From ef12393ffe1d09c32b86bc9d7c2d1a71d45e5860 Mon Sep 17 00:00:00 2001
From: CiNcH83 <daniel.bechter@gmail.com>
Date: Tue, 19 May 2026 18:30:36 +0200
Subject: [PATCH] Huawei SUN2000: add curtail (#28549)

---
 .../meter/huawei-sun2000-hybrid.yaml          | 49 ++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/templates/definition/meter/huawei-sun2000-hybrid.yaml b/templates/definition/meter/huawei-sun2000-hybrid.yaml
index 36cc5fc02..a6d0857a6 100644
--- a/templates/definition/meter/huawei-sun2000-hybrid.yaml
+++ b/templates/definition/meter/huawei-sun2000-hybrid.yaml
@@ -5,7 +5,7 @@ products:
     description:
       de: SUN2000 Hybrid-Wechselrichter
       en: SUN2000 Hybrid Inverter
-capabilities: ["battery-control"]
+capabilities: ["battery-control", "curtail"]
 requirements:
   description:
     de: |
@@ -39,6 +39,12 @@ params:
     default: 15s
   - name: maxacpower
     service: modbus/read?address=30075&type=holding&encoding=uint32&{modbus}
+  - name: curtailpercent
+    description:
+      de: Wirkleistungsbegrenzung in Prozent
+      en: Active power limit in percent
+    advanced: true
+    usages: ["pv"]
   - name: storageunit
   - name: forceaccharging
     default: false
@@ -132,6 +138,47 @@ render: |
       decode: uint32nan
     scale: 0.01
   maxacpower: {{ .maxacpower }}
+  curtail:
+    source: ifelse
+    if:
+      source: sequence
+      set:
+      - source: const
+        value: {{ .curtailpercent }}
+        set:
+          source: modbus
+          {{- include "modbus" . | indent 8 }}
+          register:
+            address: 47418 # Maximum Feed Grid Power (0-100 %)
+            type: writesingle
+            encoding: uint16
+          scale: 10
+      - source: const
+        value: 7 # Power-limited grid connection (%)
+        set:
+          source: modbus
+          {{- include "modbus" . | indent 8 }}
+          register:
+            address: 47415 # Active power control mode
+            type: writesingle
+            encoding: uint16
+    else:
+      source: const
+      value: 0 # Unlimited 
+      set:
+        source: modbus
+        {{- include "modbus" . | indent 6 }}
+        register:
+          address: 47415 # Active power control mode
+          type: writesingle
+          encoding: uint16
+  curtailed:
+    source: modbus
+    {{- include "modbus" . | indent 2 }}
+    register:
+      address: 47415 # Active power control mode (0=no curtailment)
+      type: holding
+      decode: uint16
   {{- end }}
   {{- if eq .usage "battery" }}
   power: