Slat angle - summer mode

[tomasstankovic]

Hi guys, Im relatively new in shades automation. Couple of weeks I trying to resolve summer sun and heat automatically.

I have Venetian blind setup, but im not really sure angle correction is working correctly as you can see on photo. photo is taken with full sun out. I expect there will be like, angle little bit different, as you can see on floor there is sun, which is producing heat.

Do you have some recommendation how to setup this better please? I tried everything.
I have climate mode on, with outside and in room temperature.

Thank you!

This is my config summary:

Your Cover
Venetian Blind (Dual-Axis) controlling cover.shelly2pmg4_ccba97ddfde8
2.6m tall window, blocking sun 0.5m from the glass
slat depth 9.0cm, spacing 6.5cm, mode: mode1
skip tilt when position > 95%
mode: position and tilt
min tilt 0%
max tilt 100%
post-settle hold 5.0s
back-rotate publish lag 90.0s

How It Decides (first matching rule wins)
🌧️ Weather safety: if wind > 50.0 → covers retract to 0.0% (waits 300.0s after clearing) ⚠️ halts all automation while triggered  [90]
✋ Manual override: pauses automatic control when you move the cover (pauses for 2 h)  [80]
🌡️ Climate mode: adjusts strategy for heating/cooling (comfort range 21.0–25.0°C, using sensor.0xa49e69fffe71d0f2_temperature, outside: sensor.stiebel_eltron_isg_outdoor_temperature > 18.0°C, weather: weather.domov_2)  [50]
☀️ Tracks the sun (azimuth 90.0°, ±90.0°/90.0° field of view) and calculates position to block direct sunlight (today: sun in window 04:55 → 13:00)  [40]
🌙 Default (no rule matches) → 100.0%  [0]

Position Limits
Range: 0.0%–100.0% · Default: 100.0% · Min change: 2.0% · Min interval: 2.0 min · Position tolerance: 3.0% · Open/close threshold: 50.0%
🎛️ My-preset entities: disabled

Proxy cover: disabled

Decision Priority (highest wins, ✅ active ❌ not configured)
❌Force → ✅Weather → ✅Manual → ❌Motion → ❌Cloud → ✅Climate → ✅Solar → ✅Default

[jrhubott]

From your config summary the key things to check: what are your max_tilt and min_tilt values, and is sun tracking currently showing as the pipeline winner or is something else active? The sun on the floor suggests the slats aren't closing far enough — either max_tilt is set too high (not closing the slats), the sun is outside your FOV so tracking has already stopped and the slats are at default tilt, or climate mode is running and the tilt is being overridden. Pull a diagnostics download and look at the pipeline decision trace — it'll show exactly which handler set the tilt and what value it sent.

[tomasstankovic]

Thanks for your reply @jrhubott . This is current state, so Sun in FOV is winner.

Max tilt - 100
Min tilt - 0

config_entry-adaptive_cover_pro-01KSWNX5TCCPM0724EYTQKDP7K.json

[nosek-tomas]

Hi, have you managed to figure out why the TILT doesn't work during solar tracking?

I haven't been able to get it to work either. My TILT is still fully open during solar tracking.

[jrhubott]

The tilt is tracking here — it's not stuck. For your slat geometry (depth 9.0 cm, spacing 6.5 cm) the slats only need to reach horizontal to overlap and block high summer sun, so the model correctly opens them toward horizontal (which reads as ~100% / "fully open"). Once the sun is high enough that tan(elevation) ≥ spacing/depth, flat slats already block the direct beam, so the calculation stops closing them further.

The leftover sun on your floor is the model aiming for the exact grazing angle with no slack, so near the edges of the field of view (or when the geometry is marginal) a sliver can leak through. Two things you can do today:

1. Lower max_tilt (try 50–70%). The solar path honors max_tilt, so this caps how far the slats open and forces them more closed — the simplest lever for "block more sun now."
2. Double-check slat_depth / slat_distance match your real blind. If depth is set too large relative to spacing, the model thinks flat slats block sooner than they actually do.

@nosek-tomas — same on your side: the tilt is being calculated, but for typical slat geometry the target lands at/near horizontal, which looks "fully open." Lowering max_tilt is the quickest way to force more closure.

I'm also tracking a longer-term improvement: a configurable tilt safety margin (the vertical-position axis already has one; the tilt axis doesn't), so the slats close a bit past the exact grazing angle and kill this residual leakage automatically.

[jrhubott]

See #783. It is available in the dev version now and will ship in the 2026.7 release.