diff --git a/APP/businessLogic/Inc/parameter.h b/APP/businessLogic/Inc/parameter.h
index 3331e6a..dc34d0b 100644
--- a/APP/businessLogic/Inc/parameter.h
+++ b/APP/businessLogic/Inc/parameter.h
@@ -47,6 +47,7 @@ typedef struct _config_parameter{
     float softStartVolt;                            /* 软启动阈值电压 */
     float MPPTConstantVoltage;                      /* MPPT恒定输出电压 */
     float MPPTReduceConstantVoltage;                /* MPPT降功率运行时控制输入电压稳定值 */
+    float underVoltageProtection;                   /* 电池欠压保护电压 */
 
     /* SL */
     uint16_t Access_Node_Type;              /* 接入节点类型  */
diff --git a/APP/businessLogic/Src/SOE.c b/APP/businessLogic/Src/SOE.c
index ce5292b..aafb09e 100644
--- a/APP/businessLogic/Src/SOE.c
+++ b/APP/businessLogic/Src/SOE.c
@@ -150,6 +150,10 @@ void insertEventsOrderRecord(eventsOrderRecordMode mode)
         soeInfo.insertData->temp = getSolarInCircuitVoltage();
     }
 
+    else if (mode == underVoltageProtection) {
+        soeInfo.insertData->temp = getBatteryVoltage();
+    }
+
     else {
         soeInfo.count++;
         return;
diff --git a/APP/businessLogic/Src/inFlash.c b/APP/businessLogic/Src/inFlash.c
index 6ba79fe..585292d 100644
--- a/APP/businessLogic/Src/inFlash.c
+++ b/APP/businessLogic/Src/inFlash.c
@@ -281,6 +281,7 @@ void config_info_start(void)
     g_cfgParameter.softStartVolt                = 18.5f;
     g_cfgParameter.MPPTConstantVoltage          = 17.0f;
     g_cfgParameter.MPPTReduceConstantVoltage    = 20.0f;
+    g_cfgParameter.underVoltageProtection       = 12.0f;
 
     /* 读取的回路阻抗无效则回路阻抗设置为0 */
    float fTemp;
diff --git a/APP/businessLogic/Src/task.c b/APP/businessLogic/Src/task.c
index ce7083b..349994a 100644
--- a/APP/businessLogic/Src/task.c
+++ b/APP/businessLogic/Src/task.c
@@ -362,7 +362,27 @@ void Task_refreshJudgeData(void)
         num = 0;
         setSOC();
     }
-    
+
+    /* 欠压保护 */
+    /* 连续两次电池电压过低，则关闭输出 */
+    static uint8_t numLow = 0;
+    static uint8_t volageLowFlag = 0;
+    if (getBatteryState() && getBatteryVoltage() < g_cfgParameter.underVoltageProtection) {
+        numLow++;
+    }
+    else {
+        numLow = 0;
+    }
+    if (numLow == 2) {
+        setPowerOutput(FALSE);
+        insertEventsOrderRecord(underVoltageProtection);
+        volageLowFlag = 1;
+    }
+    /* 电压过低后，再次恢复正常电压，则打开输出接口 */
+    if (volageLowFlag && getBatteryState() && getBatteryVoltage() > g_cfgParameter.underVoltageProtection + 0.5f) {
+        setPowerOutput(TRUE);
+        volageLowFlag = 0;
+    }
 
 }
 
diff --git a/tools/chargControlTypes.h b/tools/chargControlTypes.h
index 80cc428..a44e6da 100644
--- a/tools/chargControlTypes.h
+++ b/tools/chargControlTypes.h
@@ -69,6 +69,7 @@ typedef enum {
     InputProtection,                //软件防反输入保护
     startEvent,                     //启动
     abnormalControl,                //异常控制
+    underVoltageProtection,         //电池的欠压保护
 }eventsOrderRecordMode;