diff --git a/goodwe_controller/CHANGELOG.md b/goodwe_controller/CHANGELOG.md
index 5457dfd..a0f38b0 100644
--- a/goodwe_controller/CHANGELOG.md
+++ b/goodwe_controller/CHANGELOG.md
@@ -84,6 +84,18 @@ per-cycle gain the tuning was measured against are unchanged - asserted in
 `cycle_floor_s` reproduces the old behaviour exactly) and comparing the
 commanded values.
 
+Observed over six real minutes on the same rig, one binary, meter held at a
+literally constant 350.0 W: **before, 1 cycle** (at startup) and then nothing,
+the command stuck at 220 W against a 350 W import for the rest of the window.
+**After, 24 cycles**, worst gap 15.14 s, and the ordinary PI ramp doing its job -
+220, 430, 650, 860, 1080, 1300, 1510, 1730, 1940, 2000 W, one step per cycle,
+rail at t=136 s and flat after. Three minutes with the meter parked at the
+target instead: **1 cycle before, 12 after, and 19 writes either way - the same
+19**. Three minutes on a normally-changing meter: **36 cycles and 49 writes on
+both sides, the same values in the same order.** The heartbeat write count never
+moves; the only writes the fix adds are the ten the loop was supposed to be
+making all along.
+
 15 s is bracketed, not round. Below it: arrivals are ~5 s (NOTES.md measures
 4.97 s), detected up to 1 s late by the 1 s poll, and one dropped poll is
 retried on the next tick - about 11 s worst case on a meter that is merely