diff --git a/goodwe_controller/DOCS.md b/goodwe_controller/DOCS.md
index db3102d..89b1ee7 100644
--- a/goodwe_controller/DOCS.md
+++ b/goodwe_controller/DOCS.md
@@ -2320,11 +2320,14 @@ Do this on the Configuration tab, in one save, and restart once:
 3. **Clear** **Current price entity** (`price_now_entity`) and **Average price
    entity** (`price_avg_entity`). The add-on refuses to start with a price
    source and these two together.
-4. Keep **Supplier markup** and **Distribution, levies and VAT** as they are
-   for a wholesale price. If the Home Assistant sensors already included them,
-   the figures were never in these two options, so nothing else changes.
+4. Check **Supplier markup** and **Distribution, levies and VAT**. With the
+   Home Assistant pair they decided nothing about the maintenance charge. With
+   the provider they are added to the wholesale price, so they set the prices
+   shown on the page and, if battery modes or trading are on, the prices those
+   decide on. The maintenance charge gate does not depend on them.
 5. Keep **Fixed or day/night tariff** (`static_profile`) if you have one. It
-   stays the fallback for trading when no source answers.
+   is still the tariff used, marked as estimated and without trading, while no
+   source has a price.
 6. Remove the `price_service` REST and template sensors from Home Assistant
    when you are satisfied. They are no longer read.
 
diff --git a/goodwe_controller/test_price_service.py b/goodwe_controller/test_price_service.py
index 87cd687..3fd1bc3 100644
--- a/goodwe_controller/test_price_service.py
+++ b/goodwe_controller/test_price_service.py
@@ -21,7 +21,7 @@ THE SERVER IS A MOCK. This session holds no token, so it cannot ask the real
 one for a price. `Server` below answers the layout the design's API section
 gives (`unix_seconds`, `price`, `unit`, `zone`, `covers`, `source`,
 `fetched_at`), over a transport with the same contract as `price.https_get`.
-Section 12 drives the REAL `https_get` against a local aiohttp server, for the
+Section 11 drives the REAL `https_get` against a local aiohttp server, for the
 parts a mock transport cannot show: the header on the wire, the status words,
 the timeout, a refused connection.
 
@@ -637,6 +637,9 @@ class FakeHass:
     async def number(self, entity, invert=False):
         return self.values.get(entity)
 
+    async def set_number(self, entity, value):
+        return True
+
     async def call(self, domain, service, data):
         self.calls.append((domain, service, data))
         return True
@@ -730,11 +733,13 @@ class Wired:
         await asyncio.wait_for(task, timeout=5)
 
     async def tick(self, now=None):
-        """One 30 s tick: read inputs, then the price-gap check."""
+        """One control tick as `run_control` makes it: read inputs, then the
+        cycle, which is where the price-gap check is called from."""
         if now is not None:
             self.clock.now = now
+        self.ctl.auto = True
         await self.ctl.read_inputs()
-        await self.ctl.check_price_gap()
+        await self.ctl.cycle()
 
     def notes(self):
         return [(s, d) for dom, s, d in self.ctl.hass.calls