diff --git a/goodwe_controller/test_opt27.py b/goodwe_controller/test_opt27.py
index 6989dda..62ac848 100644
--- a/goodwe_controller/test_opt27.py
+++ b/goodwe_controller/test_opt27.py
@@ -508,6 +508,33 @@ check("03:30 (after midnight + 3 h): a figure from before the night is not "
       present(lf) and lf["fc_none"] and lf["runs_on"] is False
       and lf["reason"] == "not_worth" and not any(r["charging"] for r in rf))
 
+# g. OPT-28's shortfall sizing on a kept figure: Leftover solar (A) is sized
+# from the kept forecast exactly as from a fresh one, not "no forecast"
+def fresh_all(now, ent):
+    return st(0.4 if ent == T_ENT else 12.0, now)
+
+
+cg, rg, pg = drive27(opts(), fresh_all, pre=EVENING + [at(DAY3, 21, 55)],
+                     start=NIGHT_START)
+kp, fp_ = ca.day_plan, cg.day_plan
+print(f"    g. kept   : short={kp and kp.short_kwh} uncovered="
+      f"{kp and kp.uncovered_kwh} targets={kp and kp.targets} "
+      f"need={kp and kp.need_kwh} sun={kp and kp.sun_kwh}")
+print(f"       fresh  : short={fp_ and fp_.short_kwh} uncovered="
+      f"{fp_ and fp_.uncovered_kwh} targets={fp_ and fp_.targets} "
+      f"need={fp_ and fp_.need_kwh} sun={fp_ and fp_.sun_kwh}")
+check("a kept figure sizes the night by OPT-28's shortfall, with a level for "
+      "Leftover solar (A): not 'no forecast', which has no plan at all",
+      kp is not None and A in kp.targets and kp.short_kwh > 0.0
+      and cb.day_plan is None and not cg.solar_fc.kept)
+check("... and the level, the grid need, the shortfall and the sun counted "
+      "are those a fresh figure gives (counted once, from the right time)",
+      fp_ is not None and kp.targets == fp_.targets
+      and kp.need_kwh == fp_.need_kwh and kp.share_kwh == fp_.share_kwh
+      and abs(kp.short_kwh - fp_.short_kwh) < 1e-9
+      and abs(kp.uncovered_kwh - fp_.uncovered_kwh) < 1e-9
+      and abs(kp.sun_kwh - fp_.sun_kwh) < 1e-9)
+
 # --------------------------------------------------------------------------- #
 print("\n3. The screens")
 blk = ca.block