diff --git a/include/WebApi_errors.h b/include/WebApi_errors.h
index 3c06468d..0e4099a0 100644
--- a/include/WebApi_errors.h
+++ b/include/WebApi_errors.h
@@ -77,4 +77,8 @@ enum WebApiError {
     SecurityBase = 10000,
     SecurityPasswordLength,
     SecurityAuthSuccess,
+
+    PowerBase = 11000,
+    PowerSerialZero,
+    PowerInvalidInverter,
 };
\ No newline at end of file
diff --git a/src/WebApi_power.cpp b/src/WebApi_power.cpp
index 6426f171..97e4aba6 100644
--- a/src/WebApi_power.cpp
+++ b/src/WebApi_power.cpp
@@ -4,6 +4,7 @@
  */
 #include "WebApi_power.h"
 #include "WebApi.h"
+#include "WebApi_errors.h"
 #include <AsyncJson.h>
 #include <Hoymiles.h>
 
@@ -61,6 +62,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
 
     if (!request->hasParam("data", true)) {
         retMsg[F("message")] = F("No values found!");
+        retMsg[F("code")] = WebApiError::GenericNoValueFound;
         response->setLength();
         request->send(response);
         return;
@@ -70,6 +72,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
 
     if (json.length() > 1024) {
         retMsg[F("message")] = F("Data too large!");
+        retMsg[F("code")] = WebApiError::GenericDataTooLarge;
         response->setLength();
         request->send(response);
         return;
@@ -80,6 +83,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
 
     if (error) {
         retMsg[F("message")] = F("Failed to parse data!");
+        retMsg[F("code")] = WebApiError::GenericParseError;
         response->setLength();
         request->send(response);
         return;
@@ -88,6 +92,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
     if (!(root.containsKey("serial")
             && (root.containsKey("power") || root.containsKey("restart")))) {
         retMsg[F("message")] = F("Values are missing!");
+        retMsg[F("code")] = WebApiError::GenericValueMissing;
         response->setLength();
         request->send(response);
         return;
@@ -95,6 +100,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
 
     if (root[F("serial")].as<uint64_t>() == 0) {
         retMsg[F("message")] = F("Serial must be a number > 0!");
+        retMsg[F("code")] = WebApiError::PowerSerialZero;
         response->setLength();
         request->send(response);
         return;
@@ -104,6 +110,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
     auto inv = Hoymiles.getInverterBySerial(serial);
     if (inv == nullptr) {
         retMsg[F("message")] = F("Invalid inverter specified!");
+        retMsg[F("code")] = WebApiError::PowerInvalidInverter;
         response->setLength();
         request->send(response);
         return;
@@ -120,6 +127,7 @@ void WebApiPowerClass::onPowerPost(AsyncWebServerRequest* request)
 
     retMsg[F("type")] = F("success");
     retMsg[F("message")] = F("Settings saved!");
+    retMsg[F("code")] = WebApiError::GenericSuccess;
 
     response->setLength();
     request->send(response);