add manual_load option

SunGather/config-example.yaml

@@ -5,12 +5,13 @@ inverter:
   # timeout: 10           # Default is 10
   # scan_interval: 30     # Default is 30
   connection: sungrow     # options: modbus, sungrow, http
-  # model: "SG7.0RT"      # This is autodected on startup, only needed if detection issues or for testing
+  # model: "SG7.0RT"      # This is autodetected on startup, only needed if detection issues or for testing
                           # See model list here: https://github.com/bohdan-s/SunGather#supported
   # smart_meter: True     # Default is False, Set to true if inverter supports reading grind / house consumption
-  # use_local_time: False # Default False, Uses Inveter time, if try uses PC time when updating timestamps (e.g. PVOutput)
+  # use_local_time: False # Default False, Uses Inventer time, if try uses PC time when updating timestamps (e.g. PVOutput)
   # hybrid: False         # Default false, if you have a Hybrid (battery) set to True
-  # logging: 30           # 10 = Debug, 20 = Info, 30 = Warnning (default), 40 = Error
+  # manual_load: False    # Manually calculate load total_active_power + meter_power if the inverter does not supply it
+  # logging: 30           # 10 = Debug, 20 = Info, 30 = Warning (default), 40 = Error
   # level: 1              # 0 = Model and Solar Generation, 
                           # 1 (default) = Useful data, all required for exports, 
                           # 2 everything your Inverter supports, 

SunGather/registers.yaml

@@ -685,7 +685,7 @@ registers:
 #   - name: "Reserved"    
 #     address: 5152
 #     datatype: "U16"
-    # Folling 2 registers are not in the documentation, but other projects are using them
+    # Following 2 registers are not in the documentation, but other projects are using them
     - name: "export_power"
       level: 3
       address: 5216

SunGather/sungather.py

@@ -282,6 +282,12 @@ def scrape_inverter():
                 inverter["import_from_grid"] = power
         except Exception:
             pass
+    
+    try:
+        if inverter.get('manual_load', False):     # Inverter is returning no data, we need to calculate it manually
+            inverter["load_power"] = int(inverter.get('total_active_power')) + int(inverter.get('meter_power'))
+    except Exception:
+        pass  
 
     # See if the inverter is running, This is added to inverters so can be read via MQTT etc...
     # It is also used below, as some registers hold the last value on 'stop' so we need to set to 0