question

henk-rademeyer avatar image
henk-rademeyer asked

Cerbo gx capacitor needed in 48V systems?

I recently learned about the capacitor that some install on the power of the cerbo on 48v systems,

I have the HQ2202 no capacitor on 48v system should I consider adding one and what are the specs I should look for in the capacitor?

cerbo gx
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10 Answers
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @Henk Rademeyer and others in this thread,

Please see here for the definitive statement on this issue;

2022-08 Cerbo GX power supply issue in 48V systems.pdf


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wkirby avatar image
wkirby answered ·

One of these ones:

1662830900240.png


1662830900240.png (20.6 KiB)
2 comments
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Warwick Bruce Chapman avatar image Warwick Bruce Chapman commented ·

Buy 1.0mm2 bootlace ferrules with 12mm pin length to make it all work.

We used part # 178-7305 at RS.

1662894653365.png

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1662894653365.png (1.2 MiB)
henk-rademeyer avatar image henk-rademeyer Warwick Bruce Chapman commented ·
Could not get both the capacitor and cable supplied with the cerbo to fit in a 1mm²
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jeanmarie avatar image
jeanmarie answered ·

check it here for example

https://community.victronenergy.com/questions/152325/cerbo-gx-geht-standig-kaputt.html

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henk-rademeyer avatar image
henk-rademeyer answered ·

Hi, I am struggling to get the mentioned ones. Attached is the one I can get easily but I don't know if it will work.JRA-85-Radial-Aluminum-Electrolytic-Capacitors.pdf







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michael66 avatar image
michael66 answered ·

I am also looking for this capacitor. I could get a 200yF / 100V or a 100yF / 63 V. I guess 63V is a bit to low for a 48V Batterie system? Would 200 yF work as well?

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k-k avatar image k-k commented ·

i think the 200uF/100V would be better, because it should handle a higher inrush current. Reminder: use industrial grade ones and look for a wide temperature range: 85°C or more for longevity.

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henk-rademeyer avatar image
henk-rademeyer answered ·

I found this document and on the bottom it states that you should not use a low ESR capacitor, how do you determine the ESR?

2022-08 Cerbo GX power supply issue in 48V systems - v5.pdf



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wkirby avatar image wkirby ♦♦ commented ·
If it is a low. ESR type, then the ESR value of the capacitor will be stated in its datasheet, you linked this in a previous post.

If an ESR value is not stated then it is most likely a more standard capacitor, not specifically a low ESR type.

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Warwick Bruce Chapman avatar image Warwick Bruce Chapman commented ·
Henk if you are in South Africa, I can help you with some - we brought the specified model in from Europe and we brought in the right bootlace ferrules to rework the cable.
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henk-rademeyer avatar image
henk-rademeyer answered ·

Thank you all for your assistance I will get the cap installed asap.


I would like to suggest to @Guy Stewart (Victron Community Manager) to include the requirements of the capacitor on 48v systems in the online manual of the cerbo gx to increase awareness of the requirements.

2 comments
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Thanks and noted @Henk Rademeyer - there will be a follow up announcement shortly on this issue with more detailed and specific information.

Thankfully the affected units are not as widespread as initially thought.

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Warwick Bruce Chapman avatar image Warwick Bruce Chapman Guy Stewart (Victron Community Manager) ♦♦ commented ·

Watching out for this.

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PeterM avatar image
PeterM answered ·

Has this problem been rectified for current production yet. Prefer to wait unitil this is sorted out properly before I upgrade to Cerbo. Supplier her is SA still selling units without even mentioning this issue. When I asked why they are selling them without modification kit they said they have never had a problem.

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Hi @Merle.Peter,

Adding the capacitor is no longer necessary with serial numbers that start with HQ2221 or higher.

Most installers will likely not have a problem even with the old stock - it was only in some specific configurations, less than 1%. However in those installation situations where it did present, it would need to addressed or would re-occur with a replacement (due to that installations specific characteristics).

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PeterM avatar image PeterM Guy Stewart (Victron Community Manager) ♦♦ commented ·
Thanks Guy , new stock in South Africa is still at 2217


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jfbo37 avatar image jfbo37 Guy Stewart (Victron Community Manager) ♦♦ commented ·

Only Serial numbers: HQ2201xxxxx up to HQ2220xxxx are concerned to add this capacitor 100uF ?

I just buy an HQ2248xxxx, so i'm not concerns by this capacitor ?


thanks

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tgo avatar image
tgo answered ·

Hallo, bin gerade über den Artikel gestolpert, und froh daß ich meinen Cerbo GX noch nicht in Betrieb genommen habe. O.K. Hinweise wie: "Les doch mal das Handbuch" brauche ich nicht zwingend, da bin ich schon dran!

Trotzdem habe eine Verständnisfrage die jemand der schon tiefer drin ist vielleicht leicht beantworten kann: Cerbo GX ist gemäß Beschriftung zwischen 8 und 70V DC zu betreiben - der Einfachkeit halber wohl direkt am Akku, soweit so gut!

Mein Akku hat 16* 3,2V LiFePo4 => bis max. 56,8V und damit ist das Cerbo GX bei mir "Kondensatorverdächtig" gemäß diesem Thread, denn es hat eine Seriennummer HQ2203*.

Stört es den Cerbo GX wenn ich ihn in diesem System an eine 12V Quelle hänge oder braucht er unbedingt die selbe Spannung wie der Akku um seinen Dienst (korrekt) zu tun?
Wie hoch wäre der Strombedarf (Ampere) bei 12V (oder steht das auch im Handbuch?)?

Ist mit dem 100µF Kondensator wirklich alles erschlagen? Sowas habe ich in der "Wühlkiste", daran sollte es nicht scheitern, aber ich gehe lieber in der Spannung runter wenn das für das Gerät irgendwie besser ist! Gibt es da vielleicht (auch) eine Offizielle Ansage von Victron dazu?


Würde mich über eine brauchbare Antwort freuen!


Gruß TGO

P.S.: Ich hoffe es ist in Ordnung wenn ich auf Deutsch frage - auch wenn hier alles Englisch war, Antworten auf Englisch sind mir ebenso willkommen!

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jeanmarie avatar image
jeanmarie answered ·

Die Verwendung eines 100uF-Kondensators löst das Problem der Ausfälle, ja, und glücklicherweise auch, denn sonst würde Victron tonnenweise CerboGX zurückbekommen.

Ich habe noch nie davon gehört, dass es von Vorteil ist, 12 V im Vergleich zu 48 V anzuschließen.


Für den Verbrauch bei 12V ist der Strom nur 4x so hoch wie bei 48V ;)
Stromverbrauch eines CerboGX bei 48 V: 0,2 - 0,3 A, d. h. bei 12 V verbraucht er etwas mehr als 1 A.

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