diff --git a/debian/changelog b/debian/changelog
index a6bfaab..b606fab 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,38 @@
+etm-powersync-plugins-modbus (1.15.2+etm12) trixie; urgency=medium
+
+  * v2c: the Trydan now declares phaseCount, and it is ENTERED at pairing.
+
+    There is no phase register anywhere in the V2C Modbus map (0x0BC2-0x0BD5,
+    0x177A-0x1783): the charger cannot tell whether it is wired single or three
+    phase. The thing class did not declare phaseCount either, and the energy
+    engine's fallback for a missing state is SILENT -- EvCharger::phaseCount()
+    returns 1. On a three-phase Trydan that publishes a 1380 W floor instead of
+    4140 (6 A x 230 V x 1 instead of x 3) and converts an allocated envelope
+    into a current three times too high. The charger starts, at the wrong
+    current, with nothing in any log to say so.
+
+    That is the same defect family the energy plugin closed in 3g-2 -- a floor
+    that is announced but is not the one governing the start -- reopened on the
+    plugin side. Found the evening before the charger was due on the wall, by
+    reading the class declaration rather than by running it.
+
+    The value therefore comes from a SETTING (1 or 3, default 1), mirrored into
+    the state the engine reads, and re-applied on settingChanged so a rewired
+    charger can be corrected without recreating the thing. Default 1 matches the
+    engine's own fallback, so an installation that never sets it behaves exactly
+    as it did before this change.
+
+    The state carries minValue 1 / maxValue 3: the nymea evcharger interface
+    defines phaseCount with those bounds, and the plugin validator rejects the
+    class without them. Conforming means the engine reads it through the
+    interface, not through a plugin-specific convention.
+
+  * v2c: still no sessionEnergy, deliberately. ChargeEnergy (0x0BC4) stays a
+    diagnostic state -- see the plugin brief and evcc-io/evcc#28047. To be
+    re-examined with the charger and a reference meter in hand.
+
+ -- Patrick Schurig <etm.schurig@gmail.com>  Thu, 27 Aug 2026 15:20:00 +0200
+
 etm-powersync-plugins-modbus (1.15.2+etm11) trixie; urgency=medium
 
   * sunspec: stop warning about a missing battery channel on a machine that has
diff --git a/v2c/integrationpluginv2c.cpp b/v2c/integrationpluginv2c.cpp
index b10180a..735efdd 100644
--- a/v2c/integrationpluginv2c.cpp
+++ b/v2c/integrationpluginv2c.cpp
@@ -67,6 +67,30 @@ void IntegrationPluginV2c::setupThing(ThingSetupInfo *info)
 
     connect(info, &ThingSetupInfo::aborted, master, &TrydanModbusTcpMaster::deleteLater);
 
+    // --- Nombre de phases : SAISI, parce que la borne ne sait pas le dire -------------------
+    //
+    // Il n'existe aucun registre de phases dans la carte Modbus V2C (0x0BC2-0x0BD5,
+    // 0x177A-0x1783) : le câblage mono/tri n'est pas lisible sur la borne. Or le moteur
+    // energy-etm en a besoin, et son repli est SILENCIEUX — EvCharger::phaseCount() retourne 1
+    // quand l'état est absent. Sur une Trydan triphasée, cela publierait un plancher de
+    // 6 A x 230 V x 1 = 1 380 W au lieu de 4 140, et convertirait les watts alloués en un
+    // courant trois fois trop élevé. La borne démarrerait, au mauvais courant, sans erreur.
+    //
+    // Le nombre de phases vient donc d'un RÉGLAGE, modifiable si la borne est recâblée, et il
+    // est recopié dans l'état que le moteur lit. Défaut 1 : le même que le repli du moteur,
+    // pour qu'une installation non renseignée se comporte comme avant ce correctif.
+    auto appliquerNombreDePhases = [](Thing *t) {
+        const uint phases = t->setting(trydanSettingsPhaseCountParamTypeId).toUInt();
+        t->setStateValue(trydanPhaseCountStateTypeId, (phases == 3 ? 3u : 1u));
+    };
+    appliquerNombreDePhases(thing);
+    connect(thing, &Thing::settingChanged, thing, [thing, appliquerNombreDePhases](
+                const ParamTypeId &paramTypeId, const QVariant &/*value*/) {
+        if (paramTypeId == trydanSettingsPhaseCountParamTypeId) {
+            appliquerNombreDePhases(thing);
+        }
+    });
+
     // Reachability is driven by Modbus poll results (not TCP state directly).
     // initialize() is now called from TrydanModbusTcpMaster::onConnectionStateChanged(true)
     // so we no longer need to call it here — this handler only updates the UI.
diff --git a/v2c/integrationpluginv2c.json b/v2c/integrationpluginv2c.json
index b9cf8c3..b8bf700 100644
--- a/v2c/integrationpluginv2c.json
+++ b/v2c/integrationpluginv2c.json
@@ -63,6 +63,17 @@
                             "displayName": "Suspend internal V2C optimizer when HEMS takes control",
                             "type": "bool",
                             "defaultValue": true
+                        },
+                        {
+                            "id": "ff07260e-1583-51a3-a536-483ce513a218",
+                            "name": "phaseCount",
+                            "displayName": "Number of connected phases (1 or 3)",
+                            "type": "uint",
+                            "defaultValue": 1,
+                            "allowedValues": [
+                                1,
+                                3
+                            ]
                         }
                     ],
                     "stateTypes": [
@@ -112,6 +123,16 @@
                             "defaultValue": 16,
                             "writable": true
                         },
+                        {
+                            "id": "1435a5cd-7054-5ef3-8511-51b09df6a148",
+                            "name": "phaseCount",
+                            "displayName": "Connected phases",
+                            "type": "uint",
+                            "defaultValue": 1,
+                            "minValue": 1,
+                            "maxValue": 3,
+                            "cached": false
+                        },
                         {
                             "id": "2570c0d7-f9a5-4e24-9242-6d79253004ec",
                             "name": "currentPower",