diff --git a/goodwe_controller/tools/ux54_scenarios.py b/goodwe_controller/tools/ux54_scenarios.py
index d30e7e6..bed5a27 100644
--- a/goodwe_controller/tools/ux54_scenarios.py
+++ b/goodwe_controller/tools/ux54_scenarios.py
@@ -247,6 +247,12 @@ def make(name, now, *, soc=(55.0, 40.0), modes=("solar_first",
         tomorrow = False
     if name == "sunny":
         sun_today, sun_tomorrow = 40.0, 40.0
+    if name not in ("nofc", "off", "stale") and \
+            opts.get("battery_modes_enabled"):
+        # TARIFF-24: with a forecast the gap needed is the cycle cost, not
+        # 1.5 x it. These scenarios were written for the old gate (0.15 at
+        # the shipped 0.10), so they keep it: the cost is 0.15.
+        opts["cycle_cost_threshold_eur"] = 0.15
     c = Controller(opts, Hass(), Store(), Pub(), stop=asyncio.Event())
     c.auto = True
     for i, inv in enumerate(c.inverters):