added service "battery"

services.yml

@@ -257,3 +257,50 @@ gps:
     description: "m"
   NrOfSatellites:
     description: "Count"
+
+# https://github.com/victronenergy/venus/wiki/dbus#battery
+battery:           
+  ProductId:                        
+    default: 65535 # 0xFFFF       
+  CustomName:      
+    default: "MQTT BMS"                      
+    persist: true                 
+  Dc/0/Voltage:                   
+    format: "{} V"                
+    description: "V DC"           
+  Dc/0/Current:                   
+    format: "{} A"                                                                       
+    description: "A"              
+  Dc/0/Power:                     
+    format: "{} W"                
+    description: "W"              
+  Dc/0/Temperature:               
+    format: "{} °C"               
+    description: "T1"             
+  Soc:                            
+    format: "{} %"                
+    description: "State of charge"
+  Balancing:                      
+    description: "0 = off, 1 = on"                            
+  Io/AllowToCharge:               
+    description: "0 = off, 1 = on"
+  Io/AllowToDischarge:     
+    description: "0 = off, 1 = on"
+  ConsumedAmphours:          
+    format: "{} Ah"        
+    description: "Ah"  
+  System/MinCellVoltage:                                             
+    format: "{} V"         
+    description: "V DC"
+  System/MaxCellVoltage:     
+    format: "{} V"         
+    description: "V DC"
+  System/NrOfCellsPerBattery:                                                         
+    persist: false                                                                   
+  System/NrOfBatteries:             
+    persist: false       
+  System/BatteriesParallel:
+    persist: false
+  System/BatteriesSeries:
+    persist: false
+