diff --git a/custom_components/solax_modbus/plugin_solis.py b/custom_components/solax_modbus/plugin_solis.py
index a0a585c50..448fa2b16 100644
--- a/custom_components/solax_modbus/plugin_solis.py
+++ b/custom_components/solax_modbus/plugin_solis.py
@@ -2763,6 +2763,8 @@ async def async_determineInverterType(self, hub: Any, configdict: dict[str, Any]
             invertertype = HYBRID | X3 | MPPT4  # Hybrid Gen6  10kW - HV
         elif seriesnumber.startswith("103314"):
             invertertype = HYBRID | X3 | MPPT4  # Hybrid Gen6  12kW - HV
+        elif seriesnumber.startswith("103316"):
+            invertertype = HYBRID | X3 | MPPT4  # Hybrid Gen6  20kW - HV (S6-EH3P20K-H)
         elif seriesnumber.startswith("103330"):
             invertertype = HYBRID | X3  # Hybrid Gen6 10kW - 48v
         elif seriesnumber.startswith("110C"):