grid formed by another Multiplus. Would it be any different if any or both of the Multiplus is a Multiplus II instead. note that in this example the two Multiplus would not be linked together in parallel, it cannot work as this would require a single battery bank.

Take this schema from the MultiGrid datasheet.

[image]

In this schema, Let's replace the MultiGrid by a Multiplus II (as I understand the Multiplus II is an improvement of the MultiGrid). Let's replace the PV inverter by another Multiplus and the PV array by a separate battery bank (that too has solar panels).

What would happen in such a scenario ?

edit: an answer below tells us that it's impossible to connect the output of two Multiplus together without linking them. But then, if the Multiplus is capable of feeding back current to its AC input, the second Multiplus can be connected via its AC input.

If it doesn't work by replacing the PV Inverter by a Multiplus, can I take the PV inverter and plug it to some batteries instead ?

Thank you

mildred asked
shaneyake commented ·

3 Answers

Off grid system upgrade, need another inverter/charger- with one should i go for?

Hello,
I need info what Inverter/Charger should i buy for my setup.
I have big problem that Victron Distributors won't help me at all.
They just never gets back to me...
What i have already is off grid 100%.

I have connected and running for many years;
EasySolar
15x : CS6P-250 panels
Powerbank: OPZS 130a 56V (2.25v batteries)
Mk3 to USB
BMV-700
Diesel power generator 8KW

What i dont have connected and i bought already:
10 panels JAM60S20-380/MR
Powerbank: OPZS 24V (2.25v batteries)

What i would like to do, connect new panels and new 24v powerbank would be nice to hook it up into 1phase so i could pull more power out of socket etc.

Help me please...

my inverter is:

https://imgur.com/a/zI1L1Ei

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Closed

magicmike asked
magicmike commented ·

4 Answers

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