BATTERY STATE OF CHARGE

Dear fellas, 

How are you? Hoping everything is fine.
 
I've been trying to design a hybrid system, using PV panels and storage (battery 48V and 100Ah). 
I design my battery bank capacity with 53kWh and run a couple of test varying Bank Power, from 1.5kW do 7.2kW. 
PV system with 28 pv panes (555W power peak)

I set a Grid Outage, once it is the main reason for me to design a hybrid with storage. I set 4 (four) diferent periods of the day for grid outage, each one with 6 (six) hour duration, in order to cover the possibility of a grid outage over entire day of operation.   

For Grid Outage, I set a minimum SOC 10% max SOC 97%.

Nevertheless, the results never reach its minimum 10% SOC during outage, it stops in 47%. Although there would exist battery capacity left. I didn't understand why is that. 

For instance,  for one period of outage:

Critical load

time 1 - 6kW
time 2 - 6kW
time 3 - 6kW
time 4 - 4kW
time 5 - 3kW
time 6 - 2kW
Total demand = 27kWh

SOC  (SOC immediately before grid outage starts = 80%. Or rather, the bank capacity of 42,4kkWh)0,6391530,4879940,4820330,4790680,4775850,4775850,4775850,477585
I turns out, that the battery bank didn't reach the minimum outage SOC of 10%, it stopped at 47%.  As you can see above, there would exist  battery bank capacity to supply the entire demand during the period presented above. 

I didn't understand why it doesnt discharged up to 10% in outage. 

Would please help to understand? 

Find attached to this meessage the ".sam" file for your analys. Project named "Hybrid_valendo"

I appreciate any help you can provide.

Best Regards,

Julião Lemos 
 

Julião,

It looks like the voltage table is backwards: I would expect the voltage to go to zero as depth of discharge goes to 100. The voltage table you defined shows the voltage increasing as the battery depth of discharge increases:

 

Best regards,
Paul.

Paul,

Thanks a lot. I look everywhere, but this table. 

Best regards.