ESS will not discharge battery

Question

question

glipschitz asked Dec 10, '23

ESS will not discharge battery

Hi brains trust,

I am having an issue where my battery will not go in to discharge in the ESS.

Victron MultiPlus II 48/5000/70.

Battery is showing all ok with no alarms in Victron and online

No alarms from the BMS

State of charge is 99%

ESS Settings all seem correct

Grid meter is reporting correctly

BMS is reporting that it is ready to discharge on both battery units connecting via RS232

I have run out of ideas on how to get this battery to discharge.

Battery units are 200AH 48v LiPoFe4 connected in Parallel via Lynx Distributor (400AH Total)

Anyone have any ideas as I am all out of them?

Thanks in advance!

Greg

ESS ess discharging

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Modifications Space

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Answer 1 · 2023-12-10T09:06:08Z

netrange answered · Dec 10, 2023 at 09:06 AM

Your Single Phase ESS must be connected to the L1 from your ESS Meter !

Change the wiring ... then of will works .

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Answer 2 · 2023-12-10T09:11:30Z

glipschitz answered · Dec 10, 2023 at 09:11 AM

Interesting @Netrange - thanks for that info.

I suspected that may have been the issue, however I thought it would also look at the total, rather than a specific phase.

I will try that out :)

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Answer 3 · 2023-12-10T09:23:30Z

glipschitz answered · Dec 10, 2023 at 09:23 AM

Ok, that has been corrected now @Netrange but still won't discharge

Any other ideas?

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Answer 4 · 2023-12-10T09:25:54Z

glipschitz answered · Dec 10, 2023 at 09:25 AM

Think I might just do a full power cycle on everything and start up the system from cold to see if that helps.

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Answer 5 · 2023-12-10T09:34:07Z

netrange answered · Dec 10, 2023 at 09:34 AM

Your Inverter-Mode is Inverting ? Is Power connected to the ACin or maybe a broken fuse ...

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glipschitz commented · Dec 10, 2023 at 09:35 AM

AC-In connected to Load

AC-Out 1 connected to Fronius Inverter in AC Coupled mode

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netrange glipschitz commented · Dec 10, 2023 at 09:37 AM

Check your Multi for working ACin in the Remote Console ... Status LED in the Picture below is OFF.

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glipschitz netrange commented · Dec 10, 2023 at 09:47 AM

AC In All looks good.

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glipschitz glipschitz commented · Dec 10, 2023 at 09:38 AM

It's in BULK at the moment

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Answer 6 · 2023-12-10T09:42:10Z

glipschitz answered · Dec 10, 2023 at 09:42 AM

There's a small cell imbalance which is coming down with the bulk absorption as expected.

Battery 1

Battery 2

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Answer 7 · 2023-12-10T09:47:40Z

ejrossouw answered · Dec 10, 2023 at 09:47 AM

What is your country code? If set to standard, it won't feed in.

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glipschitz commented · Dec 10, 2023 at 09:49 AM

I'm in Australia @ejrossouw

When you're referring to the country code, are you meaning for the grid?

It's currently set to Australia.

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ejrossouw glipschitz commented · Dec 10, 2023 at 10:01 AM

@glipschitz Yes, that is the one. I thought the devices were no longer certified for grid parallel use there? Is the grid meter in front of ALL the house loads and what is its defined role?

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glipschitz ejrossouw commented · Dec 10, 2023 at 10:05 AM

Yes, the grid meter is on the main AC feed for the property.

The defined role for the meter is "Grid"

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ejrossouw glipschitz commented · Dec 10, 2023 at 11:16 AM

@glipschitz I am not familiar with your meter, but know you have to configure the actual meter for single of three phase on some as well as maybe change multiphase regulation to per phase.

I'd be surprised if it makes a difference though.

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Answer 8 · 2023-12-10T09:54:58Z

netrange answered · Dec 10, 2023 at 09:54 AM

Check the "Parameter" from your Battery ... Maybe the DischargeCurrent ... DCL is Set to 0 ...

And a Warning Massage ?

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glipschitz commented · Dec 10, 2023 at 10:06 AM

That all looks good to me @Netrange

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Answer 9 · 2023-12-10T10:17:35Z

netrange answered · Dec 10, 2023 at 10:17 AM

Try to force the System to Feed In! . ESS ... GridSetPoint to negative ... Look if that works...

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glipschitz commented · Dec 10, 2023 at 10:25 AM

Nope, doesn't do anything. Tried that one earlier too.

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Answer 10 · 2023-12-10T10:32:21Z

netrange answered · Dec 10, 2023 at 10:32 AM

Maybe a Configuration Problem with the Shelly for a 3-phase konfiguration with your 1-phase System and the ESS Setup for "all phases" ?

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glipschitz commented · Dec 10, 2023 at 11:02 AM

Perhaps, although I am only using 1 phase on the energy meter and have this at L1 reporting to Victron correctly.

If it wasn't reporting correctly to the GX, then it wouldn't be feeding the data to VRM either.

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Answer 11 · 2023-12-10T10:43:31Z

netrange answered · Dec 10, 2023 at 10:43 AM

And take a look into the workaround...

https://community.victronenergy.com/questions/125793/shelly-3em-smartmeter-with-venusos-cerbo-gx.html

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glipschitz commented · Dec 10, 2023 at 10:55 AM

That is all based on Shelly EM3.

I am running Shelly Pro EM3. It's a completely different product.

I am running this code;

https://github.com/funkmaster86/dbus-shelly-pro-3em-smartmeter

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Answer 12 · 2023-12-10T12:55:33Z

glipschitz answered · Dec 10, 2023 at 12:55 PM

I'll order a Shelly EM (Single Phase Device) and see if that yields a better result.

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Answer 13 · 2023-12-10T21:20:43Z

glipschitz answered · Dec 10, 2023 at 09:20 PM

Perhaps @funkmaster86 can shed some light as to why the power meter isn't triggering the ESS as I am using his code from https://github.com/funkmaster86/dbus-shelly-pro-3em-smartmeter ? :)

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Answer 14 · 2023-12-10T21:31:05Z

glipschitz answered · Dec 10, 2023 at 09:31 PM

Interestingly, the VRM ID of the Victron EV Charger has a fixed ID of 40.

It seems that a power meter code ALSO has a default VRM ID of 40 which is seems to be what everyones dbus-shelly code injects the value into. Only picked up on this when the EV charger integration with home assistant didn't work because of the conflicting ID.

Changing the ID in the config.ini to be 940 for the Shelly Pro 3EM does change it in VRM, but, the ESS still does not trigger. Did fix the EV charger integration though.

The mystery continues....

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Answer 15 · 2023-12-12T00:42:11Z

glipschitz answered · Dec 12, 2023 at 12:42 AM

Still no luck after replacing the power meter.

I have gone back to the beginning and factory reset the GX and reinstalled the ESS.

The new power meter is showing up and reporting the grid power as expected

The VRM Instance is set to 41 being unique in the system

Data is showing correctly on the dashboard

Data is displaying correctly in VRM

Any ideas? I'm stumped!

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