AC In - Leistungsmessung und Aneige am Touch 70

Been wrestling with something similar on my shepherd's hut setup and wondered if anyone else has hit this wall.

Running a Victron Multiplus-II with a Cerbo GX and Touch 70 display, and whilst I can see all the DC-side data beautifully through the SmartShunt, the AC input metering feels almost deliberately vague. When my grid-tie feed kicks in through the changeover relay, the Touch 70 just shows a generic "AC In" without any real power figures — watts, current, nothing useful.

The German-language thread I stumbled across had someone with a Phoenix inverter and an IP43 charger asking essentially the same thing: how do you actually get meaningful AC input measurements displayed?

From what I've pieced together, the Cerbo can pull AC metering data if you add something like a Victron Energy Meter (ET112 or ET340) on the AC input side. But that feels like an expensive addition when the Multiplus surely knows what's coming in?

A few things I'm still unsure about:

• Does the Multiplus-II report AC input power natively to the Cerbo, or does it need an external meter?
• Would a Carlo Gavazzi meter (the ones Victron resell) give better resolution than relying on the inverter's internal sensing?
• Anyone using VRM Portal to compensate for what the Touch 70 doesn't show locally?

Mainly asking because I want to properly track how much grid energy I'm pulling versus what the Fogstar battery bank is contributing — especially useful when I'm fast-charging an EV from the hut's supply.

Anyone sorted this cleanly?

@VivaroBuild looks like your post got cut off mid-sentence, but I'll take a stab at what you're likely hitting based on my own Multiplus-II / Cerbo GX setup in my motorhome.

The AC In measurement on the Touch 70 relies on the Multiplus-II's internal metering — it only displays properly when the unit is actually in passthrough or charging mode with shore power connected. If you're seeing zeros or blank readings on the AC In tile, check under Settings > System Setup > AC Input 1 in VRM/Cerbo and confirm the input type is set correctly (Generator vs Shore).

Also worth verifying your VE.Bus firmware is current — older firmware had known issues with AC In reporting on the Touch 70 specifically. Update via VictronConnect over Bluetooth or USB-MK3 interface.

What exactly were you seeing on the display?

@VivaroBuild your post did cut off but I'm guessing you're asking about the AC input readings not showing correctly on the Touch 70?

Had exactly this on my motorhome build with a Multiplus-II 12/3000. The display was showing wildly inconsistent AC-in wattage — turned out I hadn't properly configured the grid meter settings in VEConfigure. Worth checking:

• Is your AC input type set correctly (shore power vs generator)?
• Have you got an ET112 or ET340 grid meter installed, or relying purely on internal measurements?

Without an external meter, the Multiplus-II's internal AC-in sensing can be a bit rough. Also double-check your ESS assistant isn't interfering if you've got one loaded — that caught me out for a solid week before someone on here pointed it.

What firmware version are you running on the Cerbo?

Looks like we've all had a stab at guessing what @VivaroBuild was actually asking 😄

Had similar confusion with my Cerbo + Touch 70 combo when I first set it up — the AC input readings can be a bit misleading depending on how you've got your grid meter configured in VRM. Worth checking whether you've got an external energy meter wired in or if it's relying solely on the Multiplus's internal measurements.

Also — thread title's in German which is a bit of an odd one for a UK forum, @VivaroBuild — did you copy that from a Victron community post? Their DE forum has loads on this topic if so.

Post the full question when you get a chance, easier to help properly then.

Yeah @VivaroBuild post definitely got cut off but based on the thread title — "AC In measurement and display on Touch 70" — I reckon the issue is the AC input not showing on the Touch 70 dashboard at all, or showing zero/wrong values.

Few things I'd check:

• VE.Bus assistant — is AC input 1 actually configured as grid/shore in the Multiplus-II settings?
• In VictronConnect or VRM, check ESS or input current limit settings aren't masking the readings
• The Touch 70 sometimes needs a firmware sync between the Cerbo and Multiplus — had this exact weirdness on my garden office setup after an update

Also worth checking the grid meter setting in the Cerbo — if it thinks there's a separate meter installed but there isn't, it'll ignore the internal sensing completely.