diff --git a/src/devices/shelly.ts b/src/devices/shelly.ts
index d2b73bda04168..541cdef6cc8a8 100644
--- a/src/devices/shelly.ts
+++ b/src/devices/shelly.ts
@@ -1961,6 +1961,17 @@ export const definitions: DefinitionWithExtend[] = [
         description: "Weather station",
         extend: [
             m.battery(),
+            m.numeric({
+                name: "capacitor_voltage",
+                cluster: "genPowerCfg",
+                attribute: "battery2Voltage",
+                description: "Solar capacitor voltage",
+                unit: "V",
+                scale: 10,
+                reporting: {min: "10_SECONDS", max: "1_HOUR", change: 1},
+                access: "STATE_GET",
+                entityCategory: "diagnostic",
+            }),
             m.illuminance(),
             m.temperature(),
             m.pressure(),