diff --git a/templates/definition/meter/wattsonic.yaml b/templates/definition/meter/wattsonic.yaml
new file mode 100644
index 000000000..d0d0b4e50
--- /dev/null
+++ b/templates/definition/meter/wattsonic.yaml
@@ -0,0 +1,112 @@
+template: wattsonic
+products:
+  - brand: Wattsonic
+  - brand: Sunway
+  - brand: Solinteng
+  - brand: A-Tronix
+  - brand: St-ems
+params:
+  - name: usage
+    choice: ["grid", "pv", "battery"]
+    allinone: true
+  - name: modbus
+    choice: ["rs485"]
+    port: 502
+    id: 247
+  - name: capacity
+    advanced: true
+  - name: delay
+    default: 100ms
+    advanced: true
+render: |
+  type: custom
+  {{- if eq .usage "grid" }}
+  power: # power (W)
+    source: modbus
+    {{- include "modbus" . | indent 2 }}
+    delay: {{ .delay }}
+    register:
+      address: 11000  # Total Power on Meter
+      type: holding   
+      decode: int32
+    scale: -1
+  currents:
+    - source: modbus
+      {{- include "modbus" . | indent 4 }}
+      delay: {{ .delay }}
+      register:
+        address: 11010  # Grid Phase A Current
+        type: holding
+        decode: uint16
+      scale: 0.1
+    - source: modbus
+      {{- include "modbus" . | indent 4 }}
+      delay: {{ .delay }}
+      register:
+        address: 11012  # Grid Phase B Current
+        type: holding
+        decode: uint16
+      scale: 0.1
+    - source: modbus
+      {{- include "modbus" . | indent 4 }}
+      delay: {{ .delay }}
+      register:
+        address: 11014  # Grid Phase C Current
+        type: holding
+        decode: uint16
+      scale: 0.1
+  powers:
+    - source: modbus
+      {{- include "modbus" . | indent 4 }}
+      delay: {{ .delay }}
+      register:
+        address: 10994  # Phase A Power on Meter
+        type: holding
+        decode: int32
+      scale: -1
+    - source: modbus
+      {{- include "modbus" . | indent 4 }}
+      delay: {{ .delay }}
+      register:
+        address: 10996  # Phase B Power on Meter
+        type: holding
+        decode: int32
+      scale: -1
+    - source: modbus
+      {{- include "modbus" . | indent 4 }}
+      delay: {{ .delay }}
+      register:
+        address: 10998  # Phase C Power on Meter
+        type: holding
+        decode: int32
+      scale: -1
+  {{- end }}
+  {{- if eq .usage "pv" }}
+  power: # power (W)
+    source: modbus
+    {{- include "modbus" . | indent 2 }}
+    delay: {{ .delay }}
+    register:
+      address: 11028    # PV Input Total Power
+      type: holding
+      decode: int32
+  {{- end }}
+  {{- if eq .usage "battery" }}
+  power: # power (W)
+    source: modbus
+    {{- include "modbus" . | indent 2 }}
+    delay: {{ .delay }}
+    register:
+      address: 40258    # Total_Backup_P
+      type: holding
+      decode: int32
+  soc:
+    source: modbus
+    {{- include "modbus" . | indent 2 }}
+    delay: {{ .delay }}
+    register:                         
+      address: 43000    # SOC
+      type: holding
+      decode: int16
+  capacity: {{ .capacity }} # kWh
+  {{- end }}