VenusOS / Exclude OrionXS/VEdirect from DVCC

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smoothfroggy asked Jun 19, '24

VenusOS / Exclude OrionXS/VEdirect from DVCC

I would be very grateful if I could be directed on ways to exclude from DVCC an OrionXS connected to a VenusOS via VEdirect.

The rationale behind this demand follows:

System description
- Main battery LiFePO4 + ABMS ; charged by dedicated alternator and PV (MPTT 100/20)
- Small battery ; charged by OrionXS
- VenusOS :
  - RaspberryPI
  - In charge of main battery through CAN communication with ABMS ; DVCC active
  - OrionXS hooked via VEdirect for monitoring only. The OrionXS should not be driven by the DVCC related to main battery but should keep using its internal charge algorithm.

I would be grateful if I could be adviced on the most appropriate way to exclude the OrionXS from the charge control associated to DVCC while keeping the possibility to monitor it via VEdirect. Is there a mechanism in dbus-systemcalc delegates or within the settings of VenusOS that can be leveraged to exclude a device ?

Best regards,

SmoothFroggy

Venus OS DVCC

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Answer 1 · 2024-06-19T08:59:48Z

Alexandra answered · Jun 19 at 08:59 AM

@smoothfroggy

Since the only other device controlled by the DVCC is the mppt there i would suggest removing the bms control from DVCC (an easier option). Then all are monitored none are controlled except by their internal algos.

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Answer 2 · 2024-06-20T05:26:35Z

mvader (Victron Energy) answered · Jun 20 at 05:26 AM

Hi,

To add: we’ll come with a good solution for this in Venus OS.

But not sure when yet, until then remove the BMS from DVCC, disable DVCC if possible, or disconnect the Orion XS from Venus OS.

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Answer 3 · 2024-06-20T06:57:05Z

smoothfroggy answered · Jun 20 at 06:57 AM

Alexandra,

Thanks for the reply. I'll investigate that path but the BMS (REC-ABMS) is the one providing/sharing current and cell bank voltage to VenusOS via CAN and hence to MPPT via VEdirect. Disabling it would somewhat deprive MPPT from this data wouldn't it ?

Regards,

SmoothFroggy

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Answer 4 · 2024-06-20T06:59:22Z

smoothfroggy answered · Jun 20 at 06:59 AM

Matthijs,

Thanks for the heads up. Please, for the sake of understanding, could you elaborate on what is on tracks within VenusOS to address such situation.

Best regards,

SmoothFroggy

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Answer 5 · 2024-07-08T07:02:10Z

rkapsi answered · Jul 08 at 07:02 AM

+1

I have a somewhat similar situation and I think the problem can be refined a little bit further. It's not a question of DVCC but a question of what the Orion is charging / where is it drawing energy from?

I have a LiFePO4 House Battery (210Ah) that is charged directly from the Alternator (WS500) and a small (only 10Ah) Engine Battery (also LiFePO4) which I'm charging from the House Battery using the Orion XS. When I connect the Orion to my Cerbo GX with VE.Direct it's not just falsely applying the DVCC but from the Cerbo's perspective it's charging the House Battery.

IMHO the Orion needs to differentiate between being a Charger or being a Load in respect to the Battery Bank that is being monitored by the Venus device. In charger mode it'd be probably a good feature to have to be able to suppress DVCC and in load mode you don't want DVCC at all.

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