Matlab simulink project

My project is to extend the battery range of electric haulage vehicles using renewable sources. I need someone to build 2 MATLAB models for me. One is an original model of electric truck and one with the modifications that I tell. I don't have any designs for the original model so your knowledge and expertise of electric truck models would be of necessary. For modified truck, modifications will be told.
I'd also need you to explain the models and code to me.