SAFETY-128 review: DECISIONS states the slow-battery limit as measured

Round 2 review: a 10 s dead time reads late at 1-2 s meters, and a 15-20 s
lag gives late fits; the note said 3-20 s and 6-10 s gave none.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC

goodwe_controller/DECISIONS/SAFETY-128-late-readings.md

@@ -23,8 +23,9 @@ inverter limit in its last seconds (OPT-34 rig F-2).
      Late from 9.5 s, after 2 late fits in a row. A late fit must explain 75 %
      and beat every fit up to 6.5 s by 2x; the shortest delay that fits about
      as well (within 2x, or within 2 500 W^2) is taken instead, since a swing's
-     period fits again. A slow battery (3-20 s lag) answering at once gives no
-     late fit (checked in the test). No late battery fit counts for 60 s
+     period fits again. A slow battery (3-10 s lag) answering at once gives no
+     late fit; at a 15-20 s lag some fits read late (see "What it costs").
+     No late battery fit counts for 60 s
      after a battery gave nothing under its ask: an emptied battery lined its
      old movement up as 85 s late.
    - **Meter** (`MeterFit`, round 1's fit): `meter(t) + request(t - d)` is the
@@ -56,7 +57,7 @@ inverter limit in its last seconds (OPT-34 rig F-2).
    WARNING (`READINGS_LATE`) per episode and one line when it ends.
 
 **With readings on time** no verdict was reached in any reviewer scenario
-(owner-shaped house, ovens 20/40 to 60/60 s, clouds, a 300 W/s battery, 6-10 s
+(owner-shaped house, ovens 20/40 to 60/60 s, clouds, a 300 W/s battery, 6-8 s
 dead times, HA jitter 0-4 s, an EV following the meter, capped batteries, HA
 restarts, meter pauses; 1, 2 and 5 s meters) nor in 2 days of the recorded
 house at 1, 2 and 5 s ticks, so the commands are the same as without the gate.
@@ -66,8 +67,10 @@ The fits run all the time; the pull request has the counts.
 - Found 36-68 s after a lag starts at 1-2 s meters, about 3 minutes at a 5 s
   meter (battery fit only; the meter fit needs a faster meter). Until then control is as before. At 5 s and 30 s
   late the export is cut to about a third, not removed.
-- A battery whose own answer takes about 10 s is close to the threshold: an
-  8 s dead time reads 7, 10 s reads 9, HA 10 s late reads 10.
+- A battery that answers slowly is read as late readings and held: a dead
+  time of 10 s or more (8 s reads 7-8; 10 s reads 10 at 1-2 s meters, 9 at
+  5 s), or a 15-20 s lag (review round 2). The GoodWe measured settles in 6 s
+  (`freshness.PLANT_SETTLE_S`); the row then blames Home Assistant wrongly.
 - The row can stay up to 180 s after the readings are on time on a steady
   site. While only the meter has shown the delay it gives no figure.
 - A battery that cannot follow while the readings are late (at a limit, not