diff --git a/homeassistant/components/modbus/base_platform.py b/homeassistant/components/modbus/base_platform.py
index 4539a4e496c51..bbd0c35bcc042 100644
--- a/homeassistant/components/modbus/base_platform.py
+++ b/homeassistant/components/modbus/base_platform.py
@@ -239,7 +239,7 @@ def unpack_structure_result(self, registers: list[int]) -> str | None:
                     v_result.append("0")
                 elif v_temp != v_temp:  # noqa: PLR0124
                     # NaN float detection replace with None
-                    v_result.append("nan")
+                    v_result.append("0")
                 else:
                     v_result.append(f"{float(v_temp):.{self._precision}f}")
             return ",".join(map(str, v_result))