question

g320 avatar image

Gx doesn't discharge battery at night

Hi,

I'm new here, thank you for having me.
We are running a victron setup for a few weeks now. So not very experienced yet.
The setup we are using is 3 multiplus units (48/5000) for a 3 phase network (+ carlo gavazzi energy meter) and a mppt 450/100 unit as PV charger.

The problem is that the battery only discharges when the solar panels are charging the batteries.
When the battery has 74% at night, it will still have 74% the next morning.

Why doesn't it discharge in stead of using the grid?
Maybe a small setting but can't find it at the moment.


Thank you in advance!

Best regards

MPPT ControllersMultiplus-IIESS
2 comments
2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Hi @g320

Have you programmed the GX units yourself, or can you contact an installer??

What are you using to monitor battery state of charge, and how is it linked to the GX's?

Maybe attach a screen shot or summary of your ESS settings?

Hi Jesse,


Thank you for your reply.
We did the config ourself. In fact, we got a config file from the dealer.

The batteries are connected with VE can to the Multiplus II GX unit.

I'll try to drop a screenshot of the ESS settings.


Thank you

BR


12 Answers
marekp avatar image
marekp answered ·

@g320

If I understand you correctly, you have 3 GX units in your system.

The setup we are using is 3 gx units (48/5000) for a 3 phase network

You can only have one, so what did you do with the other 2?

Do you use ESS assistant?

If YES, is your system optimized with battery life?

Is your battery charged to no less than 80% during the day?

1 comment
2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Hi marekp,


Sorry, we have 3 multiplus units where one is the gx.
We do use the ESS assistant but the battery is charged to + 80%.
So I'll have look to the ESS.

Thank you for your reply.

marekp avatar image
marekp answered ·

@g320

I do not know if it is winter in your location, but in mine it is, and for the last 2 months there was not enough Sun to charge my battery to over 80% every day.

At the moment SOC of my battery is kept at 75% minimum because I use "battery life optimization" in my ESS assistant.

You can see it on my SOC graph from last 90 days.

screen-shot-2022-01-19-at-20939-pm.png


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

g320 avatar image
g320 answered ·

Please find the ESS overview below.

Should I enable powerassist?

schermafbeelding-2022-01-21-om-175421-1.png

Thank you in advance!


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

What are you setting in the ESS menu of the GX device?
Also make some screenshots of the overview page of the remote console.

PowerAssist is not available with ESS.

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

ejrossouw avatar image
ejrossouw answered ·

What are your settings on the GX for ESS?

b1e206ea-e25e-4508-8f10-e961ccfc2da4.jpeg


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

g320 avatar image
g320 answered ·

Some screenshots below

  • screenshot-20220124-082437.jpg



2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

g320 avatar image
g320 answered ·

2nd screenshot

It says "discharge disabled' but not possible to change the setting.

screenshot-20220124-082453.jpg



1 comment
2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

@g320

Try turning "battery life" off and see if battery is discharged down to 20%.

g320 avatar image
g320 answered ·

3rd screenshotscreenshot-20220124-082507.jpg


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

g320 avatar image
g320 answered ·

And here's a screenshot of the overview page. One during the day (pv active), one at night.

screenshot-20220117-143448.jpg


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

g320 avatar image
g320 answered ·

Overview at night (sorry for the dutch language)

screenshot-20220117-191017.jpg


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

Your active SOC limit is 80%.
It seems you don't have enough PV power to charge you batteries to 100% and due to "optimized with BatteryLife" the system raised the SOC limit to 80% to protect the battery.

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

g320 avatar image
g320 answered ·

Changed to "Optimized without Batterylife" and see if it discharges now. But looks like this will be the solution.

Thank you all in advance for the help.


Best regards

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.