Is Skylla IP65 charger compatible with DVCC SVS?

Just upgraded my motorhome setup with a full Victron ecosystem — Cerbo GX, MultiPlus II, SmartShunt, SmartSolar MPPT — and the Skylla IP65 is sat there looking pretty while I'm not entirely convinced it's playing nicely with DVCC Shared Voltage Sense.

Running a 200Ah 24V LiFePO4 bank (Fogstar cells, since you ask), and the BMS is talking to the Cerbo just fine. DVCC is enabled, SVS is ticked, everything looks cooperative on the VRM portal — but I've got a nagging suspicion the Skylla is doing its own thing on voltage sensing rather than deferring to the SmartShunt's readings.

From what I can gather, the Skylla IP65 connects via VE.Can and should participate in SVS, but the documentation is characteristically Victron — technically exhaustive and somehow still ambiguous when you actually need a straight answer. 🙃

Has anyone here confirmed whether the Skylla properly hands off voltage sensing to the SmartShunt when SVS is active, or does it stubbornly insist on its own internal measurement? Particularly curious if anyone's verified this with a proper analyser rather than just trusting the portal readouts.

Also worth asking — is anyone running this combination in a static off-grid setup (rather than marine) and noticed any DVCC quirks? My motorhome lives on my smallholding most of the year now so it's essentially a fixed installation at this point, just with wheels I've forgotten exist.

Reckon it's probably fine but the nurse in me wants the actual evidence, not just reassurance. 😅

@RetiredNurse49 the Skylla IP65 plays nicely with DVCC SVS only if it's on VE.Can — the VE.Direct version just sits there like a confused uncle at Christmas, taking no instruction from the Cerbo whatsoever.

@RockyMender is spot on — to add the pedantic footnote: even with VE.Can, SVS (Shared Voltage Sense) on the Skylla IP65 requires firmware v1.09 or later, so check that first or you'll be chasing your tail wondering why the voltage offsets look drunk.

Also worth knowing: with DVCC fully enabled, the Cerbo becomes the "boss" and the Skylla hands over charge voltage control — your SmartShunt feeds the real battery voltage back, which is exactly what you want rather than the charger guessing from its own terminals.

Had a similar head-scratcher commissioning my own lithium bank — firmware was the culprit every time.

@OldSailor already covered the pedantic bit so I'll add the actually useful bit — make sure your Cerbo GX firmware is current because pre-v2.80 had a delightful bug where the Skylla would acknowledge SVS then cheerfully ignore it and charge at whatever voltage it fancied, like a toddler agreeing to bedtime then immediately asking for a biscuit. Had exactly this on my static caravan setup before I noticed the batteries were getting slightly more enthusiasm than planned. Check VRM logs for charge voltage discrepancies — if your SmartShunt is reporting pack voltage noticeably below what the Skylla thinks it's pushing, that's your smoking gun. Also worth confirming the Skylla IP65 firmware itself is updated; older versions had their own opinions about DVCC compliance.

@Rob1963 good shout on firmware — worth adding that if you're running SCS (Shared Current Sense) alongside SVS, double-check the Skylla shows up properly under Devices in the Cerbo dashboard before assuming it's all talking. Mine didn't register cleanly until I physically swapped the VE.Can terminator to the last device in the chain. Classic rookie mistake but easily missed.

Also @RetiredNurse49 with a MultiPlus II in the mix, DVCC basically becomes the traffic controller for the whole lot — once it's sorted you'll wonder how you managed without it. Garden office setup here runs the same stack and it's rock solid.

@WattHamish good point on SCS — one thing nobody's mentioned yet though: check your cable gauge on the VE.Can bus. Sounds daft but I had a nightmare on my motorhome build where SVS was technically working but giving slightly off readings. Turned out to be a dodgy termination on one of the RJ45 connectors. Cerbo was seeing weird voltage drops and compensation was all over the place.

Grab a proper VE.Can tester or just methodically re-terminate both ends. 120 ohm terminators seated correctly at each end of the bus too — easy to miss one.

@RetiredNurse49 once you've got it all talking properly the SVS on a full Victron ecosystem is genuinely brilliant, batteries thank you for it. My Fogstar cells have been much happier since sorting mine out.