simulating DC Coupled BESS

Hi

Im trying to build a DC coupled PV + BESS simulation. My objective is to simulate both AC and DC coupled systems with the same parameters and then compare the efficiencies of both at each stage.

I was able to find a "Peak Shaving with BESS" demo in the Simscape examples but as per my understanding, that represents an AC coupled system.

My main issue is that I am not sure how to work around that Peak Shaving example to simulate a DC coupled system.

Also, I understand that there are multiple types of DC coupling such as - Conventional, Reverse or Hybrid. I just need assistance for any one model, preferably the Conventional DC Coupled BESS system. Once I understand the basics of how to build it I can learn and replicate it for the rest.

Also, an unrelated doubt - is the system presented below also a valid DC coupled PV+BESS system? Why?

source: https://doi.org/10.1109/PVSC.2018.8547329

Best Regards

Prakhar