Smart Grid Status always shows evu_locked on Luxtronik 2.0 (SG1.1)

[Schmider112]

Description

The Home Assistant HACS integration for Luxtronik always reports the entity
sensor._smart_grid_status as evu_locked, even though the Luxtronik controller itself shows correct Smart Grid state transitions.

The issue occurs on Luxtronik 2.0 (WZS81H) with Smart Grid 1.1 enabled.
Integration: luxtronik (HACS
Version: latest (2026.06.30 in HA Core environment)
Device: Alpha Innotec WZS81H
Controller: Luxtronik 2.0
Smart Grid: SG 1.1 enabled
Home Assistant OS (SSH Add-on used for verification)

Observed Behavior

Home Assistant entity:

sensor.luxtronik_220704_087_smart_grid_status

always shows:

evu_locked or reduced_operation

regardless of actual Smart Grid state.

Even after forcing updates or toggling inputs.

SG1 = 1 SG2 =1 Luxtronic Display 3
SG1 =1 SG 2=0 Luxtronic Dislpay 2

So the controller is clearly switching states correctly.

The HA integration does not reflect the real Smart Grid state.

Instead:

all states resolve to evu_locked
or fallback default state is always used

Smart Grid monitoring in Home Assistant is currently unreliable for Luxtronik 2.0 systems using SG 1.1.

Request

Please verify Smart Grid status mapping for Luxtronik 2.0 / SG 1.1 and adjust the enum decoding or register mapping accordingly.

[rhammen]

@siedi Can you also have a look at this one?
Similar issue as the other one?
But this one is a different SG mode (1.1 , not +/-) , not sure if the current code deals with that?

[remyderuysscher]

Can you clarify if SG status is only working with a relais which switches the contacts or should it also work with a software implementation?

[siedi]

@rhammen yes, related to #500 but with two twists.

Symptom is the same EVU2 problem. It's always evu_locked/reduced_operation, and both of those are EVU2=0 states, so the integration is reading EVU2 as 0 regardless of the actual contact, exactly like @Zaschii. But this is Luxtronik 2.0 (WZS81H), an older generation than the 2.1 firmware I analyzed, the register layout and EVU2 handling can be completely different there, so my calc-185/HZIO findings don't automatically carry over. @Schmider112's reported mapping (SG1=1,SG2=1 => 3, SG1=1,SG2=0 => 2) doesn't match any of the tables from the 2.1 manual, which makes me think Luxtronik 2.0 differs (or SG1/SG2 are labeled differently).

On SG 1.1: you're right, the current code does not handle it. _update_smart_grid_status has a single hard-coded table, which is the "+/-" mapping (locked / reduced / normal / increased). SG 1.0 and SG 1.1 use different EVU1/EVU2->state tables per the AIT manual, so on an SG 1.1 system the labels are wrong even if the inputs were read correctly. That's the mode-aware refactor I flagged earlier (make ID_Einst_SmartGrid a mode with one table per variant), it needs proper testing, so I'd keep it separate from the #500 fix.

@Schmider112 could you attach a diagnostics file for the integration, ideally two of them taken at two clearly different Smart Grid states (and tell us the state the controller display shows for each)? Then we can see the actual register values on Luxtronik 2.0 and whether EVU2 is exposed at all.

(@remyderuysscher regarding your question: no, the Smart Grid state can only be driven by physically switching the EVU1/EVU2 contacts, e.g. with a relay. There is no software way to set it: EVU1/EVU2 are read-only hardware inputs, and the Luxtronik protocol exposes no writable parameter to override them or force an SG state. So Home Assistant can read the SG state (when the hardware exposes it), but it cannot switch it. The only software-based power/PV control on these units is the separate Modbus "Smart Home Interface", but that controls power-limiting / setpoint offsets directly and does not set EVU1/EVU2, so it's a different mechanism, not SG switching.)

[Schmider112]

Hi,

Thanks for the explanation.

I will provide two diagnostics files from my Luxtronik 2.0 WZS81H.

Test case 1:

• SG1 = ON
• SG2 = ON
• Luxtronik display: Smart Grid state = 3

Test case 2:

• SG1 = ON
• SG2 = OFF
• Luxtronik display: Smart Grid state = 2

The physical inputs are switched by shellys, and the Luxtronik display changes immediately, so the hardware contacts seem to be detected correctly by the controller.

config_entry-luxtronik2-SG1 on SG2 off.json
config_entry-luxtronik2-SG1 on SG2 on.json

I will attach both diagnostics.