P_Batt forecast value calculation issue

[martinarva]

Describe the bug

P_Batt forecast value calculation uses eta_disch as a multiplier and this causes issue where p_batt is lower than it should be.

For example at the moment max sell from battery should be happening.

Pd_max: 15600 eta_disch: 0.95

P_batt should be 15600, but it is 15600 * 0.95 =14 820

I'm using p_batt in automation to set the discharge power and in this case losing some power.

Expected behavior Would be nice to get the real b_batt value. I think it would be beneficial for utilizing battery the most. Maybe it will be a possibility to make the eta_disch calculation for after the p_batt so that load and grid would be correct.