How does having solar change the value of the home

[Corey Kenney]

How is solar considered in terms of property value? I have 2 examples, if I have a potential listing where the owner just purchased a new system and is paying it off over the term of the loan, how would I weigh that against comps that do not have solar. In the second example, I find an unoccupied foreclosure that has solar on the roof that was bought free and clear(just as an example). Now how does this change the way I value it? I know most solar purchases are transferable to new owners but how much is this selling point worth and what value do I put on it in each scenario? I’m sure this is a more common occurrence now a days at least the first example so I’m just looking for insight. Thanks