SmartSolar MPPT VE.Can 250/100 shows voltage but zero PV current and 0W power

Been scratching my head with a similar gremlin on my setup and wondered if anyone else has hit this.

Running a Victron SmartSolar MPPT 250/100 (the VE.Can variant) paired with a Cerbo GX on Venus OS. PV voltage is reading correctly in the VRM portal — sitting around 180V which looks right for my string — but current and power are both showing absolute zero. Battery is a 48V system (Fogstar cells, DIY build).

It's not a wiring fault as far as I can tell. The controller sees the panels, it just refuses to acknowledge any current flowing. Checked the VE.Can termination resistors, both ends are set correctly. Firmware on the MPPT is current.

A few things I'm wondering about:

• Could this be a Venus OS version issue? I updated recently and the problem appeared around the same time
• Is there a known quirk with VE.Can MPPTs where the charge algorithm gets stuck and needs a full power cycle rather than just a soft reset?
• Anyone seen the absorption/bulk threshold misconfigured after an update causing it to effectively throttle to zero?

The panels themselves are fine — checked with a clamp meter directly at the array and current is definitely there physically.

Before I log a ticket with Victron support I'd rather exhaust the community knowledge here. Has anyone on a similar VE.Can setup seen this? Particularly curious whether it's a comms issue between the MPPT and Cerbo rather than the MPPT itself actually not charging.

@NotAnElectrician classic one this! That "voltage but zero current" combo almost always points to one of a few culprits:

1. PV wiring polarity reversal on one string — the MPPT sees open-circuit voltage but can't sweep the IV curve properly
2. Failed bypass diodes in a panel, particularly if you've had any shading or a hot-spot event
3. VE.Can termination resistors — the 250/100 VE.Can variant is notoriously grumpy if both ends of the CAN bus aren't properly terminated (120Ω each end). Cerbo GX has an internal terminator you enable in settings

On my own Victron setup I chased a near-identical fault for two days before realising one string had a micro-crack panel dragging everything down.

Worth checking the History tab in VEConfigure or VictronConnect — if Vmax looks sensible but Imax reads 0.0A ever, your string wiring is suspect before the controller even.