diff --git a/tools/esp8266/User_Manual.md b/tools/esp8266/User_Manual.md
index df568bc8..8d743b21 100644
--- a/tools/esp8266/User_Manual.md
+++ b/tools/esp8266/User_Manual.md
@@ -130,3 +130,14 @@ typedef enum { // ToDo: to be verified by field tests
     RelativPersistent = 0x0101  // 257
 } PowerLimitControlType;
 ```
+    
+## Firmware Version collection
+Gather user inverter information here to understand what differs between some inverters.
+
+| Name             | Inverter Typ | FWVersion  | FWBuildYe   | FWBuildMo   | HWPartId    |          |          |
+| -----------------| ----------- | ----------- | ----------- | ----------- | ----------- | -------- | -------- |
+| DanielR92        | HM-1500     |  10016.000  | 2021.000    | 1012.000    | 100.000     |          |          |
+| isdor            | HM-300      | 10014.000   | 2021.000    | 1209.000    | 102.000     |          |          |
+| aschiffler       | HM-1500     | 10012.000   | 2020.000    | 624.000     | 100.000     |          |          |
+| klahus1          | HM-300      | 10010.000   | 2020.000    | 707.000     | 102.000     |          |          |
+| eeprom23         | HM-1200     | 1.0.16      | 2021(-10-12) | 10-12      | 269619207   | 17:06:00 | HWRev 256 |