diff --git a/esphome/components/ee895/ee895.cpp b/esphome/components/ee895/ee895.cpp
index c6eaf4e728..602e31db14 100644
--- a/esphome/components/ee895/ee895.cpp
+++ b/esphome/components/ee895/ee895.cpp
@@ -7,6 +7,9 @@ namespace ee895 {
 
 static const char *const TAG = "ee895";
 
+// Serial number is 16 bytes
+static constexpr size_t EE895_SERIAL_NUMBER_SIZE = 16;
+
 static const uint16_t CRC16_ONEWIRE_START = 0xFFFF;
 static const uint8_t FUNCTION_CODE_READ = 0x03;
 static const uint16_t SERIAL_NUMBER = 0x0000;
@@ -26,7 +29,10 @@ void EE895Component::setup() {
     this->mark_failed();
     return;
   }
-  ESP_LOGV(TAG, "    Serial Number: 0x%s", format_hex(serial_number + 2, 16).c_str());
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
+  char serial_hex[format_hex_size(EE895_SERIAL_NUMBER_SIZE)];
+#endif
+  ESP_LOGV(TAG, "    Serial Number: 0x%s", format_hex_to(serial_hex, serial_number + 2, EE895_SERIAL_NUMBER_SIZE));
 }
 
 void EE895Component::dump_config() {
diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index 37534849d0..ac7a96a8c8 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -728,6 +728,9 @@ inline char *format_hex_to(char (&buffer)[N], T val) {
   return format_hex_to(buffer, reinterpret_cast<const uint8_t *>(&val), sizeof(T));
 }
 
+/// Calculate buffer size needed for format_hex_to: "XXXXXXXX...\0" = bytes * 2 + 1
+constexpr size_t format_hex_size(size_t byte_count) { return byte_count * 2 + 1; }
+
 /// Calculate buffer size needed for format_hex_pretty_to with separator: "XX:XX:...:XX\0"
 constexpr size_t format_hex_pretty_size(size_t byte_count) { return byte_count * 3; }