improve diagrams for hybrid inverters using simcount (#2717)

* check dc_power

* dc power check for sungrow inverter

Author: ndrsnhs

packages/modules/common/simcount/_simcounter.py

@@ -10,7 +10,9 @@ def __init__(self, device_id: int, component_id: int, prefix: str):
         self.prefix = "pv2" if prefix == "pv" and component_id != 1 else prefix
         self.data: Optional[SimCounterState] = None
 
-    def sim_count(self, power: float) -> Tuple[float, float]:
+    def sim_count(self, power: float, dc_power: Optional[float] = None) -> Tuple[float, float]:
+        if (self.prefix == "pv" or self.prefix == "pv2") and dc_power is not None and dc_power == 0:
+            power = 0
         self.data = sim_count(power, self.topic, self.data, self.prefix)
         return self.data.imported, self.data.exported
 

packages/modules/devices/sungrow/sungrow/inverter.py

@@ -50,7 +50,7 @@ def update(self) -> float:
             currents = self.__tcp_client.read_input_registers(5021, [ModbusDataType.INT_16]*3, unit=unit)
             currents = [value * -0.1 for value in currents]
 
-        imported, exported = self.sim_counter.sim_count(power)
+        imported, exported = self.sim_counter.sim_count(power, dc_power)
 
         inverter_state = InverterState(
             power=power,