Faulty 250/100 MPPT?

Question

question

Fideri asked Feb 29, '24

Faulty 250/100 MPPT?

Hi everyone,

I have two 250/100 and one 250/70 MPPTs connected to the Cerbo. They all have identical and the latest firmware v3.14. But I think one of my three chargers has a problem because:

1. When all 3 chargers are connected, they all show errors 39 and 87 on their respective displays. When the offending charger is removed, there are no errors shown.

2. Connecting the offending charger's PV array doesn't cause any errors.

3. When all three chargers are daisy-chained via VE Can, the Cerbo sees nothing. No errors are given. I haven't yet tried to remove the offending charger from the chain to see what happens. I'm now using VE Direct without the offending charger.

4. Although all 3 MPPTs are running identical firmware (3.14) and have identical settings, some settings in the offending charger are greyed out. On the remaining 2, equivalent settings are active. See photos for equalization settings. I find this strange though I don't use such settings.

The Victron seller has been unhelpful. He never responds.

The offending charger has serial number HQ2045W7UG8.

Fideri

PS: For some strange reason, I could only upload 1 of 2 photos.

MPPT SmartSolar VE.Can

bad.jpg (32.9 KiB)

2 |3000

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

Modifications Space

Node Red Space

Answer 1 · 2024-02-29T20:08:00Z

Fideri answered · Feb 29 at 08:08 PM

Here is the 2nd photo for contrast.

good.jpg (34.1 KiB)

2 |3000

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

Answer 2 · 2024-03-01T07:26:07Z

Alexandra answered · Mar 01 at 07:26 AM

@Fideri

It is possible you edited a different preset when programming.

Have you tried resetting to defaults? Then using lithium profile using expert mode from there?

Just FYI the equalisation voltage set is probably triggering the errors. So use a different preset.

5

2 |3000

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

Fideri commented · Mar 01 at 08:31 AM

@Alexandra

I will try a different preset to be sure though I don't normally touch the dials.

I tried a factory default reset without success.

I also didn't try expert mode; I will try it.

I didn't try VE Flash because I'm not familiar with it. I will try it if it applies to MPPTs.

F.

0 ·

Alexandra ♦ Fideri commented · Mar 01 at 08:33 AM

@Fideri

I was referring to editing a Preset in the app.

Ve flash applies to inverters. So not what you need.

0 ·

Fideri Alexandra ♦ commented · Mar 01 at 01:20 PM

@Alexandra

Noted, thanks.

To be on the safe side, I will adjust both the button and the app.

F.

0 ·

nickdb ♦♦ Fideri commented · Mar 01 at 01:26 PM

I had a weird one once where the selector dial wasn't seated correctly and was "rocking" between two presets. Caused weird behaviour.

You can reload the firmware file from victron connect as well, maybe it makes a difference.

0 ·

Fideri nickdb ♦♦ commented · Mar 01 at 05:53 PM

Thanks @nickdb . I will reload the firmware and look at the selector more closely.

F.

0 ·

Answer 3 · 2024-03-02T06:03:07Z

kevgermany answered · Mar 02 at 06:03 AM

How are the MPPTs connected to the Cerbo? If you have a mix of smart and cable networking, this is not supported and can cause strange errors.

1

2 |3000

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

Fideri commented · Mar 02 at 10:47 AM

@kevgermany
True. I think smart networking is not running. I prefer cable. I tried both VE Can and VE Direct (with the patch cables removed). But I will double check, just in case.

F.

0 ·

question