From 003573f076fbc764d8530f0ebb40b14ff95c37a9 Mon Sep 17 00:00:00 2001
From: Florian Zahn <mail@florianzahn.de>
Date: Sun, 10 Aug 2025 14:29:54 +0200
Subject: [PATCH] Lambda: keep "excess-parameter" for backward compatibility
 (#22883)

---
 templates/definition/charger/lambda-zewotherm.yaml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/templates/definition/charger/lambda-zewotherm.yaml b/templates/definition/charger/lambda-zewotherm.yaml
index a3d7b59f0..68d1b3a49 100644
--- a/templates/definition/charger/lambda-zewotherm.yaml
+++ b/templates/definition/charger/lambda-zewotherm.yaml
@@ -32,7 +32,13 @@ params:
   - name: phases
     deprecated: true
   - name: excess
-    deprecated: true
+    advanced: true
+    type: choice
+    choice: ["plus", "minus"]
+    default: "plus"
+    description:
+      de: veraltet, bei neg. E-Überschuss auf minus
+      en: deprecated, set for neg. e-excess to minus
   - name: watchdog
     type: duration
     default: 60s
@@ -51,6 +57,7 @@ render: |
         address: 102 # PV Überschussleistung
         type: writemultiple # λ erwartet single value als FC16
         decode: int16
+      scale: {{ if eq .excess "plus" }}1{{ else }}-1{{ end }}
   power:
     source: modbus
     uri: {{ .host }}:{{ .port }}