Tesla PowerWall configuration note

configuration.md

@@ -219,7 +219,18 @@ The python client example needs to include the timestamp e.g:
 
     s.sendall(str(time.time())+' 98 3.8 1.6 5.2 80.3\r\n')
 
+### e.) Tesla Power Wall Interfacer
 
+This interfacer fetches the state of charge of a Tesla Power Wall on the local network. Enter your PowerWall IP-address or hostname in the URL section of the following emonhub.conf configuration:
+
+    [[PowerWall]]
+        Type = EmonHubTeslaPowerWallInterfacer
+        [[[init_settings]]]
+        [[[runtimesettings]]]
+            pubchannels = ToEmonCMS,
+            name = powerwall
+            url = http://POWERWALL-IP/api/system_status/soe
+            readinterval = 10
                     
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