Whether or not you would benefit from a cost segregation study depends on multiple factors. 

It depends on what their appetite is for lending.   

Depends on if the panels were owned or leased.

It might depend on what state the assets are in, and what state the entity structures in.

Of course, with all things, the answers to all these matters will depend on the circumstances.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

So I'd say the answer to your question is it depends.

It will likely depend on where you are looking. 

This will vary depending on if a handyman can do the job or a licensed contractor is needed.

This also depends on how are you calculate cash flow and what you're using to discount for expenses.

@Liz Lynn Great example of a reason to do your own DD first rather than depending on realtors/others.