2 x Skylla-i 24/80A 1+1 battery chargers connected in parallel - possible bug?

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raymond asked May 12, '24

2 x Skylla-i 24/80A 1+1 battery chargers connected in parallel - possible bug?

Hi All,

I have 2 x Skylla-i 24/80A 1+1 output battery chargers (Firmware version v2.07) connected in parallel, 1 x Cerbo GX (Firmware version v3.31) and 1 x Skylla-i Control (Firmware version v2.01) connected to a battery bank.

1 – both Skylla chargers work as expected when used individually, no problem.

2 – but, when connected in parallel (the LEDs on both units flicker), the charge current seems to be similar than that of a single unit, when one would expect it to be double.

The shore current on the Skylla-i Control and Cerbo GX cannot be set higher than 16A (the maximum of a single unit) and the current delivered to the batteries is 80A (the maximum of a single unit as well)

One would expect the max charge current to be 160A.

Has anyone encountered this before and have some suggestions please?

charger bug report Skylla

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raymond commented · May 13 at 05:56 AM

Hi All,

More information that might help to point me to a solution:

Dip Switch Settings 1 to 6:

1 - off

2 - off

3 - off

4 - off

5 - off

6 - on

Rotary Switch:

I tried both positions 0 and 8.

I am sure this is a software bug, as both units go to full charge capacity (80A) when the other unit is switched off. When both are switched on, they equal out to 40A charge each. This is shown on the front panel LEDs.

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Modifications Space

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Answer 1 · 2024-05-14T06:48:23Z

raymond answered · May 14 at 06:48 AM

This is most definitely a bug:

In the manual, on page 8, paragraph 2.3.6 Synchronised parallel operation it states the following:

“The shore current limit of the parallel charger group can be set with the Skylla-i control panel. The current limit as shown on the panel is the shore current of the group.”

The problem is that it cannot be set higher than the current limit of a single unit, in my case 16A. For the group, it should be 32A. On the VictronConnect image below, you can see the ‘+’ is grayed out. Setting it from the Gerbo GX or Skylla-i control panel, it just jumps back to 16A when entering a larger value.

Does anyone know the channels to follow to get this bug reported to Victron? Any help would be greatly appreciated.

victron.png (42.8 KiB)

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raymond commented · May 17 at 10:38 AM

I have now reported this issue to our distributor, we now wait and see....

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Answer 2 · 2024-06-10T12:36:19Z

raymond answered · Jun 10 at 12:36 PM

I’ve been patiently waiting for nearly a month now, yet I haven’t received any response from our supplier, Victron Support, or even a member of the community. It seems like my issue has been met with silence, without even a simple acknowledgement.

Could anyone kindly provide some guidance on how to effectively catch the attention of Victron? I’m at my wits’ end and could really use some assistance. Thank you.

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