Use absolute intermediate power watts

Intermediate meters measure consumption, so those are often negative.
This uses the absolute value, assuming that an intermediate meter
would never measure a consumer and a producer simultaneously.

Author: tomquist

HoymilesZeroExport.py

@@ -365,7 +365,7 @@ def GetHoymilesTemperature():
 def GetHoymilesActualPower():
     try:
         try:
-            Watts = INTERMEDIATE_POWERMETER.GetPowermeterWatts()
+            Watts = abs(INTERMEDIATE_POWERMETER.GetPowermeterWatts())
             logger.info(f"intermediate meter {INTERMEDIATE_POWERMETER.__class__.__name__}: {Watts} Watt")
             return Watts
         except Exception as e: