diff --git a/esphome/components/binary_sensor_map/binary_sensor_map.cpp b/esphome/components/binary_sensor_map/binary_sensor_map.cpp
index b2dffaf74d..3934e0a99c 100644
--- a/esphome/components/binary_sensor_map/binary_sensor_map.cpp
+++ b/esphome/components/binary_sensor_map/binary_sensor_map.cpp
@@ -30,7 +30,7 @@ void BinarySensorMap::process_group_() {
     if (bs.binary_sensor->state) {
       num_active_sensors++;
       total_current_value += bs.sensor_value;
-      mask |= 1 << i;
+      mask |= 1ULL << i;
     }
   }
   // check if the sensor map was touched
@@ -38,12 +38,11 @@ void BinarySensorMap::process_group_() {
     // did the bit_mask change or is it a new sensor touch
     if (this->last_mask_ != mask) {
       float publish_value = total_current_value / num_active_sensors;
-      ESP_LOGD(TAG, "'%s' - Publishing %.2f", this->name_.c_str(), publish_value);
       this->publish_state(publish_value);
     }
   } else if (this->last_mask_ != 0ULL) {
     // is this a new sensor release
-    ESP_LOGD(TAG, "'%s' - No binary sensor active, publishing NAN", this->name_.c_str());
+    ESP_LOGV(TAG, "'%s' - No binary sensor active, publishing NAN", this->name_.c_str());
     this->publish_state(NAN);
   }
   this->last_mask_ = mask;
@@ -52,28 +51,22 @@ void BinarySensorMap::process_group_() {
 void BinarySensorMap::process_sum_() {
   float total_current_value = 0.0;
   uint64_t mask = 0x00;
-  // check all binary_sensors for its state. when active add its value to total_current_value.
-  // create a bitmask for the binary_sensor status on all channels
+  // - check all binary_sensor states
+  // - if active, add its value to total_current_value
+  // - creates a bitmask for the binary_sensor status on all channels
   for (size_t i = 0; i < this->channels_.size(); i++) {
     auto bs = this->channels_[i];
     if (bs.binary_sensor->state) {
       total_current_value += bs.sensor_value;
-      mask |= 1 << i;
+      mask |= 1ULL << i;
     }
   }
-  // check if the sensor map was touched
-  if (mask != 0ULL) {
-    // did the bit_mask change or is it a new sensor touch
-    if (this->last_mask_ != mask) {
-      float publish_value = total_current_value;
-      ESP_LOGD(TAG, "'%s' - Publishing %.2f", this->name_.c_str(), publish_value);
-      this->publish_state(publish_value);
-    }
-  } else if (this->last_mask_ != 0ULL) {
-    // is this a new sensor release
-    ESP_LOGD(TAG, "'%s' - No binary sensor active, publishing 0", this->name_.c_str());
-    this->publish_state(0.0);
+
+  // update state only if the binary sensor states have changed or if no state has ever been sent on boot
+  if ((this->last_mask_ != mask) || (!this->has_state())) {
+    this->publish_state(total_current_value);
   }
+
   this->last_mask_ = mask;
 }
 
diff --git a/esphome/components/binary_sensor_map/sensor.py b/esphome/components/binary_sensor_map/sensor.py
index 025be490cd..573cce9223 100644
--- a/esphome/components/binary_sensor_map/sensor.py
+++ b/esphome/components/binary_sensor_map/sensor.py
@@ -39,7 +39,7 @@ CONFIG_SCHEMA = cv.typed_schema(
         ).extend(
             {
                 cv.Required(CONF_CHANNELS): cv.All(
-                    cv.ensure_list(entry), cv.Length(min=1)
+                    cv.ensure_list(entry), cv.Length(min=1, max=64)
                 ),
             }
         ),
@@ -50,7 +50,7 @@ CONFIG_SCHEMA = cv.typed_schema(
         ).extend(
             {
                 cv.Required(CONF_CHANNELS): cv.All(
-                    cv.ensure_list(entry), cv.Length(min=1)
+                    cv.ensure_list(entry), cv.Length(min=1, max=64)
                 ),
             }
         ),