fix:太阳能网控，离线报警优化配置。

intc-modules/intc-iot/src/main/java/com/intc/iot/handler/DeviceDataHandler.java

@@ -888,8 +888,25 @@ public class DeviceDataHandler {
             log.debug("[离线告警] 已有等待标记，跳过重复写入: {}", deviceName);
             return;
         }
-        String offlineTime = LocalDateTime.now().format(DATETIME_FORMATTER);
+
+        // 查询设备类型，太阳能网控（type=3）使用独立的延迟时长
         int offlineDelayMinutes = aliyunIotProperties.getOfflineWarnDelayMinutes();
+        try {
+            Device deviceForType = deviceMapper.selectOne(
+                new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<Device>()
+                    .eq(Device::getSerialNum, deviceName)
+                    .select(Device::getDeviceType)
+                    .last("LIMIT 1")
+            );
+            if (deviceForType != null && Integer.valueOf(3).equals(deviceForType.getDeviceType())) {
+                offlineDelayMinutes = aliyunIotProperties.getSolarOfflineWarnDelayMinutes();
+                log.debug("[离线告警] 太阳能网控设备，使用延迟 {} 分钟: {}", offlineDelayMinutes, deviceName);
+            }
+        } catch (Exception e) {
+            log.warn("[离线告警] 查询设备类型失败，使用默认延迟: {}", e.getMessage());
+        }
+
+        String offlineTime = LocalDateTime.now().format(DATETIME_FORMATTER);
         int ttlMinutes = offlineDelayMinutes * OFFLINE_WAIT_TTL_MULTIPLIER;
         RedisUtils.setCacheObject(redisKey, offlineTime, Duration.ofMinutes(ttlMinutes));
         log.info("[离线告警] 设备离线，已记录等待标记，将在 {} 分钟后触发告警: {}", offlineDelayMinutes, deviceName);