diff --git a/plugins/solar/solarman_api_inverter b/plugins/solar/solarman_api_inverter
index a7863b85..25c5699e 100644
--- a/plugins/solar/solarman_api_inverter
+++ b/plugins/solar/solarman_api_inverter
@@ -20,7 +20,7 @@ plugin config:
 
   [solarman_api_inverter]
     env.SLRM_APPID 2XXXXXXXX2
-    env.SLRM_DEVICE_SN=2XXXXXXXXX6-1
+    env.SLRM_DEVICE_SN 2XXXXXXXXX6-1
     env.SLRM_MAIL "XXXX@YYY.de"
     env.SLRM_PASSWORD 'aXXXXXXXXf'
     env.SLRM_APPSECRET aXXXXXXXb
diff --git a/plugins/solar/solarman_api_panels b/plugins/solar/solarman_api_panels
index 0f7303cd..5009b966 100644
--- a/plugins/solar/solarman_api_panels
+++ b/plugins/solar/solarman_api_panels
@@ -20,7 +20,7 @@ plugin config:
 
   [solarman_api_panels_<name>]
     env.SLRM_APPID 2XXXXXXXX2
-    env.SLRM_DEVICE_SN=2XXXXXXXXX6-1
+    env.SLRM_DEVICE_SN 2XXXXXXXXX6-1
     env.SLRM_MAIL "XXXX@YYY.de"
     env.SLRM_PASSWORD 'aXXXXXXXXf'
     env.SLRM_APPSECRET aXXXXXXXb