diff --git a/tools/esp8266/config.h b/tools/esp8266/config.h
index 26ff32c5..34f44aad 100644
--- a/tools/esp8266/config.h
+++ b/tools/esp8266/config.h
@@ -55,7 +55,7 @@
 #define PACKET_BUFFER_SIZE      30
 
 // number of configurable inverters
-#define MAX_NUM_INVERTERS       3
+#define MAX_NUM_INVERTERS       4
 
 // default serial interval
 #define SERIAL_INTERVAL         5
diff --git a/tools/esp8266/hmDefines.h b/tools/esp8266/hmDefines.h
index 18498fd6..eb6634c4 100644
--- a/tools/esp8266/hmDefines.h
+++ b/tools/esp8266/hmDefines.h
@@ -23,12 +23,12 @@ const char* const units[] = {"V", "A", "W", "Wh", "kWh", "Hz", "°C", "%","VAr",
 
 // field types
 enum {FLD_UDC = 0, FLD_IDC, FLD_PDC, FLD_YD, FLD_YW, FLD_YT,
-        FLD_UAC, FLD_IAC, FLD_PAC, FLD_F, FLD_T, FLD_PCT, FLD_EFF,
+        FLD_UAC, FLD_IAC, FLD_PAC, FLD_F, FLD_T, FLD_PFC, FLD_EFF,
         FLD_IRR, FLD_PRA,FLD_ALARM_MES_ID,FLD_FW_VERSION,FLD_FW_BUILD_YEAR,
         FLD_FW_BUILD_MONTH_DAY,FLD_HW_ID,FLD_ACT_PWR_LIMIT,FLD_LAST_ALARM_CODE};
         
 const char* const fields[] = {"U_DC", "I_DC", "P_DC", "YieldDay", "YieldWeek", "YieldTotal",
-        "U_AC", "I_AC", "P_AC", "Freq", "Temp", "Pct", "Efficiency", "Irradiation","P_ACr",
+        "U_AC", "I_AC", "P_AC", "Freq", "Temp", "PFC", "Efficiency", "Irradiation","P_ACr",
         "ALARM_MES_ID","FWVersion","FWBuildYear","FWBuildMonthDay","HWPartId","PowerLimit","LastAlarmCode"};
 const char* const notAvail = "n/a";
 
@@ -54,7 +54,7 @@ const byteAssign_fieldDeviceClass deviceFieldAssignment[] = {
     {FLD_PAC, DEVICE_CLS_PWR,     STATE_CLS_MEASUREMENT},
     {FLD_F,   DEVICE_CLS_FREQ,    STATE_CLS_NONE},
     {FLD_T,   DEVICE_CLS_TEMP,    STATE_CLS_MEASUREMENT},
-    {FLD_PCT, DEVICE_CLS_NONE,    STATE_CLS_NONE},
+    {FLD_PFC, DEVICE_CLS_NONE,    STATE_CLS_NONE},
     {FLD_EFF, DEVICE_CLS_NONE,    STATE_CLS_NONE},
     {FLD_IRR, DEVICE_CLS_NONE,    STATE_CLS_NONE}
 };
@@ -206,7 +206,7 @@ const byteAssign_t hm4chAssignment[] = {
     { FLD_PAC, UNIT_W,   CH0, 50, 2, 10   },
     { FLD_PRA, UNIT_VA,  CH0, 52, 2, 10   },
     { FLD_F,   UNIT_HZ,  CH0, 48, 2, 100  },
-    { FLD_PCT, UNIT_PCT, CH0, 56, 2, 10   },
+    { FLD_PFC, UNIT_PCT, CH0, 56, 2, 10   },
     { FLD_T,   UNIT_C,   CH0, 58, 2, 10   },
     { FLD_ALARM_MES_ID,  UNIT_NONE,   CH0, 60, 2, 1   },
     { FLD_YD,  UNIT_WH,  CH0, CALC_YD_CH0,  0, CMD_CALC },
diff --git a/tools/esp8266/webApi.cpp b/tools/esp8266/webApi.cpp
index f96ff2de..e71de85f 100644
--- a/tools/esp8266/webApi.cpp
+++ b/tools/esp8266/webApi.cpp
@@ -36,7 +36,7 @@ void webApi::loop(void) {
 
 //-----------------------------------------------------------------------------
 void webApi::onApi(AsyncWebServerRequest *request) {
-    AsyncJsonResponse* response = new AsyncJsonResponse(false, 2048);
+    AsyncJsonResponse* response = new AsyncJsonResponse(false, 4096);
     JsonObject root = response->getRoot();
 
     Inverter<> *iv = mApp->mSys->getInverterByPos(0, false);
@@ -54,9 +54,9 @@ void webApi::onApi(AsyncWebServerRequest *request) {
     else
         getNotFound(root, F("http://") + request->host() + F("/api/"));
 
-    response->setLength();
     response->addHeader("Access-Control-Allow-Origin", "*");
     response->addHeader("Access-Control-Allow-Headers", "content-type");
+    response->setLength();
     request->send(response);
 }