diff --git a/goodwe_controller/DECISIONS/OPT-11-battery-modes.md b/goodwe_controller/DECISIONS/OPT-11-battery-modes.md
index b453090..ebaabc7 100644
--- a/goodwe_controller/DECISIONS/OPT-11-battery-modes.md
+++ b/goodwe_controller/DECISIONS/OPT-11-battery-modes.md
@@ -127,8 +127,11 @@ P1 is its section 6 P1, and the pull request lists what was measured.
     before its end (two inverters, lagged readings): the hold adds at most
     +33 W to that quarter against the loop without it, and the most any
     quarter banks is 3431 W with the charge sized to the aim (3450 W; the cap
-    is 3500 W). The import during the hold is the rise, below the charge's
+    is 3500 W), 3456 W with a slow 8 s battery (the lag's own, the same on
+    e3e4ba6). The import during the hold is the rise, below the charge's
     own, and a rise past that is the peak floor's, which ends the hold.
+    A maintenance drain, hold or charge that starts during the hold ends it
+    on that tick (replayed at edge + 3 s).
 
 ## P4: the solar forecast and the day plan (2026-09-29)
 - Input: a Home Assistant forecast sensor (`pv_forecast_entity`, kWh left
diff --git a/goodwe_controller/test_price_run_fixes.py b/goodwe_controller/test_price_run_fixes.py
index 6a688e6..ecd6da1 100644
--- a/goodwe_controller/test_price_run_fixes.py
+++ b/goodwe_controller/test_price_run_fixes.py
@@ -187,6 +187,22 @@ check("...and a sample older than the hold is not credited: past the hold "
       and peakguard.blindness(_gp, 30.0, False) is not None)
 check("without `roll` nothing changes (the modes-off path)",
       PeakTracker.project(_avg, _now, roll=False) == _old)
+# Review of #157 (X1): a held export is credited as 0 W, as `add()` banks it,
+# never as a negative that would pull the rolled quarter under the meter.
+_exp = QuarterAverager(phases=1, max_hold_s=30.0)
+for _s in range(-900, 1, 1):
+    _exp.add(make_sample("ha_signed", 0.0, 1500.0, phases=1,
+                         ingest_ts=_edge + timedelta(seconds=_s - 0.35),
+                         ingest_mono=0.0))
+_ep = PeakTracker.project(_exp, _now, roll=True)
+_exp.add(make_sample("ha_signed", 0.0, 1500.0, phases=1,
+                     ingest_ts=_edge + timedelta(seconds=0.6),
+                     ingest_mono=0.0))
+_er = PeakTracker.project(_exp, _now)
+check("...and a held export rolls in as 0 W, equal to what the averager "
+      "banks for those seconds",
+      _ep.block_start == _er.block_start and _ep.projected_w == 0.0
+      and _ep.elapsed_w == 0.0 and _er.projected_w == 0.0)
 
 # 1b. The lagged replay: 02:00-03:30 local, a Cheap hours battery charging
 # under an 800 W house through five quarter edges.
@@ -444,6 +460,9 @@ check("the hold: the loop reads the target while the meter still shows the "
       and _held(3300.0, -2500.0, _hs + 1) == (3300.0, False)
       and _held(3300.0, -2000.0, _hs + 1) == (-10.0, True)
       and _held(3300.0, -2000.0, 2 * _hs + 1) == (3300.0, False))
+# Review of #157 (X4): a reading that has passed E is not "still moving".
+check("...and a battery reading already past E does not extend the hold",
+      _held(3300.0, 900.0, _hs + 1, last_b=700.0) == (3300.0, False))
 _f = SimpleNamespace(site_batt_w=500.0, grid=90.0, _edge=None,
                      tuning=ctl.Tuning(target_grid_w=-10.0), site_max_w=5000.0,
                      loop_bound=lambda claims: None, target=None, i_w=None)