Accumulator example

HTML entities are fine here: (Σ → Σ)

Define all your required channels, put this all together and you should have the following definition:

Please note:

• The real sensor channels storing the data for P_AC, P_DC1, P_DC2 etc. must be defined for each inverter!
• Grouping channels like Σ Pdc could be defined once.
  They find out their correct child channels from their position in the channel tree on request.