diff --git a/src/CHANGES.md b/src/CHANGES.md
index a925fdb6..3b8892f2 100644
--- a/src/CHANGES.md
+++ b/src/CHANGES.md
@@ -1,5 +1,10 @@
 # Development Changes
 
+## 0.8.15 - 2023-12-09
+* added support for opendtufusion fusion ethernet shield #886
+* fixed range of HMS / HMT frequencies to 863 to 870 MHz #1238
+* changed `yield effiency` per default to `1.0` #1243
+
 ## 0.8.14 - 2023-12-07
 * fixed decimal points for temperature (WebUI) PR #1254 #1251
 * fixed inverter statemachine available state PR #1252 #1253
diff --git a/src/config/settings.h b/src/config/settings.h
index 058d2546..556c7e76 100644
--- a/src/config/settings.h
+++ b/src/config/settings.h
@@ -442,7 +442,7 @@ class settings {
             mCfg.inst.rstValsCommStop  = false;
             mCfg.inst.startWithoutTime = false;
             mCfg.inst.rstMaxValsMidNight = false;
-            mCfg.inst.yieldEffiency    = 0.955f;
+            mCfg.inst.yieldEffiency    = 1.0f;
 
             for(uint8_t i = 0; i < MAX_NUM_INVERTERS; i++) {
                 mCfg.inst.iv[i].powerLevel  = 0xff; // impossible high value
diff --git a/src/defines.h b/src/defines.h
index 80b94687..ade86df4 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -13,7 +13,7 @@
 //-------------------------------------
 #define VERSION_MAJOR       0
 #define VERSION_MINOR       8
-#define VERSION_PATCH       14
+#define VERSION_PATCH       15
 
 //-------------------------------------
 typedef struct {
diff --git a/src/web/html/setup.html b/src/web/html/setup.html
index 9d447f15..87869fd6 100644
--- a/src/web/html/setup.html
+++ b/src/web/html/setup.html
@@ -169,7 +169,7 @@
                             <div class="col-4"><input type="checkbox" name="strtWthtTm"/></div>
                         </div>
                         <div class="row mb-3">
-                            <div class="col-8">Yield Efficiency (should be between 0.95 and 0.96)</div>
+                            <div class="col-8">Yield Efficiency (Standard 1.0)</div>
                             <div class="col-4"><input type="number" name="yldEff" step="any"/></div>
                         </div>
                     </fieldset>
@@ -444,8 +444,9 @@
             });
             for(var i = 0; i < 31; i++) {
                 esp32cmtPa.push([i, String(i-10) + " dBm"]);
-                if(i < 29)
-                    esp32cmtFreq.push([i, freqFmt.format(860 + i*0.25) + " MHz"]);
+            }
+            for(var i = 12; i < 41; i++) {
+                esp32cmtFreq.push([i, freqFmt.format(860 + i*0.25) + " MHz"]);
             }
             /*ENDIF_ESP32*/
             var led_high_active = [
@@ -797,10 +798,10 @@
                     getAjax("/api/setup", cb, "POST", JSON.stringify(o));
                 }
 
-                function cb(obj) {
+                function cb(obj2) {
                     var e = document.getElementById("res");
-                    if(!obj.success)
-                        e.innerHTML = "error: " + obj.error;
+                    if(!obj2.success)
+                        e.innerHTML = "error: " + obj2.error;
                     else {
                         modalClose();
                         getAjax("/api/inverter/list", parseIv);