diff --git a/src/hm/hmInverter.h b/src/hm/hmInverter.h
index bcf732ea..00f05c79 100644
--- a/src/hm/hmInverter.h
+++ b/src/hm/hmInverter.h
@@ -133,6 +133,7 @@ class Inverter {
         bool          isConnected;       // shows if inverter was successfully identified (fw version and hardware info)
         InverterStatus status;           // indicates the current inverter status
         std::array<alarm_t, 10> lastAlarm; // holds last 10 alarms
+        uint8_t       rxOffset;          // holds the default channel offset between tx and rx channel (nRF only)
         int8_t        rssi;              // RSSI
         uint16_t      alarmCnt;          // counts the total number of occurred alarms
         uint16_t      alarmLastId;       // lastId which was received
@@ -179,7 +180,6 @@ class Inverter {
             tsMaxAcPower       = 0;
 
             memset(&radioStatistics, 0, sizeof(statistics_t));
-            memset(heuristics.txRfQuality, -6, 5);
 
             memset(mOffYD, 0, sizeof(float) * 6);
             memset(mLastYD, 0, sizeof(float) * 6);
diff --git a/src/hm/hmRadio.h b/src/hm/hmRadio.h
index bc1e3652..fbb23b57 100644
--- a/src/hm/hmRadio.h
+++ b/src/hm/hmRadio.h
@@ -154,11 +154,11 @@ class HmRadio : public Radio {
                         mLastIv->mAckCount++;
 
                     //mRxChIdx = (mTxChIdx + 2) % RF_CHANNELS;
-                    mRxChIdx = (mTxChIdx + 3) % RF_CHANNELS;
+                    mRxChIdx = (mTxChIdx + mLastIv->rxOffset) % RF_CHANNELS;
                     mNrf24->setChannel(mRfChLst[mRxChIdx]);
                     mNrf24->startListening();
                     mTimeslotStart = millis();
-                    tempRxChIdx = mRxChIdx;
+                    tempRxChIdx = mRxChIdx;  // might be better to start off with one channel less?
                     rxPendular  = false;
                     mNRFloopChannels = (mLastIv->ivGen == IV_MI);
 
@@ -369,7 +369,10 @@ class HmRadio : public Radio {
                 DBGPRINT(String(mRfChLst[mTxChIdx]));
                 DBGPRINT(F(", "));
                 DBGPRINT(String(mTxRetriesNext));
-                DBGPRINT(F(" retries | "));
+                //DBGPRINT(F(" retries | "));
+                DBGPRINT(F(" ret., rx offset: "));
+                DBGPRINT(String(iv->rxOffset));
+                DBGPRINT(F(" | "));
                 if(*mPrintWholeTrace) {
                     if(*mPrivacyMode)
                         ah::dumpBuf(mTxBuf, len, 1, 4);
diff --git a/src/hm/hmSystem.h b/src/hm/hmSystem.h
index 8229378e..1e8641cb 100644
--- a/src/hm/hmSystem.h
+++ b/src/hm/hmSystem.h
@@ -28,6 +28,8 @@ class HmSystem {
             iv->config     = &mInverter[0].generalConfig->iv[id];
             DPRINT(DBG_VERBOSE, "SERIAL: " + String(iv->config->serial.b[5], HEX));
             DPRINTLN(DBG_VERBOSE, " " + String(iv->config->serial.b[4], HEX));
+            //iv->rxOffset = 5 - (iv->config->serial.b[2] % 5); //RF_CHANNELS;
+            iv->rxOffset = (iv->config->serial.b[1] % 5); //RF_CHANNELS;
             if((iv->config->serial.b[5] == 0x11) || (iv->config->serial.b[5] == 0x10)) {
                 switch(iv->config->serial.b[4]) {
                     case 0x24: // HMS-500