AA> Var_Act does not represent the storage level in that timeslice and it represents the storage level multiplied by the number of days in that particular season.

No, I have not said that to be generally true. That is correct only for DAYNITE storage, as I have said. The multiplier corresponds to the number of cycles under each parent timeslice. But yes, on the DAYNITE level, the multiplier is indeed the number of days under the parent timelice (the season in your case).

AA> Storage level, what I had thought was the energy content in the storage at that particular time slice.

Yes, of course it is. But VAR_ACT is not, for a DAYNITE or WEEKLY storage that have multiple cycles.

AA> Then Var_Act (T1)+Var_FIn(T1)–Var_FOut(T1)= Var_Act(T2), this relation still holds, right?

Yes, surely that holds, as confirmed by me both in the earlier discussion and in my previous post above.

AA> Instead of energy, if think of a water storage tank which had 300 litres of water in timeslice T1 which is what I understood as the storage level in that timeslice. Now in the timeslice T1, 50 litres of water is poured in (Var_FIn) and 20 litres of water is taken out (Var_Fout), then the storage level in tank will be 330 litres. This will be the storage level in timeslice T2.

No, because Var_Fin and Var_Fout (and also Var_Act, which you did not refer to in the above) are all aggregated over the days in each season. So, assuming 30.345 days, Var_Fin would be 30.345 × 50 litres, Var_Fout would be 30.345 × 20 litres (and Var_Act would be first 30.345 × 300 litres and then 30.345 × 330 litres). Thus, Var_Act is no longer the storage level, but many times larger, just like the seasonal input and output flows are many times larger than the daily ones.

No, I have not said that to be generally true. That is correct only for DAYNITE storage, as I have said. The multiplier corresponds to the number of cycles under each parent timeslice. But yes, on the DAYNITE level, the multiplier is indeed the number of days under the parent timelice (the season in your case).

AA> Storage level, what I had thought was the energy content in the storage at that particular time slice.

Yes, of course it is. But VAR_ACT is not, for a DAYNITE or WEEKLY storage that have multiple cycles.

AA> Then Var_Act (T1)+Var_FIn(T1)–Var_FOut(T1)= Var_Act(T2), this relation still holds, right?

Yes, surely that holds, as confirmed by me both in the earlier discussion and in my previous post above.

AA> Instead of energy, if think of a water storage tank which had 300 litres of water in timeslice T1 which is what I understood as the storage level in that timeslice. Now in the timeslice T1, 50 litres of water is poured in (Var_FIn) and 20 litres of water is taken out (Var_Fout), then the storage level in tank will be 330 litres. This will be the storage level in timeslice T2.

No, because Var_Fin and Var_Fout (and also Var_Act, which you did not refer to in the above) are all aggregated over the days in each season. So, assuming 30.345 days, Var_Fin would be 30.345 × 50 litres, Var_Fout would be 30.345 × 20 litres (and Var_Act would be first 30.345 × 300 litres and then 30.345 × 330 litres). Thus, Var_Act is no longer the storage level, but many times larger, just like the seasonal input and output flows are many times larger than the daily ones.