Handle multiple battery charge/discharge values in PV surplus charging blueprint

[feinerer]

I am using the PV surplus charging blueprint and would like to understand the best way to handle the battery charge and discharge power values from my Growatt inverter.

The inverter provides two separate values: Charge Power and Discharge Power. Both values are non-negative, but they are never positive at the same time.

An issue arises due to the following limitations in the blueprint:

• Only summation of values is supported (Charge Power + Discharge Power).
• The inversion setting applies only to the aggregated value, not to the individual inputs.

This leads to the following situation:

• When the battery is charging, Charge Power > 0. The aggregated sum value is therefore > 0. However, the inversion flag would need to be set to TRUE to represent "negative = charging."
• When the battery is discharging, Discharge Power > 0. The aggregated sum value is again > 0. In this case, the inversion flag would need to be set to FALSE to represent "positive = discharging."

Since the inversion setting cannot dynamically adapt to the operating state, the current functionality does not allow correct representation of both charging and discharging scenarios.

Possible solutions could be:

• Supporting subtraction instead of only summation (e.g., Discharge Power - Charge Power), or
• Allowing inversion to be configured per individual entity rather than only for the aggregated value.

Or is there any alternative way to implement this use case within the existing functionality?

Thank you for any pointers!

[marq24]

alternative: create a template sensor based on your sources...