Hello,
I modelled Standalone Battery in the previous software version (2020.11.29) using Generic Battery, Commercial performance model. I compared two different chemistries.
The battery power and capacity was constant for this comparison, i.e., 162.981kW & 437.424kWh. The change in NPV when only switching the battery chemistry is very substantial. For 'Lead Acid: Flooded' NPV is $30,210, while for the 'NCM/Graphite' it equals to $-164,665. Batteries are of the same size, the same CAPEX assumed. There is a substantial difference in 'Net savings with system' between these two as well, $48,099 and $16,612 respectively, which definitely influences the NPV itself.
What is a reason for a such substantial difference between these two chemistries and their performance in the older version of the software? Were there any issues with this calculation?
I did the same exercise using the newest version of the software (2021.12.2). The difference in NPV and 'Net savings with system' is much smaller, ΔNPV=$33,629, ΔNet savings=$1,627.
What were the changes between these two versions of the software?
Many Thanks in advance!
Regards,
Agnes